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Gree Air Conditioners Error Codes

soleusair ac error codes

Fault code is subtracted from the number of green LED flash, blocking unit operation.


E1: refrigerant system high pressure protection


E2: anti-freezing protection


E4: compressor exhaust high temperature protection


E5: AC Over-current Protection


E6: Communication failure between outdoor unit and indoor unit

E8: Anti-High Temperature Protection


H6: No response of indoor fan motor


C5: Protection from jumper cap malfunction


F0: Refrigerant Leakage Protection


F1: Indoor ambient sensor short circuit or open


F2: Indoor tube sensor short circuit or open


F3: Outdoor Ambient Sensor Short Circuit or Open


F4: outdoor tube sensor short circuit or open


F5: Exhaust sensor short circuit or open


F6: Overload limit / drop frequency


F8: At current limit / drop frequency


F9: High Exhaust Temperature Range / Drop Frequency


PH: Voltage protection for PN


U5: AC current detection circuit malfunction


U4: Compressor Reverse Protection


P5: Current Protection in Compressor Phase


B5: inlet tube sensor malfunction


L3: outdoor dc fan motor malfunction


b7: Outlet tube sensor malfunction


FC: Door Malfunction


FE: Compressor overload sensor malfunction


H1: Defrosting


H2: static clearing dust protection


H3: Compressor over load protection


H4: System Unusual Protection


H5: IPM Security


HC: PFC Security


H7: Compressor Damage Step Safety


H0: anti-heating high temperature drop frequency


Lc: Startup Failure


U2: Compressor protection against phase loss


U1: compressor phase current detection circuit malfunction


HE: Compressor demonetization protection


EE: Loading EEPROM malfunction


P6: Communication failure between driver board and main board


PU: Capacitor Charge Malfunction


P7: IPM Sensor Circuit Malfunction


P8: IPM High Temperature Protection


U3: PN voltage drop protection


PL: Low PN Voltage Protection


Pc: current detection circuit malfunction or current sensor malfunction


LD: Compressor loss of phase protection


LE: rotary protection off the compressor


EU: IPM at temperature range / drop frequency


U7: 4-way valve inversion abnormal


U8: Dissection of exhaust temperature sensor


U9: AC power detects zero voltage error


FA: tube temperature at drop frequency


FH: anti-freezing limit / drop frequency


oE: PFC module temperature protection / PFC module sensor malfunction


C5: Connector jumper malfunction: Check if the connector contacts the jumper properly. If the PCB is to be replaced, please remove the old one for the new PCB


F1: Indoor ambient temperature sensor malfunction: Check if the indoor room temperature sensor is properly connected.


F2: Evaporator temperature sensor malfunction: Check whether the evaporation temperature is properly connected.


H1: Defrosting: This is normal


H6: Indoor Fan Block: Check if the terminal of the indoor motor is connected properly. Replace fan motor or indoor board if disabled

  1. The wiring terminal has loose or poor contact between the indoor evaporator temperature sensor and the controller;
  2. Short circuit due to trip-over of parts on the controller;
  3. Indoor evaporator temperature sensor is damaged
  4. The main board is broken.

Gree AC Error Code: F3

Malfunction Name: Outdoor ambient temperature sensor is open / small-circulated

A / C Status: The unit will stop operating when the temperature point is reached. During cooling and drying operations, the compressor turns off and the indoor fan operates; During heating operation, the entire unit ceases operation.

Possible reasons:

  1. The wiring terminal has loose or poor contact between the outdoor ambient temperature sensor and the controller;
  2. Short circuit due to trip-over of parts on the controller;
  3. Outdoor ambient temperature sensor is damaged
  4. The main board is broken.

Gree AC Error Code: H6

Malfunction Name: indoor fan motor does not operate

A / C Status: outdoor fan,indoor fan compressor and electric heat tube stop operation. 2 minutes later, the 4-way valve closes; The horizontal louver stops in the current position.

Possible reasons:

  1. The feedback terminal of the PG motor is not tightly connected.
  2. The control terminal of the PG motor is not tightly connected.
  3. 3. A/C Fan blade rotates roughly due to improper installation.
  1. A/C Motor is not installed properly and tightly.
  2. Motor is damaged.
  3. Controller is damaged

Gree AC Error Code: C5

Malfunction Name: Jumper Cap Malfunction Protection

A / C Status: Remote controller or control panel operation is available, but the unit has not functioned

Possible Cause: There is no jumper cap on the controller. The jumper cap is not inserted properly and tightly. The jumper cap is damaged. The controller is damaged.


