Comfort-Aire Inverter Single Zone Ductless Mini-Split Error Codes for Air Conditioner DVS Series:
| A-DVH24SF-1 | A-DVH18SF-1 | A-DVH09SF-0 | A-DVH12SF-0 |
| B-DVH24SF-1 | B-DVH18SF-1 | B-DVH09SF-0 | B-DVH12SF-0 |
Troubleshooting error Fan speed has been out of control
| No | Error Code | Descryption | Malfunction conditions | Possible causes |
| 1 | E0/F4 | EEPROM parameter error | Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip |
• Installation error • PCB faulty |
| 2 | E1 | Indoor/outdoor unit’s communication | Indoor unit does not receive the feedback from outdoor unit during 110 seconds and this condition happens four times continuously. |
• Wiring error • Indoor or outdoor PCB faulty |
| 3 | E2 | Zero crossing detection error | When PCB does not receive zero crossing signal feedback for 4 minutes or the zero crossing signal time interval is abnormal |
• Connection error • PCB faulty |
| 4 | E3/F5 | Fan speed has been out of control | When indoor fan speed keeps too low (300RPM) for certain time, the unit will stop and the LED will display the failure |
• Wiring error • Fan assembly faulty • Fan motor faulty • PCB faulty |
| 5 | E4/E5/F1/F2/F3 | Open circuit or short circuit of temperature sensor | If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED will display the failure |
• Wiring error • Sensor faulty |
| 6 | EC | Refrigerant Leakage Detection | 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°C(Tcool－35.6°F) does not keep continuous 4 seconds and this situation happens 3 times, the display area will show “EC” and AC will turn off. |
• T2 sensor faulty • Indoor PCB faulty • System problems, such as leakage or blocking. |
| 7 | F0 | Overload current protection | An abnormal current rise is detected when checking the specified current detection circuit |
• Power supply problems. • System blockage • PCB faulty • Wiring error • Compressor malfunction |
| 8 | P0 | IPM malfunction or IGBT over-strong current protection | When the voltage signals that IPM sent to compressor drive chip is abnormal, the display LED will show “P0” and AC will turn off |
• Wiring error • IPM malfunction • Outdoor fan assembly faulty • Compressor malfunction • Outdoor PCB faulty |
| 9 | P1 | Over voltage or too low voltage protection | An abnormal voltage rise or drop is detected by checking the specified voltage detection circuit |
• Power supply problems. • System leakage or blockage • PCB faulty |
| 10 | P2 | High temperature protection of IPM module or compressor top | If the sampling voltage is not 5V, the LED will display the failure | Installation error Power supply problems. System leakage or blockage PCB faulty |
| 11 | P4 | Inverter compressor drive error | 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 |
• Wiring error • IPM malfunction • Outdoor fan assembly faulty • Compressor malfunction • Outdoor PCB faulty |
| 12 | P6 | Low pressure protection | When the pressure of system reach a certain value, the low pressure protector will switch off. After the pressure returns to normal, the protection code will disappear |
• Wiring error • Pressure protector faulty • Fan motor faulty • PCB faulty • System problems. |
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