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Sendo FAQ
Sendo FAQ

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DC engine failure external unit.

Damage in the absence of phase or succession of phases in the supply.

Malfunction in compressor movement.

Power inductor failure or voltage failure.

Temperature sensor failure during compressor depression.

Temperature sensor failure when suctioning the compressor.

External coil temperature sensor failure.

Outdoor temperature sensor failure.

External unit failure.

Internal unit fan failure.

Internal coil temperature sensor failure (includes: input, middle tube, output).

Indoor temperature sensor failure.

Communication errors between the internal and external units.

  • Flashes 1 time / 1 sec.
  • The external ambient temperature in North America exceeds SCOPE.
  • Flashes 4 times / 8 sec.
  • External tube temperature sensor error.
  • Flashes 7 times / 8 sec.
  • External feedback error.
  • Flashes2 times / 8 sec.
  • Coil temperature sensor.
  • Flashes 1 time / 8 sec.
  • Space temperature sensor failure.
  • Flashes 1 time / 1 sec
  • Cold air fan protection
  • Flashes 1 time / 1 sec
  • Defrost indicator

Indicates forced cooling.

Indicates defrosting mode.

Indicates the operation of the wireless controller

Indicates the operation of the wireless controller.

It appears on the internal unit screen when the unit is in normal mode.

The 3 icons indicate the 3 functions respectively.

Problem:

Enable antifreeze protection / Start defrosting

Solve:

When the temperature is hot enough, the operation stops automatically. The unit will start automatically as soon as the defrosting is finished and the temperature of the heat exchanger of the internal unit rises.

Problem:

The temperature of the internal unit evaporator is too low or high and the compressor protection is activated automatically.

Solve:

Turn off the unit, clean the filter, and restart the unit.

If this process does not work, please contact the service managers.

Problem:

Protection or malfunction of an external unit.

Solve:

Contact the service managers.

Problem:

The temperature sensor is disconnected or short-circuited

Solve:

Contact the service managers.

Problem:

Failure to communicate between internal and external units

Solve:

Contact the service managers.

Possible cause:

  1. The intake or extraction of air into the external unit is clogged.
  2. 3-minute protection feature.
  3. Inappropriate temperature adjustment.

Solve:

  1. First remove the obstacle, then start the operation of the unit.
  2. You’ve been here for a while.
  3. Adjust the temperature appropriately.

Possible cause:

  1. The regulated temperature is either too high or too low.
  2. The air filter is clogged with dust.
  3. The intake or extraction of air into the external unit is clogged.
  4. Doors or windows are open.

Solve:

  1. Set to a more appropriate temperature.
  2. Clean the filter.
  3. Remove the obstacle.
  4. Close the doors and windows.

Possible cause:

  1. Loss of power supply.
  2. The power supply is disconnected.
  3. Power fuse’s burned.
  4. The time switch is set.
  5. The batteries in the wireless controller are exhausted.

Solve:

  1. Expect to restore supply.
  2. Reconnect the supply (lift the switch).
  3. Replace security.
  4. Expect or cancel the timer setting.
  5. Replace the batteries.

Ice creation.

IPM temperature sensor failure.

Branch resistance asymmetry error.

Detection of abnormal protection of the air conditioner from the current.

PFC current tension.

IPM of the FPC unit of failure.

IPM of the failure drive.

The compressor is not damaged.

Compressor step error.

Phase over-intensity protection.

Sub-multi-unit error.

Communication error between display screen and main control board.

Protection of external unit current.

Antifreeze protection (external unit).

High temperature protection (internal unit).

Relief protection.

The outer element prevents overload protection.

Protection of lack of fluids.

High voltage protection.

External unit fan zero point detection error.

4-valve toggle error.

Internal unit DC engine error (wardrobe unit).

Suction temperature sensor error.

External drive EEPROM memory error.

External unit communication error.

Protection of hypertension / hypotension of electricity.

External ambient temperature sensor error.

Protection of upper compressor cover.

Oscillation temperature sensor error.

Compressor operation error.

PFC drive error.

Intelligent Power Module (IPM) drive error.

DC engine error of the fan of the external unit.

Internal Drive EEPROM Memory Error.

The internal unit fan’s zero-point detection error.

Humidity sensor error.

Display screen and control board communication error.

Sliding Port Error.

Communication error between internal and external unit.

Fan Engine Error or DC Internal Unit Engine Recharge Error.

Internal Unit Component Temperature Sensor Error.

External Unit Component Temperature Sensor Error.

Indoor Temperature Sensor Error.

1. The switch at the top of the compressor is damaged or disconnected.

2. The control line of the switch at the top of the compressor is disconnected.

3. The circuit of the control switch on the control panel has been destroyed. Please replace the control board.

1. Check if the external ambient temperature is too high or if there is a heat source around the external unit.

2. Check that the sensor and its cable are in good condition.

1. Check if the condenser of the external unit is too dirty, and in such a case clean it.

2. Check if it works at a bad air conditioner time.

3. Check that the sensor and cable are normal.

1. Check if the supplied voltage is off limits (150V~270V)

2. Check that the voltage detection circuit of the IPM base board is abnormal, and if it is abnormal, replace this or the electronic control board.

1. Check if the air conditioner system and pressure are normal.

2. Check that the sensor, its connection cable and the detection circuit are abnormal.

1. Check that the ambient temperature exceeds the normal operating limits of the air conditioner.

2. Check if the current detection circuit is abnormal, and if it is replace the electronic board.

1. Check that the trap between the IPM unit and the component is stable.

2. Check that the compressor is in good condition and replace it if not.

3. Check if the IPM unit is abnormal and replace it accordingly.

1. Check if the filter of the internal unit is too dirty and clean it in this case.

2. Check if there is an obstacle to the internal unit and remove it.

3. Check that the engine of the internal unit is damaged and replace it or the electronic board in case of failure.

1. Check that the pressure of the system is normal so that the pipe is broken, resulting in the leakage of a refrigerant.

2. Check that the temperature sensor of the internal element is correctly in place.

3. Check if the 4-way valve is working properly.

1. Check that the phase power cable is in good condition.

2. Check if there is an error on the central board of the external unit.

1. Turn on and check the operation of the compressor if it is normal.

2. Check if the compressor connection is normal, otherwise repair.

3. Check that the items on the electronic board have been damaged. If they have been destroyed replace these items or the entire board.

1. Check if the sensor resistance is normal, otherwise replace it.

2. Check if the sensor cable is short-circuited or open-circuited, and if the fiss is well adjusted, if a connection to the board has been unstuck, and repair accordingly.

3. When steps 1 and 2 are normal, then the components or IC are damaged, and the electronic board needs replacing.

1. Check if the sensor resistance is normal, otherwise replace it.

2. Check if the sensor cable is short-circuited or open-circuited, and if the fiss is well adjusted, if a connection to the board has been unstuck, and repair accordingly.

3. When steps 1 and 2 are normal, then the components or IC are damaged, and the electronic board needs replacing.

1. Check if the sensor resistance is normal, otherwise replace it.

2. Check if the sensor cable is short-circuited or open-circuited, and if the fiss is well adjusted, if a connection to the board has been unstuck, and repair accordingly.