Gree AC Error Code: U8

Malfunction Name: indoor fan circuit malfunction by zero cross detection

A / C Status: Remote controller or control panel operation is available, but the unit has not functioned

Possible Cause: The controller is damaged.


Gree AC error code: E2

Malfunction Name: Antifreezing Protection

A / C Status: During cooling and drying operations, the compressor and outdoor fan are switched off, while the indoor fan operates.

Possible reasons:

  1. Poor air-return to the indoor unit;
  2. Unusual fan speed;
  3. Dirty evaporator;
  4. The system is normal but the indoor tube temperature sensor is abnormal, or the tube temperature sensor is not well connected.

Gree AC Error Code: E3

Malfunction Name: Compressor Low Pressure Protection

A / C Status: Entire unit shuts down

Possible reasons:

  1. The main board and display panel are not well connected.
  2. The LPP terminal on the main board is not well connected, with a high pressure switch on the entire unit.
  3. The wiring of HP(high pressure) switch is loosened. The high pressure switch is damaged or has poor contact.
  4. insufficient or leaking for refrigerant.
  5. LPP input is at a high level.

Gree AC Error Code: E1

Malfunction Name: High pressure protection of the system

A / C Status: During cooling and drying operations, all loads cease operation, except for the indoor fan being operated. During heating operation, the entire unit shuts down

Possible reasons:

  1. The refrigerant was superbundant;
  2. Poor heat exchange (including dirty interruption of the heat exchanger and poorly irradiated environments); The ambient temperature is too high.

Gree AC Error Code: E4

Malfunction Name: High discharge temperature protection of the compressor

A / C Status: During cooling and drying operations, the compressor and outdoor fan are switched off, while the indoor fan operates. During heating operation, all loads are switched off

Possible causes: Please refer to the malfunction analysis (discharge protection, overload).


Gree AC Error Code: E5

Malfunction Name: Over-protection

A / C Status: During cooling and drying operations, the compressor and outdoor fan are switched off, while the indoor fan operates. During heating operation, all loads are switched off

Possible reasons:

  1. The supply voltage is unstable;
  2. The supply voltage is too low and the load is too high;
  3. The evaporator is dirty.

Gree AC Error Code: E6

Malfunction Name: Communication Malfunction

A / C Status: During cooling operation, the compressor turns off, while the indoor fan motor operates. During heating operation, the entire unit shuts down

Possible Causes: See related malfunction analysis


Gree AC Error Code: E8

Malfunction Name: High temperature resistant protection

A / C Status: During cooling operation: The compressor will shut down, while the indoor fan will operate. During heating operation, the entire unit shuts down

Possible reasons: Refer to malfunction analysis (overload, high temperature resistant)


Gree AC Error Code: F4

Malfunction Name: Outdoor condenser temperature sensor is open / short circulated

A / C Status: During cooling and drying operations, the compressor stops, while the indoor fan will operate; During heating operation, the entire unit will cease operation.

Possible Cause: The outdoor temperature sensor is not well connected or damaged. Please check this by referencing the resistance table for the temperature sensor)


Gree AC Error Code: F5

Malfunction Name: Outdoor discharge temperature sensor is open / short circulated

A / C Status: During cooling and drying operations, the compressor will sleep after working for approximately 3 minutes, while the indoor fan will operate; During heating operation, the entire unit will shut down after working for about 3 minutes

Possible reasons:

  1. The outdoor temperature sensor is not well connected or damaged. Please check this by referencing the resistance table for the temperature sensor)
  2. 2. The head of the temperature sensor is not inserted into the copper tube

Gree AC Error Code: F6

Malfunction Name: Air conditioner Limit / decrease frequency due to overload

A / C Status: All loads work normally, while the operation frequency for the compressor decreases

Possible reasons: Refer to malfunction analysis (overload, high temperature resistant)


Gree AC Error Code: F8

Malfunction Name: Decrease in frequency due to overgrowth

A / C Status: All loads work normally, while the operation frequency for the compressor decreases

Possible reasons: the input supply voltage is too low; System pressure is too high and overload


Gree AC Error Code: F9

Malfunction Name: Reduction in frequency due to high air discharge

A / C Status: All loads work normally, while the operation frequency for the compressor decreases

Possible reasons:

  1. Overload or temperature too high;
  2. Chill is insufficient;
  3. Electrical expansion valve malfunction (EKV)

Gree AC Error Code: PH

Malfunction Name: Voltage too high for DC bus-bar

A / C Status: During cooling and drying operations, the compressor will shut down, while the indoor fan will operate; During heating operation, the entire unit will cease operation.

