Innovair Air Conditioner Error Codes
Innovair Air Conditioner Error Codes

Innovair Air Conditioner Error Codes

Innovair Air Conditioner Error Codes But no piece of HVAC equipment is flawless. There’s always a possibility your mini split will malfunction. To find out what went wrong, you’ll want to locate where the mini split error codes are displayed. Knowing what these codes refer to can help ensure fast mini split repair, especially if professional help is necessary.

Innovair Air Conditioner Error Code Solutions

Error CodesProblem
E2Anti-freezing protection
E3Block or Low pressure of refrigerant system
E4Compressor exhaust high temperature protection
E5AC over-current protection
E6Communication failure between indoor unit and outdoor unit
E8Anti-high temperature protection
H4Anti-high temperature protection
H6No feedback of indoor fan motor
C5Jumper cap malfunction protection
LPIndoor unit and outdoor unit doesn’t match
L3Outdoor DC fan motor malfunction
L9Power protection
FoGathering refrigerant
F1Indoor ambient sensor open or short circuit
F2Indoor tube sensor open or short circuit
F3Outdoor ambient sensor open or short circuit
F4Outdoor tube sensor open or short circuit
F5Exhaust sensor open or short circuit
F6Overload limit / drop frequency
F8Over current limit / drop frequency
F9High exhaust temperature limit / drop frequency
F0Refrigerant leakage protection
FHAnti-freezing limit / drop frequency
H1Defrosting
H3Compressor overload protection
H5IPM protection
H5Module temperature is too high
HCPFC protection
EELoading EEPROM malfunction
PHHigh PN voltage protection
PLLow PN voltage protection
U74-way valve reversal abnormal
d1/d2/d3DRED1 / DRED2 / DRED3
P0Compressor Min frequence in test state
P1Compressor rated frequence in test state
P2Compressor maximum frequence in test state
P3Compressor intermediate frequence in test state
EUFrequency limiting (module temperature )
LUFrequency limiting (power)
JFMalfunction of detecting plate (WIFI )
F0Insufficient fluorine protection

innovair nature inverter mini split system:

Innovair Mini Split AC Error Codes
Error CodesProblem
E0Indoor unit EEPROM parameter error
E1Indoor / outdoor units communication error
E2Zero-crossing signal detection error
E3Indoor fan speed has been out of control
E4Indoor room temperature sensor T1 open circuit or short circuit
E5Evaporator coil temperature sensor T2 open circuit or short circuit
ECRefrigerant leakage detection
F1Outdoor temperature sensor T4 open circuit or short circuit
F2Condenser coil temperature sensor T3 open circuit or short circuit
F3Compressor discharge temperature sensor T5 open circuit or short circuit
F4Outdoor unit EEPROM parameter error
P0IPM malfunction or IGBT over-strong current protection
P1Over voltage or over low voltage protection
P4Inverter compressor drive error

Diagnosis and Solution – How to Fix?

Error Code: E0/F4

EEPROM parameter error diagnosis and solution (E0/F4)

Malfunction decision conditions: Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip.

Supposed causes: Installation mistake, PCB faulty.

Error Code: E1

Indoor / outdoor unit’s communication diagnosis and solution (E1)

Malfunction decision conditions: Indoor unit does not receive the feedback from outdoor unit during 110 seconds and this condition happens four times continuously.

Supposed causes: Wiring mistake, Indoor or outdoor PCB faulty.

Error Code: E2

Zero crossing detection error diagnosis and solution (E2)

Malfunction decision conditions: When PCB does not receive zero crossing signal feedback for 4 minutes or the zero crossing signal time interval is abnormal.

Supposed causes: Connection mistake, PCB faulty.

Error Code: E3

Fan speed has been out of control diagnosis and solution (E3)

Malfunction decision conditions: When indoor fan speed keeps too low (300RPM) for certain time, the unit will stop and the LED will display the failure.

Supposed causes: Wiring mistake, Fan ass’y faulty, Fan motor faulty, PCB faulty.

Error Code: E5

Open circuit or short circuit of temperature sensor diagnosis and solution (E5)

Malfunction decision conditions: If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED will display the failure.

Supposed causes: Wiring mistake, Sensor faulty.

Error Code: EC

Refrigerant Leakage Detection diagnosis and solution (EC)

Malfunction decision conditions: Define the evaporator coil temp.T2 of the compressor just starts running as Tcool. In the beginning 5 minutes after the compressor starts up, if T2 <Tcool-2℃ does not keep continuous 4 seconds and this situation happens 3 times, the display area will show “EC” and AC will turn off.

Supposed causes: T2 sensor faulty, Indoor PCB faulty, System problems, such as leakage or blocking.

Error Code: P0

IPM malfunction or IGBT over-strong current protection diagnosis and solution (P0)

Malfunction decision conditions: When the voltage signal that IPM send to compressor drive chip is abnormal, the display LED will show “P0” and AC will turn off.

Supposed causes: Wiring mistake; IPM malfunction; Outdoor fan ass’y faulty Compressor malfunction; Outdoor PCB faulty.

Error Code: P1

Over voltage or too low voltage protection diagnosis and solution (P1)

Malfunction decision conditions: An abnormal voltage rise or drop is detected by checking the specified voltage detection circuit.

Supposed causes: Power supply problems, System leakage or block, PCB faulty.

Error Code: P2

High temperature protection of compressor top diagnosis and solution (P2)

Malfunction decision conditions: If the sampling voltage is not 5V, the LED will display the failure.

Supposed causes: Power supply problems, System leakage or block, PCB faulty.

Error Code: P4

Inverter compressor drive error diagnosis and solution (P4)

Malfunction decision conditions: An abnormal inverter compressor drive is detected by a special detection circuit, including communication signal detection, voltage detection, compressor rotation speed signal detection and so on.

Supposed causes: Wiring mistake; IPM malfunction; Outdoor fan ass’y faulty Compressor malfunction; Outdoor PCB faulty.

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