3. When steps 1 and 2 are normal, then the components or IC are damaged, and the electronic board needs replacing.

1. Check that the compressor connection is stable and if not, connect it firmly.

2. Check that the trap between the IPM unit and the component is stable.

3. Check that the compressor is in good condition and replace it if not.

4. Check if the IPM unit is abnormal and replace it accordingly.

1. Check that contact with the engine cable and socket is correct and ensure good contact.

2. Check that the engine of the internal unit has been damaged and replace it.

3. Check that the controlled silicones and other elements on the electronic control board have been damaged and replace them in this case.

1. Check if the sensor resistance is normal, otherwise replace it.

2. Check if the sensor cable is short-circuited or open-circuited, and if the fiss is well adjusted, if a connection to the board has been unstuck, and repair accordingly.

3. When steps 1 and 2 are normal, then the components or IC are damaged, and the electronic board needs replacing.

1. Check if the sensor resistance is normal, otherwise replace it.

2. Check if the sensor cable is short-circuited or open-circuited, and if the fiss is well adjusted, if a connection to the board has been unstuck, and repair accordingly.

3. When steps 1 and 2 are normal, then the components or IC are damaged, and the electronic board needs replacing.

1. Check that the connection of the external to the internal unit is correct, otherwise connect the L and N and the communication cable, one by one, between internal and external.

2. Measure if the voltage between the zero line and the communication line is a half-wave signal of 18V-30AV, check if the communication circuit on the external and internal central board has been damaged, otherwise replace it.

3. Check if the LED display on the external power board is active, otherwise replace the electronic control board. Check if the operation of the unit is abnormal due to external interference, and if it is, find it and stop it.

Speed > difference 15Hz protection between actual and adjusted speed.

Speed > difference 15Hz protection between front and rear clock.

Protection of incorrect phase of electrical supply.

Zero-speed protection.

MCE/simultaneous/circular loop malfunction.

Dc low voltage protection.

Dc low voltage protection.

Inverter compressor malfunction.

P9 protection was activated 3 times in the space of 30 minutes.

Relief pressure sensor error.

Internal Unit Count Reduction Error for 3 minutes.

P4 protection was activated 3 times in the space of 100 minutes.

P2 protection was activated 3 times in the space of 30 minutes.

P6 protection was activated 3 times in the space of 30 minutes.

External Unit Count Increase Error.

External Unit Count Reduction Error.

Communication error between 0537 (integrated communication circuit) and 0547.

Communication error between DSP (Digital Signal Processor) and 0547 (main IC).

Fan unit protection.

Fixed compressor current protection 1.

Fixed compressor current protection 1.

Inverter drive protection.

High temperature protection temperature exchanger, T3.

Protection of the relief temperature sensor.

Inverter compressor over-intensity protection.

PFC current tension.

IPM of the FPC unit of failure.

IPM of the failure drive.

The compressor is not damaged.

Compressor step error.

Phase over-intensity protection.

Sub-multi-unit error.

Communication error between display screen and main control board.

Protection of external unit current.

Antifreeze protection (external unit).

High temperature protection (internal unit).

Relief protection.

The outer element prevents overload protection.

Protection of lack of fluids.

High voltage protection.

External unit fan zero point detection error.

4-valve toggle error.

Internal unit DC engine error (wardrobe unit).

Suction temperature sensor error.

External drive EEPROM memory error.

External unit communication error.

Protection of hypertension / hypotension of electricity.

External ambient temperature sensor error.

Protection of upper compressor cover.

Oscillation temperature sensor error.

Compressor operation error.

PFC drive error.

Intelligent Power Module (IPM) drive error.

DC engine error of the fan of the external unit.

Internal Drive EEPROM Memory Error.

The internal unit fan’s zero-point detection error.

Humidity sensor error.

Display screen and control board communication error.

Sliding Port Error.

Communication error between internal and external unit.

Fan Engine Error or DC Internal Unit Engine Recharge Error.

Internal Unit Component Temperature Sensor Error.

External Unit Component Temperature Sensor Error.

Indoor Temperature Sensor Error.

The “H6” error of the Sendo Free Match system is due to a low electrical supply voltage.

Please make the necessary measurements in the power supply, and if it is restored, reset to remove the error.

  1. Check whether the condensation pressure is excessive or not
  2. If the temperature is normal, the problem comes from the damaged temperature sensor of the external element, so we proceed to replace the sensor.
  3. Check whether the condenser is blocked by pollutants, whether air circulation is served, whether the engine of the external wing is operating normally or not, and finally whether the entire circulation system is blocked or not

There is a special “Clothes Drying” setting which essentially uses the fan at maximum speed, thus making a greater number of air rotations per unit of time, thus removing the resulting moisture more quickly from the clothes.

Please maintain the desired distance of 20cm around and 30cm at the top.

Variable-colored lighting indicates the humidity level in the space. More specifically:

– Green color: 35% ~ 55%

– Blue color: 56% ~ 70%

– Red color: 71% ~ 85%

The dehumidifier unit is treated as a standard air conditioning unit and we take care of its annual maintenance. Maintenance may be more frequent, depending on the environment in which the plant is used (dusts, pollutants, etc.). Air filters are cleaned every 2 weeks and replaced every 6 months.

Please:

  • try that the local area network password does not contain non-alphanumeric characters
  • reset the unit by pressing the “HEALTH” button 8 times within 5 seconds after you activate the unit.

Remote control can be performed in 2 different ways:

  1. By supplying a wired remote control that carries within the space, all the functions of the pump.
  2. Using two cold contact switches to control:

a) On-Off of the pump and

(b) the cooling/heating mode rotation. They are connected according to the instructions in the technical manual of installation and use.

Because the SMMC heat pump is inverter technology, there is no need to install an inertia tank, as the unit adjusts its performance on its own based on the actual cooling and heating requirements. This practice is endearing and necessary for fixed-speed heat pump (ON-OFF) units.

Before following the resolution steps mentioned in the technical manual, please check the safety of the compressor (behind it). In most cases, fluctuations in the supply voltage lead to its burn. If this is in good condition please proceed to check the central board and compressor, based on the instructions in the manual.

The flow sensor detects water flow outside the desired limits. Check for obstacles in the circuit, clean the filters and vent at the highest point of the network.

It appears in the following cases:

  • Phase ellipse protection
  • Phase sequence protection (most common cause)
  • Low pressure pressostat

For the above reasons, the following solutions are proposed:

  1. Check that the power supply characteristics meet the requirements of the unit.
  2. Replace 2 of the 3 phases of the external unit (most common resolution method).
  3. Check the pressure of the refrigerant (the pressure of the system when the unit shuts down is about 1.0MPa).
  4. If you do not notice a problem with the above, check the pressostat.
  • The SW2(1) switch on the internal board must be placed in the ON position (factory is in the OFF position).

