Categories: Comfortaire

Inverter Single Zone Ductless Mini-Split DVS Error Codes

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

Diagnosis and solutions for Comfort-aire inverter aingle zone ductless mini-split air conditioner error codes

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.

Comfort-Aire Ductless Mini-Split Service Manual

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