Possible reasons:

  1. Measure the voltages of position L and N on the wiring board (XT), if the voltage is greater than 265VAC, turn on the unit after the supply voltage rises to the normal range.
  2. If the AC input is normal, measure the voltage of the electrolytic capacitor C on the control panel (AP1), if it is normal, there is a malfunction to the circuit, please replace the control panel (AP1)

Gree AC Error Code: U5

Malfunction Name: Complete Identity Malfunction of the complete unit

A / C Status: During cooling and drying operations, the compressor will shut down, while the indoor fan will operate; While operating the heating, the entire unit will cease operation.

Possible cause: There is a circuit malfunction on the control panel AP1 of the outdoor unit, please replace the control panel AP1 of the outdoor unit.


Gree AC Error Code: P5

Malfunction Name: Overcrack protection of phase current for compressor

A / C Status: During cooling and drying operations, the compressor will shut down, while the indoor fan will operate; During heating operation, the entire unit will cease operation

Possible causes: Refer to malfunction analysis (IPM protection, loss of synchronization protection and over-protection of phase current for the compressor.


Gree AC Error Code: H1

Malfunction Name: Defrosting

A / C Status: Defrosting will be in heating mode. The compressor will work while the indoor fan stops operating.

Possible Cause: This is normal condition


Gree AC error code: H2

Malfunction Name: Static Surrender Protection


Gree AC Error Code: H3

Malfunction Name: Overload protection for compressor

A / C Status: During cooling and drying operations, the compressor will shut down, while the indoor fan will operate; During heating operation, the entire unit will cease operation

Possible reasons:

  1. The wiring terminal OVC-COMP is loose. In normal condition, the resistance for this terminal should be less than 1 ohm.
  2. Refer to malfunction analysis (discharge protection, overload)

Gree AC Error Code: H4

Malfunction Name: System is abnormal

A / C Status: During cooling and drying operations, the compressor will shut down, while the indoor fan will operate; During heating operation, the entire unit will cease operation.

Possible reasons: Refer to malfunction analysis (overload, high temperature resistant)


Gree AC Error Code: H5

Malfunction Name: IPM Security

A / C Status: During cooling and drying operations, the compressor will shut down, while the indoor fan will operate; During heating operation, the entire unit will cease operation.

Possible causes: Refer to malfunction analysis (IPM protection, loss of synchronization protection and over-protection of phase current for the compressor.


Gree AC Error Code: HC

Malfunction Name: PFC Security

A / C Status: During cooling and drying operations, the compressor will shut down, while the indoor fan will operate; During heating operation, the entire unit will cease operation.

Possible Causes: Refer to Malfunction Analysis


Gree AC Error Code: H7

Malfunction Name: Desynchronizing of Compressor

A / C Status: During cooling and drying operations, the compressor will shut down, while the indoor fan will operate; During heating operation, the entire unit will cease operation.

Possible causes: Refer to malfunction analysis (IPM protection, loss of synchronization protection and over-protection of phase current for the compressor.


Gree AC Error Code: H0

Malfunction Name: Reduction in frequency due to high temperature resistor during heating operation

A / C Status: All loads work normally, while the operation frequency for the compressor decreases

Possible reasons: Refer to malfunction analysis (overload, high temperature resistant)


Gree AC Error Code: Lc

Malfunction Name: Failure Start-up

A / C Status: During cooling and drying operations, the compressor will shut down, while the indoor fan will operate; During heating operation, the entire unit will cease operation

Possible Causes: Refer to Malfunction Analysis


Gree AC Error Code: U1

Malfunction Name: Phase current detection circuit malfunction for compressor

A / C Status: During cooling and drying operations, the compressor will shut down, while the indoor fan will operate; During heating operation, the entire unit will shut down

Possible cause: change external control panel AP1


Gree AC error code: EE

Malfunction Name: EEPROM Malfunction

A / C Status: During cooling and drying operations, the compressor will shut down, while the indoor fan will operate; During heating operation, the entire unit will shut down

Possible cause: change external control panel AP1


Gree AC error code: Pu

Malfunction name: Charging capacitor malfunction

A / C Status: During cooling and drying operations, the compressor will shut down, while the indoor fan will operate; During heating operation, the entire unit will shut down