Please check the following points:

  • Control of refrigerant pressures, in relation to specifications. In case of lower pressures, please check for leakage.
  • Internal and external unit sensor status control
  • Please check the 4-way valve as well as its control coil.
  • These are created due to moisture in the defrosting process.
  • This is due to the flow of refrigerant to the unit. Please check the pressures of the refrigeration network according to the specifications.
  • Check that the room temperature is within the operating specifications of the unit.
  • Check to see if the desired moisture level has been reached.
  • Check where the dehumidifier is located and place it on smooth and stable ground.
  • Check if the air filter is clean, and clean it according to instructions if it is not.
  • Check to see if air intake and exit are prevented. Remove any obstacles.
  • Check the electrical supply.
  • Check that the condensate collection bin is full.
  • Check that the condensate collection bin is positioned correctly.

Please note that for the successful connection of the Sendo Ikaros unit to the wifi network of the site, the following steps must be followed:

  • You must log-in either by scanning the QR code in Figure 3 (p. 3) or by typing 6364d in the corresponding field and pressing activation.
  • You must definitely reset your Ikaros (reset) device. The reset takes place by pressing the HEALTH button on the controller 8 times in 5 seconds as soon as you turn on the air conditioner. The implementation of the reset is confirmed when 2 buzzes are heard.
  • Turn on your smart device’s wifi, and connect to your local wifi network.
  • Click “Add Device” on the corresponding page, and if you are still within range of the selected network, the network name will automatically appear in the corresponding field (fig. 6) below which you must enter the input code to that wifi network.
  • Press the button to start the configuration.
  • When the configuration is complete, the app will return to the Device List page.
  • In cases where we have formatting for the first time, or changing the local wifi terminal, the smart device should be connected to the local network before the configuration process starts.
  • The smart device should NOT be connected to a 3G/4G network.
  • It is a good thing that the wifi router name does not contain spaces and characters other than numbers and letters.
  • It is a good thing that the wifi router password does not contain spaces and characters other than numbers and letters.

*Please note that this model does NOT display a wifi icon on the device’s indicators.

Floor Standing On-Off 55.000Btu/h

  • External supply: 5*4mm2
  • Internal supply: 5*2.5mm2
  • Contact: 3*0.75mm2 and 3*1.5 mm2 with shielding (bluedaz)

To add remote and centralized control function, we developed an auxiliary PCB, as shown below:

https://www.dropbox.com/s/s5jcd9qb85l9qbi/MODBUS%20FOR%20LCAC%20-%20Connecting%20instruction.pptx?dl=0

You can try following steps.

1. Change the switch SW_3_1 from off to on. Restart the unit.

2.Closed 5-6 terminal. It means turn off the unit(it’s remote off function)

Disconnect 5-6 terminal, the unit will operate the setting status before the unit switch off(memory function).

For example:

Unit operate cooling mode.

Closed 5-6 port, the unit will stop

Disconnect 5-6 port, the unit will operate cooling mode again.

3.If u can’t control the unit off when u use the on/off function, u can try to change a new PCB.

Good Practices

  1. Once the fan coil has been fitted with a high temperature supply, we consider it ideal to install a three-way valve, which can be controlled by the controller, and when the return of air to the bottom catches the desired temperature, it will cut off the further supply of hot water. This will save the unit from future wear (themanufacturer suggests a temperature of up to 60 oC) and employees from thermal discomfort. Here I note that Midea’s rationale for not stopping the fan is not to stop the heat switching and create an issue in the unit (in its sensitive parts, not necessarily in the element).
  2. Connect the controller according to the attached images, which although irregular, at 2 operating speeds can “cut” the fan when the desired temperature is reached.

Communication problem between internal and external unit.

It should be done:

1. Check the communication cables between the 2 units for cut cables or poor contact.

The actions that your technician should take are as follows:

1. Check the position of the defrost sensor in the external unit of the machine

2. Check the pressures of the refrigerant inside the unit

Actually, C0 is not error code. It means the dehumidifer is continous working,and you need to adjust working mode, so that the unit can quit this C0 status. – It’s not a mistake. It means that the unit is running non-stop and we need to redefine the operating settings to stop the indicator.

The sensor is positioned to the air return. Optionally, we can install a wire controller with ifollow function. – Located on the return of the unit and alternatively with the iFollow function on an optional wireless controller.

The evaporator fan supports only one air flow level. The air flow levels can be adjusted in the room by adjusting the air grids. – The fan motor has only one speed. The speed reaching the interior can be adjusted with moving blinds.

From -20 C to 43 C.

It is 60 C by using only the compressor and up to 70 C by using also the heater. – 60C, exclusively using a compressor and up to 70 C with the help of resistors

We can install either indoor or outdoor only ensuring that the air outlet directed to another space/room (in indoor placement) and the unit is protected from natural water sources or rain (in outdoor placement). – The unit has the ability to be placed in any area we wish, as long as we ensure that the exit of the cool air is placed in a different area and that the air ores are covered at the top so that we do not have rainwater entering the interior of the unit.

There are two available options for both sizes 190 & 300 lts. Either enamel or stainless steel tank. – At both 190 lt and 300lt, there is a choice between enamelled and stainless steel container.

No, it is not needed. – There’s no need to install a circulator.

We can connect to the 300lts model, either with enamel or stainless steel tank. – In models of 300lt, either with enamel or with stainless storage container

First, check if the valves of indoor units are open. Second, check for possible leakages to the connection points between indoor and outdoor units. – We confirm that the valves in the external unit are open (after the internal ones have been connected). We’re checking for leaks at the connection points of the internal and external units.

No, they are not. Operate by heat exchange (enthalpy) in the ducts. Though can be connected in a VRF system. – No, I don’t think so. They have only the airways that are switched enthalpy. However, as a unit it can be connected to the rest of the VRF system.

Probably indicates connection problem between outdoor and indoor units. We should check the power supply, power cord, connection, frequency or PC boards. – Communication error between external and internal unit. Voltage-cable-connection-frequency-plate supply control

Either with joints (refrigerant distributors) or collecter (per 4 units). – Either with joints or with colecters (per 4 units)

In some cases was solved by phase invertion. – In some cases it was resolved by reversing phases.

We can activate the ifollow function using wire controller (wall mounted). – Using a wall-to-wall controller, with iFollow mode

No, we can’t – No, there’s no connection.

Yes we can. – yes, they can connect.

First, we restart the unit. If the error remains we follow tha steps indicated in touble shooting guide. – In the first year, with reset of the unit and if the problem continues, with successive steps of repair based on a fault

The maximun distance for the indoor and outdoor units is 15 m (max length of piping). The maximum level difference should be no more than 5 meters. – 15m total cooling network length and 5m elevation difference

Actually it is not malfunction but only a warning (alarm) for the time the unit operates. In the case of this error a reset of alarm should be done. – It’s not a problem. This is an alarm at the pump’s operating time. We’re just resetting the alarm (Eliwell controller ST542).

In case of multi connection (two or more chiller connected in row) it controls the water temperature between the connected units. – When connecting more than one unit, to control the temperature of the water output from the other unit.

Yes – Ναι

Yes – Ναι

Yes – Ναι

No, you can’t connect.

SNQ is new design subsituting SNH with thicker insulation and inter cabinet material use pre-painted aluminum while SNH is powder paint on steel sheet.

Yes, it is CE certified.

Is the SNQ series CE certified?

Yes, it is CE certified.

What is the main difference between SNQ and SNH freezers?

