innovair prestige inverter mini split system:
| Error Codes | Problem |
|---|---|
| E2 | Anti-freezing protection |
| E3 | Block or Low pressure of refrigerant system |
| E4 | Compressor exhaust high temperature protection |
| E5 | AC over-current protection |
| E6 | Communication failure between indoor unit and outdoor unit |
| E8 | Anti-high temperature protection |
| H4 | Anti-high temperature protection |
| H6 | No feedback of indoor fan motor |
| C5 | Jumper cap malfunction protection |
| LP | Indoor unit and outdoor unit doesn't match |
| L3 | Outdoor DC fan motor malfunction |
| L9 | Power protection |
| Fo | Gathering refrigerant |
| F1 | Indoor ambient sensor open or short circuit |
| F2 | Indoor tube sensor open or short circuit |
| F3 | Outdoor ambient sensor open or short circuit |
| F4 | Outdoor tube sensor open or short circuit |
| F5 | Exhaust sensor open or short circuit |
| F6 | Overload limit / drop frequency |
| F8 | Over current limit / drop frequency |
| F9 | High exhaust temperature limit / drop frequency |
| F0 | Refrigerant leakage protection |
| FH | Anti-freezing limit / drop frequency |
| H1 | Defrosting |
| H3 | Compressor overload protection |
| H5 | IPM protection |
| H5 | Module temperature is too high |
| HC | PFC protection |
| EE | Loading EEPROM malfunction |
| PH | High PN voltage protection |
| PL | Low PN voltage protection |
| U7 | 4-way valve reversal abnormal |
| d1/d2/d3 | DRED1 / DRED2 / DRED3 |
| P0 | Compressor Min frequence in test state |
| P1 | Compressor rated frequence in test state |
| P2 | Compressor maximum frequence in test state |
| P3 | Compressor intermediate frequence in test state |
| EU | Frequency limiting (module temperature ) |
| LU | Frequency limiting (power) |
| JF | Malfunction of detecting plate (WIFI ) |
| F0 | Insufficient fluorine protection |
innovair nature inverter mini split system:
| Error Codes | Problem |
|---|---|
| E0 | Indoor unit EEPROM parameter error |
| E1 | Indoor / outdoor units communication error |
| E2 | Zero-crossing signal detection error |
| E3 | Indoor fan speed has been out of control |
| E4 | Indoor room temperature sensor T1 open circuit or short circuit |
| E5 | Evaporator coil temperature sensor T2 open circuit or short circuit |
| EC | Refrigerant leakage detection |
| F1 | Outdoor temperature sensor T4 open circuit or short circuit |
| F2 | Condenser coil temperature sensor T3 open circuit or short circuit |
| F3 | Compressor discharge temperature sensor T5 open circuit or short circuit |
| F4 | Outdoor unit EEPROM parameter error |
| P0 | IPM malfunction or IGBT over-strong current protection |
| P1 | Over voltage or over low voltage protection |
| P4 | Inverter 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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