Possible Cause: Refer to Part Three — Malfunction Analysis of Capacitor


Gree AC Error Code: P7

Malfunction Name: Module temperature sensor circuit malfunction

A / C Status: During cooling and drying operations, the compressor will shut down, while the indoor fan will operate; During heating operation, the entire unit will shut down

Possible cause: change external control panel AP1


Gree AC Error Code: P8

Malfunction Name: Module High Temperature Protection

A / C Status: During cooling operation, the compressor will shut down, while the indoor fan will operate; During heating operation, the entire unit will shut down

Possible Cause: After the entire unit is de-energized for 20 units, check whether the thermal grease on the IPM module of the outdoor control panel AP1 is sufficient and whether the radiator is tightly inserted. If it is of no use, please change the control panel AP1.


Gree AC Error Code: U3

Malfunction Name: DC bus-bar voltage dropout malfunction

A / C Status: During cooling and drying operations, the compressor will shut down, while the indoor fan will operate; During heating operation, the entire unit will shut down

Possible Cause: The supply voltage is unstable


Gree AC Error Code: PL

Malfunction name: DC bus-bar voltage is too low

A / C Status: During cooling and drying operations, the compressor will shut down, while the indoor fan will operate; During heating operation, the entire unit will shut down

Possible reasons:

  1. Measure the voltages at position L and N on the wiring board (XT), if the voltage is greater than 150VAC, turn on the unit after the supply voltage rises to the normal range.
  2. If the AC input is normal, measure the voltage of the electrolytic capacitor C on the control panel (AP1), if it is normal, there is a malfunction to the circuit, please replace the control panel (AP1)

Gree AC Error Code: European Union

Malf. Name: Limit / decrease frequency due to high temp. of module

A / C Status: All loads work normally, while the operation frequency for the compressor decreases

Possible Cause: After the entire unit is de-energized for 20 units to discharge, check whether the thermal grease on the IPM module of the outdoor control panel AP1 is sufficient and whether the radiator is tightly inserted. If it is of no use, please change the control panel AP1.


Gree AC Error Code: U7

Malfunction Name: Four-way valve is abnormal

A / C Status: If this malfunction occurs during heating operation, the entire unit will cease operation

Possible reasons:

  1. Supply voltage is less than AC175V;
  2. The wiring terminal 4V is loose or broken;
  3. 4V is damaged, please replace 4V

Gree AC error code: U9

Malfunction Name: Zero- Crossing of external unit malfunction

A / C Status: During cooling operation, the compressor will shut down, while the indoor fan will operate; During heating, the entire unit will cease operation.

Possible cause: change external control panel AP1


Gree AC Error Code: FH

Malfunction Name: Limit / decrease freq. due to antifreez

A / C Status: All loads work normally, while the operation frequency for the compressor decreases

Possible cause: fan ventilation or fan speed is too low in the indoor unit


Gree Cassette AC Error Code:

In case of malfunction (eg bad smell), immediately turn off the power and contact the service center. Do not repair the a/c by yourself. Incorrect repair can cause a fire. Please contact the service center. Equipment should not be used by children without supervision.

Once the failure occurs with the indoor unit in operation, the green unit LED flashes at intervals of 0.5 seconds.

Fault code is subtracted from the number of green LED flash, blocking unit operation. Between one flash cycle and the next one, a pause of 5 seconds ends.

Error code resolution


E1 High Pressure Protection. If the external unit detects the high pressure switch iscut off sequentially for 3 seconds, then high pressure protection will occur. All loads (except 4-way valve in hOT mode) will be switched off. In this climb, all buttons and remote control signals except the ON / OFF button will be disabled and the system will not be automatically recovered. To eliminate this protection, turn off the unit after power cut or reactivate the unit.


E2 Indoor Coil Freeze Protection. If the indoor unit detects that the evaporator temperature is lower than the protective temperate value when the unit is being run for a period of undercooling or dry mode, the unit will report this defect, in which case the compressor and outdoor fan motor Will be stopped. The unit will not operate until the evaporative temperature exceeds the protective temperature. The value and compressor are stopped for 3-minutes.


E4 Compressor High Discharge Temperature Protection. F When the external unit detects that the discharge temperature exceeds the protective temperature value, the unit will report high discharge temperature protection. If the protection exceeds 6 times, the unitenot will be automatically retrieved. Switch the unit or reactivate the unit after turning off the power to reset this protection.