SNQ is new design subsituting SNH with thicker insulation and inter cabinet material use pre-painted aluminum while SNH is powder paint on steel sheet.

Can we connect two or more mini chillers (inverter) MGC series, to accomplish bigger capacity?

No, we cannot connect.

Can we connect two or more mini chillers (inverter) MGC series, to accomplish bigger capacity?

No, you can’t connect.

Are the wall mounted fan coils equipped with 3-way valve? – Do the wall-to-wall fan coil units have a built-in three-way valve?

Yes – Ναι

Are the wall mounted fan coils equipped with 3-way valve (embodied)? – Do the wall-to-wall fan coil units have a built-in three-way valve?

Yes – Ναι

Can we change the side of water inlet/outlet piping in the fan coils floor standing type? – In Fan Coil flooring, can the promotion/return of water change sides?

Yes – Ναι

What is the purpose of the additional sensor included in the packaging of Midea Digital Scroll Chillers? – Where’s the extra sensor in the Midea Digital Scroll Chiller package?

In case of multi connection (two or more chiller connected in row) it controls the water temperature between the connected units. – When connecting more than one unit, to control the temperature of the water output from the other unit.

What is the meaning of Error 86 in mini chiller? – What kind of problem does the E86 error indicate in mini Chiller?

Actually it is not malfunction but only a warning (alarm) for the time the unit operates. In the case of this error a reset of alarm should be done. – It’s not a problem. This is an alarm at the pump’s operating time. We’re just resetting the alarm (Eliwell controller ST542).

What is the maximun distance and maximum level difference between indoor and outdoor units in split wall mounted ACs? – What is the maximum distance and the maximum elevation difference between the internal and external units?

The maximun distance for the indoor and outdoor units is 15 m (max length of piping). The maximum level difference should be no more than 5 meters. – 15m total cooling network length and 5m elevation difference

What is the actions should be done when F0 error in MARS split units? – What should I do if F0 appears in a MARS series split unit?

First, we restart the unit. If the error remains we follow tha steps indicated in touble shooting guide. – In the first year, with reset of the unit and if the problem continues, with successive steps of repair based on a fault

Can we connect the split wall mounted units with hotel card key ? – Is it possible to connect to a hotel card (dry contact)?

Yes we can. – yes, they can connect.

Can we connect two or more mini chillers in order to accomplish bigger capacity ? – Can Mini VRF units be combined for greater power?

No, we can’t – No, there’s no connection.

How we can get feedback for the room temperature when use vrf indoor units ? – How can there be feedback on room temperature from internal VRF units?

We can activate the ifollow function using wire controller (wall mounted). – Using a wall-to-wall controller, with iFollow mode

What we can do in case of Error P2 in mini VRF units (3 phased) ? – What can we do if P2 is marked in a mini vrf three-phase?

In some cases was solved by phase invertion. – In some cases it was resolved by reversing phases.

What are the suggested methods for connecting the vrf indoor units? – How can the mini VRF’s internal units be connected?

Either with joints (refrigerant distributors) or collecter (per 4 units). – Either with joints or with colecters (per 4 units)

Error E2 in mini VRF 3-phased ?

Probably indicates connection problem between outdoor and indoor units. We should check the power supply, power cord, connection, frequency or PC boards. – Communication error between external and internal unit. Voltage-cable-connection-frequency-plate supply control

Are the VAM units equipped with evaporator or electrical heater ? – Do air-to-air heat recovery units (VAMs) have an electrical resistance element?

No, they are not. Operate by heat exchange (enthalpy) in the ducts. Though can be connected in a VRF system. – No, I don’t think so. They have only the airways that are switched enthalpy. However, as a unit it can be connected to the rest of the VRF system.

What we can do in case the refrigerant does not pass through the indoor unit piping ? – Case of circulation of refrigerant in the network, but not in the internal units.

First, check if the valves of indoor units are open. Second, check for possible leakages to the connection points between indoor and outdoor units. – We confirm that the valves in the external unit are open (after the internal ones have been connected). We’re checking for leaks at the connection points of the internal and external units.

In which combo models can be connected the auxiliary solar kit? – Which models can be connected adjuvant, solar panel?

We can connect to the 300lts model, either with enamel or stainless steel tank. – In models of 300lt, either with enamel or with stainless storage container

Do the combo units need water circulator in their installation? – Does a circulator need in the Combo unit installation?

No, it is not needed. – There’s no need to install a circulator.

What is the water tank material in Combo units ? – What material are storage containers made of?

There are two available options for both sizes 190 & 300 lts. Either enamel or stainless steel tank. – At both 190 lt and 300lt, there is a choice between enamelled and stainless steel container.

Should we install the Combo units indoor or outdoor ? – Can Combo units be installed indoors and outdoors?

We can install either indoor or outdoor only ensuring that the air outlet directed to another space/room (in indoor placement) and the unit is protected from natural water sources or rain (in outdoor placement). – The unit has the ability to be placed in any area we wish, as long as we ensure that the exit of the cool air is placed in a different area and that the air ores are covered at the top so that we do not have rainwater entering the interior of the unit.

What is the maximum temperature of outlet water for the Combo units? – What is the maximum output water temperature?

It is 60 C by using only the compressor and up to 70 C by using also the heater. – 60C, exclusively using a compressor and up to 70 C with the help of resistors

What is the ambient temperature range where the Combo units operate ? – At what ambient temperatures does the unit operate?

From -20 C to 43 C.

How many air flow levels supports the evaporator fan of the rooftop units? – How many speeds does the Rooftop unit fan have?

The evaporator fan supports only one air flow level. The air flow levels can be adjusted in the room by adjusting the air grids. – The fan motor has only one speed. The speed reaching the interior can be adjusted with moving blinds.

Where is the temperature sensor positioned in the roof top units? – Where is the temperature sensor in the Roof top unit?

The sensor is positioned to the air return. Optionally, we can install a wire controller with ifollow function. – Located on the return of the unit and alternatively with the iFollow function on an optional wireless controller.

What means the Error C0 in dehumidifier SDH-40/CH1 ? – What does the C0 error shown in the dehumidifier SDH-40/CH1 mean?

Actually, C0 is not error code. It means the dehumidifer is continous working,and you need to adjust working mode, so that the unit can quit this C0 status. – It’s not a mistake. It means that the unit is running non-stop and we need to redefine the operating settings to stop the indicator.

SENDO 18/CH2 CRONUS_Df Indication

The actions that your technician should take are as follows:

1. Check the position of the defrost sensor in the external unit of the machine

2. Check the pressures of the refrigerant inside the unit

F1 indicator

Communication problem between internal and external unit.

It should be done:

1. Check the communication cables between the 2 units for cut cables or poor contact.

Fan floor coil connected to boiler (temperature ~80oC)

Good Practices

1. Once the fan coil has been fitted with a high temperature supply, we consider it ideal to install a three-way valve, which can be controlled by the controller, and when the return of air to the bottom catches the desired temperature, it will cut off the further supply of hot water. This will save the unit from future wear (themanufacturer suggests a temperature of up to 60 oC) and employees from thermal discomfort. Here I note that Midea’s rationale for not stopping the fan is not to stop the heat switching and create an issue in the unit (in its sensitive parts, not necessarily in the element).

2. Connect the controller according to the attached images, which although irregular, at 2 operating speeds can “cut” the fan when the desired temperature is reached.

We would like to control remotely the “ON-OFF” function of a mini Chiller MGC-V12W/D2RN1 through the terminals 5-6. The problem is that although we place the SW3(1) to the “ON” position, the display doesn’t show “d8”.

You can try following steps.

1. Change the switch SW_3_1 from off to on. Restart the unit.

2. Closed 5-6 terminal. It means turn off the unit(it’s remote off function)

Disconnect 5-6 terminal, the unit will operate the setting status before the unit switch off(memory function).

For example:

Unit operate cooling mode.

Closed 5-6 port, the unit will stop

Disconnect 5-6 port, the unit will operate cooling mode again.

3. If u can’t control the unit off when u use the on/off function, u can try to change a new PCB.

Remote Control for LCAC Unit

To add remote and centralized control function, we developed an auxiliary PCB, as shown below:

https://www.dropbox.com/s/s5jcd9qb85l9qbi/MODBUS%20FOR%20LCAC%20-%20Connecting%20instruction.pptx?dl=0

Sedo On-Off wardrobe unit wiring, 55,000Btu/h

Floor Standing On-Off 55.000Btu/h

  • External supply: 5*4mm2
  • Internal supply: 5*2.5mm2
  • Contact: 3*0.75mm2 and 3*1.5 mm2 with shielding (bluedaz)
Attention points to connecting the Sendo Ikaros unit to a local Wifi network.

Please note that for the successful connection of the Sendo Ikaros unit to the wifi network of the site, the following steps must be followed:

  • You must log-in either by scanning the QR code in Figure 3 (p. 3) or by typing 6364d in the corresponding field and pressing activation.
  • You must definitely reset your Ikaros (reset) device. The reset takes place by pressing the HEALTH button on the controller 8 times in 5 seconds as soon as you turn on the air conditioner. The implementation of the reset is confirmed when 2 buzzes are heard.
  • Turn on your smart device’s wifi, and connect to your local wifi network.
  • Click “Add Device” on the corresponding page, and if you are still within range of the selected network, the network name will automatically appear in the corresponding field (fig. 6) below which you must enter the input code to that wifi network.
  • Press the button to start the configuration.
  • When the configuration is complete, the app will return to the Device List page.
  • In cases where we have formatting for the first time, or changing the local wifi terminal, the smart device should be connected to the local network before the configuration process starts.
  • The smart device should NOT be connected to a 3G/4G network.
  • It is a good thing that the wifi router name does not contain spaces and characters other than numbers and letters.
  • It is a good thing that the wifi router password does not contain spaces and characters other than numbers and letters.

*Please note that this model does NOT display a wifi icon on the device’s indicators.

Dehumidifier’s not working.
  • Check the electrical supply.
  • Check that the condensate collection bin is full.
  • Check that the condensate collection bin is positioned correctly.
The dehumidifier shows little dehumidification performance.
  • Check if the air filter is clean, and clean it according to instructions if it is not.
  • Check to see if air intake and exit are prevented. Remove any obstacles.
The dehumidifier shows increased noise.
  • Check where the dehumidifier is located and place it on smooth and stable ground.
The unit stops suddenly during operation.
  • Check that the room temperature is within the operating specifications of the unit.
  • Check to see if the desired moisture level has been reached.
During cooling mode, a flowing sound of water is heard.
  • This is due to the flow of refrigerant to the unit. Please check the pressures of the refrigeration network according to the specifications.
Water vapour emerges from the external unit during heating operation.
  • These are created due to moisture in the defrosting process.
Although the unit has been recalled in cooling mode, warm air is coming out of the internal unit.
  • Please check the 4-way valve as well as its control coil.
The performance of the unit is significantly reduced than desired.

Please check the following points:

  • Control of refrigerant pressures, in relation to specifications. In case of lower pressures, please check for leakage.
  • Internal and external unit sensor status control
In cooling, by reaching the desired temperature, the fan of the internal unit stops.
  • The SW2(1) switch on the internal board must be placed in the ON position (factory is in the OFF position).
Error code F1 wardrobe unit Sendo On-Off, 55,000 Btu/h.

It appears in the following cases:

  • Phase ellipse protection
  • Phase sequence protection (most common cause)
  • Low pressure pressostat

For the above reasons, the following solutions are proposed:

1. Check that the power supply characteristics meet the requirements of the unit.

2. Replace 2 of the 3 phases of the external unit (most common method of resolution).

3. Check the pressure of the refrigerant (the pressure of the system when the unit shuts down is about 1.0MPa).

4. If you do not notice a problem with the above, check the pressostat.

The pump displays a C8 error.

The flow sensor detects water flow outside the desired limits. Check for obstacles in the circuit, clean the filters and vent at the highest point of the network.

The pump displays a P6 error.

Before following the resolution steps mentioned in the technical manual, please check the safety of the compressor (behind it). In most cases, fluctuations in the supply voltage lead to its burn. If this is in good condition please proceed to check the central board and compressor, based on the instructions in the manual.

Does it need to be placed in the buffer tank?

Because the SMMC heat pump is inverter technology, there is no need to install an inertia tank, as the unit adjusts its performance on its own based on the actual cooling and heating requirements. This practice is endearing and necessary for fixed-speed heat pump (ON-OFF) units.

How can remote control of the Sendo SMMC heat pump be achieved?

Remote control can be performed in 2 different ways:

1. By supplying a wired remote control which carries all the functions of the pump in the space.

2. Using two cold contact switches to control:

a) On-Off of the pump and

(b) the cooling/heating mode rotation. They are connected according to the instructions in the technical manual of installation and use.

The Sendo Aeolos or Ikaros unit cannot be connected to the local wireless network.

Please:

  • try that the local area network password does not contain non-alphanumeric characters
  • reset the unit by pressing the “HEALTH” button 8 times within 5 seconds after you activate the unit.
When do I have to do maintenance on the dehumidifier?

The dehumidifier unit is treated as a standard air conditioning unit and we take care of its annual maintenance. Maintenance may be more frequent, depending on the environment in which the plant is used (dusts, pollutants, etc.). Air filters are cleaned every 2 weeks and replaced every 6 months.

What do the different colour illuminations of San Remo and Portofino dehumidifiers suggest?

Variable-colored lighting indicates the humidity level in the space. More specifically:

– Green color: 35% ~ 55%

– Blue color: 56% ~ 70%

– Red color: 71% ~ 85%

Can I put the dehumidifier in the closet because the clothes inside her smell?

Please maintain the desired distance of 20cm around and 30cm at the top.

What setting should I use for shorter drying of clothes?

There is a special “Clothes Drying” setting which essentially uses the fan at maximum speed, thus making a greater number of air rotations per unit of time, thus removing the resulting moisture more quickly from the clothes.

Error code P4 (Sendo Atlas).

1. Check whether the condensation pressure is excessive or not

2. If the temperature is normal, the problem comes from the damaged temperature sensor of the external element, in which case we proceed to replace the sensor.