E6 communication malfunction. If the outdoor unit does not receive data from the indoor unit, a communication fault will be reported. If there is a communication abnormality between the display board and the indoor unit, a communication malfunction will be reported.


E8 Low Indoor Airflow. If the indoor unit does not receive a signal from the indoor fan motor for a 30-sec failure to operate the fan motor, an indoor fan malfunction will be reported. In this climb, the uniten resumes operation automatically after a stop. If the malfunction occurs 6 times within an hour, then UniteKnot will be recovered automatically. To eliminate this malfunction, shut down the unit after power cut or reactivate the unit.


E9 Condensate Overflow Protection. If the indoor unit detects condensate overflow switch warning for 8-secsuccessfully, the system will enter overflow protection. The unit will shut down and will not automatically recover. Close the switch unit and then switch it to eliminate this malfunction.


F0 Indoor Ambient Temperature Sensor on ReturnAir Inlet Malfunction. If the indoor unit detects that the indoor ambient temperature sensor is 5-secsuccessfully, the indoor ambient is open-circuit or shortcrit for temp. Sensor malfunction will be reported. Unitech will resume operation automatically after the malfunction disappears. If the indoor ambient temperature sensor malfunction occurs in fan mode, only the error code is displayed and the indoor unit will function normally.


F1 Indoor evaporator coil temperature sensor malfunction. If the indoor unit shows that the evaporator temperature sensor is open circuit or shortcritic for 5 seconds, then the evaporator temperature sensor malfunction will be reported. The unit will automatically restart after the malfunction disappears. If the evaporator temperature sensor malfunction occurs in fan mode, only the error code is displayed and the indoor unit will operate normally.


F2 Indoor condenser coil temperature sensor malfunction. If the external unit detects the condensercoil temperature sensor open circuit or short-circuit for 5-seconds, the condensercoil temperature sensor malfunction will be reported. Uniteon will resume operation automatically after the malfunction disappears. Ifcondrane temperature sensor malfunction occurs in fan mode, only the error code is displayed and the indoor unit will function normally.


F3 outdoor ambient temperature sensor malfunction. If the external unit detects an external ambient temperature sensor open circuit or shortcritic for 5 seconds, a malfunction of the external ambient temperature sensor will be reported. The unit will automatically restart after the malfunction disappears. If the outdoor ambient temperature sensor malfunction occurs in fan mode, only the errorcode is displayed and the indoor unit will function normally.


F4 compressor discharge temperature sensor malfunction. If the outdoor unit detects that the compressor discharge temperature sensor is open-circuit or short-circuit, after the 5-secsuccessfully compressor has been operating for 3-minutes, the outdoor discharge temperature sensor malfunction will be reported. The malfunction disappears when the unitcan resumes automatically.


F5 Wired Controller Temp. Sensor malfunction. If a wired Tether controller detects an open circuit for 5-secsuccess or a short circuit of its temperature sensor, a wired controller temperature sensor malfunction will be reported.


H1 defrost mode. The system is outdoor outdoor.


H3 Compressor Overload Protection. If the external unit opens the compressor overload switch progressively within 3 seconds, the unit will report information overload protection. If the fault occurs 3 times sequentially, the unit will not correct itself. To eliminate this protection shut down the unit or reactivate the unit.


H4 overload protection. If the indoor unit shows that the evaporator temperature exceeds the protective temperature. Price will report unit overload protection. The unit will resume operation after the evaporator temperature is lower than the protective temperature. The value and compressor are stopped for 3 minutes. If there is more than 6 times protection, the unit will not recover automatically. To eliminate this protection shut down the unit or reactivate the unit.


H6 Outdoor Fan Motor Malfunction. If the external unit does not receive a response signal from the external fan motor for 30-seconds for the fan motor to operate, an external fan motor malfunction will be reported. In this climb, the unit can resume operations automatically after stopping. If the malfunction occurs 6 times within an hour, the unit will not correct itself. Turn off the unit or reactivate the unit to eliminate this malfunction.


U7 reversing or 4-waveway malfunction. After the compressor starts operating in the heating mode, if the outdoor unit detects the difference between the evaporator temperature and the indoor ambient temperature less than the protective value for 10 minutes, the ReversingValve malfunction will be reported and the outdoor The unit will cease operations. If the malfunction occurs 3 times, the unit will not correct itself. Turn off the unit or reactivate the unit to eliminate this malfunction.

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