3. Check whether the condenser is blocked by pollutants, whether air circulation is served, whether the engine of the external wing is functioning properly or not, and finally whether the entire circulation system is blocked or not

Sendo Free Match System: Show H6 Error

The “H6” error of the Sendo Free Match system is due to a low electrical supply voltage.

Please make the necessary measurements in the power supply, and if it is restored, reset to remove the error.

Error code E1 ( Ikaros )

Indoor Temperature Sensor Error.

Error code E2 ( Ikaros )

External Unit Component Temperature Sensor Error.

Error code E3 ( Ikaros )

Internal Unit Component Temperature Sensor Error.

Error code E4 ( Ikaros )

Fan Engine Error or DC Internal Unit Engine Recharge Error.

Error code E5 ( Ikaros )

Communication error between internal and external unit.

Error code E6 ( Ikaros )

Sliding Port Error.

Error code E8 ( Ikaros )

Display screen and control board communication error.

Error code E9 ( Ikaros )

Humidity sensor error.

EA error code ( Ikaros )

The internal unit fan’s zero-point detection error.

Error code Eb ( Ikaros )

Internal Drive EEPROM Memory Error.

Error code F0 ( Ikaros )

DC engine error of the fan of the external unit.

Error code F1 ( Ikaros )

Intelligent Power Module (IPM) drive error.

Error code F2 ( Ikaros )

PFC drive error.

Error code F3 ( Ikaros )

Compressor operation error.

Error code F4 ( Ikaros )

Oscillation temperature sensor error.

Error code F5 ( Ikaros )

Protection of upper compressor cover.

Error code F6 ( Ikaros )

External ambient temperature sensor error.

Error code F7 ( Ikaros )

Protection of hypertension / hypotension of electricity.

Error code F8 ( Ikaros )

External unit communication error.

Error code F9 ( Ikaros )

External drive EEPROM memory error.

FA Error Code ( Ikaros )

Suction temperature sensor error.

Error code Fb ( Ikaros )

Internal unit DC engine error (wardrobe unit).

Error code FC ( Ikaros )

4-valve toggle error.

Error code Fd ( Ikaros )

External unit fan zero point detection error.

Error code P2 ( Ikaros )

High voltage protection.

Error code P3 ( Ikaros )

Protection of lack of fluids.

Error code P4 ( Ikaros )

The outer element prevents overload protection.

Error code P5 ( Ikaros )

Relief protection.

Error code P6 ( Ikaros )

High temperature protection (internal unit).

Error code P7 ( Ikaros )

Antifreeze protection (external unit).

Error code P8 ( Ikaros )

Protection of external unit current.

Error code P9 ( Ikaros )

Communication error between display screen and main control board.

Error code L0 ( Ikaros )

Sub-multi-unit error.

Error code L1 ( Ikaros )

Phase over-intensity protection.

Error code L2 ( Ikaros )

Compressor step error.

Error code L3 ( Ikaros )

The compressor is not damaged.

Error code L4 ( Ikaros )

IPM of the failure drive.

Error code L5 ( Ikaros )

IPM of the FPC unit of failure.

Error code L6 ( Ikaros )

PFC current tension.

Error code L7 ( Ikaros )

Detection of abnormal protection of the air conditioner from the current.

Error code L8 ( Ikaros )

Branch resistance asymmetry error.

Error code L9 ( Ikaros )

IPM temperature sensor failure.

Error code H0 ( Ikaros )

Ice creation.

Error code E1 (Sendo Free Match)

Air Temperature Error (Tao)

Error code E2 (Sendo Free Match

Tcm or Tdef error

Error code E3 (Sendo Free Match

Temperature Error

Error code E4 (Sendo Free Match)

Internal unit fan engine error.

Error code E5 (Sendo Free Match

INTERNAL/EXTERNAL COMMUNICATION ERROR

Error code F0 (Sendo Free Match

External unit fan engine error.

Error code F1 (Sendo Free Match

Compressor driving error.

Error code F2 (Sendo Free Match

PFC Error

Error code F3 (Sendo Free Match

Incorrect compressor start.

Error code F4 (Sendo Free Match

Td Error

Error code F6 (Sendo Free Match

External unit air temperature sensor error.

Error code F7 (Sendo Free Match

Protection of hypotension or hypertension of electricity.

Error code F8 (Sendo Free Match

Control & Wizard Home Board Communication Error.

Error code F9 (Sendo Free Match

EEPROM OUTDOOR UNIT ERROR

Error code J3/P3 (Sendo Free Match

Refrigerant leakage protection.

FA Error Code (Sendo Free Match)

Temperature sensor error Ts.

Error code J8/P8 (Sendo Free Match

Protection of external unit current.

Error code J5/P5 (Sendo Free Match

High-temperature compressor relief protection.

Error code J4/P4 (Sendo Free Match)

High pressure protection failure (cooling/heating).

Error code H8 (Sendo Free Match)

4-way valve error.

Error code H1 (Sendo Free Match

Condensate run-off failure.

Error code H2 (Sendo Free Match

Radio controller communication error (controller).

Error code H5 (Sendo Free Match

Very low compressor relief temperature.

Error code H6 (Sendo Free Match)

Low-voltage switch error.

Error code H7 (Sendo Free Match

Low pressure protection.

Error code H3 (Sendo Free Match

Evaporator induction temperature sensor error (Te2).

Error code H4 (Sendo Free Match

Evaporator output temperature sensor error (Te1).

Error code H9 (Sendo Free Match

Internal/External Unit Communication Line Offset Error.

Display “E0” error code in Sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units

External unit communication problem.

After how many meters of length of each refrigerant line, does refrigerant need to be filled and how much in the Sendo Free Match system?

For all types of internal unit and all sizes thereof (9K, 12K, 18K), the maximum length not required to supplement a refrigerant shall be 5 metres. After the initial 5 measures, and for all internal unit sizes, 20gr of refrigerant (R410A) is required for each additional refrigerant measure.

Display an “E1” error code in the Sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

Electrical supply phase sequence error.

Display an “E2” error code in the Sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

Communication error between main external unit and internal units.

Display an “E4” error code in the Sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

Ambient temperature sensor error, T4.

Display “E6” error code in Sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

External unit heat exchanger temperature sensor error, T3.

Display an “E8” error code in the Sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

External drive address error.

Display a “P1” error code in the Sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

High pressure protection.

Display a “P2” error code in the Sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

Low pressure protection.

Display a “P3” error code in the Sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

Inverter compressor over-intensity protection.

Display “P4” error code in Sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

Protection of the relief temperature sensor.

Display “P5” error code in Sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

High temperature protection temperature exchanger, T3.

Display a “P6” error code in the Sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

Inverter drive protection.

Display “P7” error code in Sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

Fixed compressor current protection 1.

Display a “P8” error code in the Sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

Fixed compressor current protection 1.

Display a “P9” error code in the Sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

Fan unit protection.

Display “H0” error code in Sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

Communication error between DSP (Digital Signal Processor) and 0547 (main IC).

Display “H1” error code in sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

Communication error between 0537 (integrated communication circuit) and 0547.

Display “H2” error code in sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

External Unit Count Reduction Error.

Display “H3” error code in sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

External Unit Count Increase Error.

Display “H4” error code in Sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

P6 protection was activated 3 times in the space of 30 minutes.

Display “H5” error code in the Sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

P2 protection was activated 3 times in the space of 30 minutes.

Display “H6” error code in Sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

P4 protection was activated 3 times in the space of 100 minutes.

Display “H7” error code in Sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

Internal Unit Count Reduction Error for 3 minutes.

Display “H8” error code in Sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

Relief pressure sensor error.

Display “H9” error code in Sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

P9 protection was activated 3 times in the space of 30 minutes.

Display “L0” error code in Sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

Inverter compressor malfunction.

Display “L1” error code in the Sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

Dc low voltage protection.

Display “L2” error code in the Sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

Dc low voltage protection.

Display “L4” error code in Sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

MCE/simultaneous/circular loop malfunction.

Display “L5” error code in the Sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

Zero-speed protection.

Display “L7” error code in sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

Protection of incorrect phase of electrical supply.

Display “L8” error code in the Sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

Speed > difference 15Hz protection between front and rear clock.

Display “L9” error code in sendo N-Series semi-central air conditioning units (Cassette, Air duct and Ceiling/Floor Units)

Speed > difference 15Hz protection between actual and adjusted speed.

Communication Error F1 (Sendo SFSU 46K)

1. Check that the connection of the external to the internal unit is correct, otherwise connect the L and N and the communication cable, one by one, between internal and external.

2. Measure if the voltage between the zero line and the communication line is a half-wave signal of 18V-30AV, check if the communication circuit on the external and internal central board has been damaged, otherwise replace it.

3. Check if the LED display on the external power board is active, otherwise replace the electronic control board. Check if the operation of the unit is abnormal due to external interference, and if it is, find it and stop it.

Space Temperature Sensor Error, Internal Unit F2 (Sendo SFSU 46K

1. Check if the sensor resistance is normal, otherwise replace it.

2. Check if the sensor cable is short-circuited or open-circuited, and if the fiss is well adjusted, if a connection to the board has been unstuck, and repair accordingly.

3. When steps 1 and 2 are normal, then the components or IC are damaged, and the electronic board needs replacing.

Internal unit element temperature sensor error “F3” (Sendo SFSU 46K) (includes: input, middle segment, export)

1. Check if the sensor resistance is normal, otherwise replace it.

2. Check if the sensor cable is short-circuited or open-circuited, and if the fiss is well adjusted, if a connection to the board has been unstuck, and repair accordingly.

3. When steps 1 and 2 are normal, then the components or IC are damaged, and the electronic board needs replacing.

Internal unit fan error “F4” (Sendo SFSU 46K

1. Check that contact with the engine cable and socket is correct and ensure good contact.

2. Check that the engine of the internal unit has been damaged and replace it.

3. Check that the controlled silicones and other elements on the electronic control board have been damaged and replace them in this case.

External drive error “F5” (Sendo SFSU 46K)

1. Check that the compressor connection is stable and if not, connect it firmly.

2. Check that the trap between the IPM unit and the component is stable.

3. Check that the compressor is in good condition and replace it if not.

4. Check if the IPM unit is abnormal and replace it accordingly.

Environment temperature sensor error of external unit “F6” (Sendo SFSU 46K)

1. Check if the sensor resistance is normal, otherwise replace it.

2. Check if the sensor cable is short-circuited or open-circuited, and if the fiss is well adjusted, if a connection to the board has been unstuck, and repair accordingly.

3. When steps 1 and 2 are normal, then the components or IC are damaged, and the electronic board needs replacing.

External unit temperature sensor error “F7” (Sendo SFSU 46K)

1. Check if the sensor resistance is normal, otherwise replace it.

2. Check if the sensor cable is short-circuited or open-circuited, and if the fiss is well adjusted, if a connection to the board has been unstuck, and repair accordingly.

3. When steps 1 and 2 are normal, then the components or IC are damaged, and the electronic board needs replacing.

“F9” Compressor (Sendo SFSU 46K)

1. Check if the sensor resistance is normal, otherwise replace it.

2. Check if the sensor cable is short-circuited or open-circuited, and if the fiss is well adjusted, if a connection to the board has been unstuck, and repair accordingly.

3. When steps 1 and 2 are normal, then the components or IC are damaged, and the electronic board needs replacing.

“FC” Compressor Driver Error (Sendo SFSU 46K)

1. Turn on and check the operation of the compressor if it is normal.

2. Check if the compressor connection is normal, otherwise repair.

3. Check that the items on the electronic board have been damaged. If they have been destroyed replace these items or the entire board.

Electrical supply phase error “FD” (Sendo SFSU 46K)

1. Check that the phase power cable is in good condition.

2. Check if there is an error on the central board of the external unit.

DC external unit fan motor “FH” error (Sendo SFSU 46K)

1. Check that the pressure of the system is normal so that the pipe is broken, resulting in the leakage of a refrigerant.

2. Check that the temperature sensor of the internal element is correctly in place.

3. Check if the 4-way valve is working properly.

Evaporator temperature protection “P1” (Sendo SFSU 46K)

1. Check if the filter of the internal unit is too dirty and clean it in this case.

2. Check if there is an obstacle to the internal unit and remove it.

3. Check that the engine of the internal unit is damaged and replace it or the electronic board in case of failure.

Protection of overheating and power intensity of the inverter unit “P2” (Sendo SFSU 46K

1. Check that the trap between the IPM unit and the component is stable.

2. Check that the compressor is in good condition and replace it if not.

3. Check if the IPM unit is abnormal and replace it accordingly.

“P3” AC power over-intensity protection (Sendo SFSU 46K)

1. Check that the ambient temperature exceeds the normal operating limits of the air conditioner.

2. Check if the current detection circuit is abnormal, and if it is replace the electronic board.

“P4” compressor relief temperature protection (Sendo SFSU 46K)

1. Check if the air conditioner system and pressure are normal.

2. Check that the sensor, its connection cable and the detection circuit are abnormal.

Low or high voltage “P7” protection (Sendo SFSU 46K

1. Check if the supplied voltage is off limits (150V~270V)

2. Check that the voltage detection circuit of the IPM base board is abnormal, and if it is abnormal, replace this or the electronic control board.

High temperature protection evaporator element “PA” (Sendo SFSU 46K

1. Check if the condenser of the external unit is too dirty, and in such a case clean it.

2. Check if it works at a bad air conditioner time.

3. Check that the sensor and cable are normal.

High temperature protection of external unit “PC” (Sendo SFSU 46K)

1. Check if the external ambient temperature is too high or if there is a heat source around the external unit.

2. Check that the sensor and its cable are in good condition.

“P5” compressor overheat protection (Sendo SFSU 46K)

1. The switch at the top of the compressor is damaged or disconnected.

2. The control line of the switch at the top of the compressor is disconnected.

3. The circuit of the control switch on the control panel has been destroyed. Please replace the control board.

Error code E1 ( Aeolos )

Indoor Temperature Sensor Error.

Error code E2 ( Aeolos )

External Unit Component Temperature Sensor Error.

Error code E3 ( Aeolos )

Internal Unit Component Temperature Sensor Error.

Error code E4 ( Aeolos )

Fan Engine Error or DC Internal Unit Engine Recharge Error.

Error code E5 ( Aeolos )

Communication error between internal and external unit.

Error code E6 ( Aeolos )

Sliding Port Error.

Error code E8 ( Aeolos )

Display screen and control board communication error.

Error code E9 ( Aeolos )

Humidity sensor error.

EA error code ( Aeolos )

The internal unit fan’s zero-point detection error.

Error code Eb ( Aeolos )

Internal Drive EEPROM Memory Error.

Error code F0 ( Aeolos )

DC engine error of the fan of the external unit.

Error code F1 ( Aeolos )

Intelligent Power Module (IPM) drive error.

Error code F2 ( Aeolos )

PFC drive error.

Error code F3 ( Aeolos )

Compressor operation error.

Error code F4 ( Aeolos )

Oscillation temperature sensor error.

Error code F5 ( Aeolos )

Protection of upper compressor cover.

Error code F6 ( Aeolos )

External ambient temperature sensor error.

Error code F7 ( Aeolos )

Protection of hypertension / hypotension of electricity.

Error code F8 ( Aeolos )

External unit communication error.

Error code F9 ( Aeolos )

External drive EEPROM memory error.

FA error code ( Aeolos )

Suction temperature sensor error.

Error code Fb ( Aeolos )

Internal unit DC engine error (wardrobe unit).

Error code FC ( Aeolos )

4-valve toggle error.

Error code Fd ( Aeolos )

External unit fan zero point detection error.

Error code P2 ( Aeolos )

High voltage protection.

Error code P3 ( Aeolos )

Protection of lack of fluids.

Error code P4 ( Aeolos )

The outer element prevents overload protection.

Error code P5 ( Aeolos )

Relief protection.

Error code P6 ( Aeolos )

High temperature protection (internal unit).

Error code P7 ( Aeolos )

Antifreeze protection (external unit).

Error code P8 ( Aeolos )

Protection of external unit current.

Error code P9 ( Aeolos )

Communication error between display screen and main control board.

Error code L0 ( Aeolos )

Sub-multi-unit error.

Error code L1 ( Aeolos )

Phase over-intensity protection.

Error code L2 ( Aeolos )

Compressor step error.

Error code L3 ( Aeolos )

The compressor is not damaged.

Error code L4 ( Aeolos )

IPM of the failure drive.

Error code L5 ( Aeolos )

IPM of the FPC unit of failure.

Error code L6 ( Aeolos )

PFC current tension.

Error code L7 ( Aeolos )

Detection of abnormal protection of the air conditioner from the current.

Error code L8 ( Aeolos )

Branch resistance asymmetry error.

Error code L9 ( Aeolos )

IPM temperature sensor failure.

Error code H0 ( Aeolos )

Ice creation.

The air conditioner does not work at all (SFSU 55K Inverter)

Possible cause:

1. Loss of power supply.

2. The power supply has been disconnected.

3. Power fuse has been burned.

4. The time switch is set.

5. The batteries of the wireless controller are exhausted.

Solve:

1. Expect to restore supply.

2. Reconnect the supply (lift the switch).

3. Replace the fuse.

4. Expect or cancel the timer setting.

5. Replace the batteries.

The air conditioner does not cool or heat properly (SFSU 55K Inverter

Possible cause:

1. The regulated temperature is either too high or too low.

2. The air filter is clogged with dust.

3. The intake or extraction of air into the external unit shall be blocked.

4. Doors or windows are open.

Solve:

1. Set to a more suitable temperature.

2. Clean the filter.

3. Remove the obstacle.

4. Close the doors and windows.

The air conditioner does not cool or heat at all (SFSU 55K Inverter

Possible cause:

1. The intake or extraction of air into the external unit shall be blocked.

2. 3-minute protection feature.

3. Inappropriate temperature adjustment.

Solve:

1. First remove the obstacle and then start the operation of the unit.

2. Just look back for a moment.

3. Adjust the temperature appropriately.

Error code E1 – (SFSU 55K Inverter

Problem:

Failure to communicate between internal and external units

Solve:

Contact the service managers.

Error code E2, E3, E4 – (SFSU 55K Inverter

Problem:

The temperature sensor is disconnected or short-circuited

Solve:

Contact the service managers.

Error code E5, Ed – (SFSU 55K Inverter

Problem:

Protection or malfunction of an external unit.

Solve:

Contact the service managers.

PO Error Code – (SFSU 55K Inverter

Problem:

The temperature of the internal unit evaporator is too low or high and the compressor protection is activated automatically.

Solve:

Turn off the unit, clean the filter, and restart the unit.

If this process does not work, please contact the service managers.

Pg Error Code – (SFSU 55K Inverter

Problem:

Enable antifreeze protection / Start defrosting

Solve:

When the temperature is hot enough, the operation stops automatically. The unit will start automatically as soon as the defrosting is finished and the temperature of the heat exchanger of the internal unit rises.

Error code CP, dF, FC (SFSU 55K Inverter)

It appears on the internal unit screen when the unit is in normal mode.

The 3 icons indicate the 3 functions respectively.

CP Error Code (SFSU 55K Inverter

Indicates the operation of the wireless controller.

CP Error Code (SFSU 55K Inverter

Indicates the operation of the wireless controller

Error code dF (SFSU 55K Inverter

Indicates defrosting mode.

Error code FC (SFSU 55K Inverter)

Indicates forced cooling.

“dF” indicator or flashing the heating icon (Cronus II)
  • Flashes 1 time / 1 sec
  • Defrost indicator
The engine fan image is not moving. (Cronus II)
  • Flashes 1 time / 1 sec
  • Cold air fan protection
Error code E2. (Cronus II)
  • Flashes 1 time / 8 sec.
  • Space temperature sensor failure.
Error code E3. (Cronus II)
  • Flashes2 times / 8 sec.
  • Coil temperature sensor.
Error code E7. (Cronus II)
  • Flashes 7 times / 8 sec.
  • External feedback error.
Error code E6. (Cronus II)
  • Flashes 4 times / 8 sec.
  • External tube temperature sensor error.
Error code FF. (Cronus II)
  • Flashes 1 time / 1 sec.
  • The external ambient temperature in North America exceeds SCOPE.
Error code F1 (Cronus II)

Communication errors between the internal and external units.

Error code F2 (Cronus II)

Indoor temperature sensor failure.

Error code F3 (Cronus II)

Internal coil temperature sensor failure (includes: input, middle tube, output).

Error code F4 (Cronus II)

Internal unit fan failure.

Error code F5 (Cronus II)

External unit failure.

Error code F6 (Cronus II)

Outdoor temperature sensor failure.

Error code F7 (Cronus II)

External coil temperature sensor failure.

Error code F8 (Cronus II)

Temperature sensor failure when suctioning the compressor.

Error code F9 (Cronus II)

Temperature sensor failure during compressor depression.

FA Error Code (Cronus II)

Power inductor failure or voltage failure.

Error code FC (Cronus II)

Malfunction in compressor movement.

Error code FD (Cronus II)

Damage in the absence of phase or succession of phases in the supply.

Error code FH (Cronus II)

DC engine failure external unit.

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