Indoor Unit Error Display; Troubleshooting; Diagnosis And Solution - Heat Controller VMH09SC-1 Service Manual

Service Manual

9. Troubleshooting

9.1 Indoor Unit Error Display

Display
E0
E1
E2
E3
E5
E6
E7
P0
P1
P2
P3
P4
Note: E4 & P3: Reserved function

9.2 Diagnosis and Solution

EO:
9.2.1 EEPROM parameter error diagnosis and solution
Shut off the power supply and turn it on 5s later
Does EO code clear
Is the EEPROM chip plugged in indoor PCB well?
Replace the main PCB of indoor unit
VMH SerieS
LED STATUS
EEPROM parameter error
Indoor / outdoor units communication protection
Zero-crossing signal error
Indoor fan speed out of control
Open or short circuit of outdoor temperature sensor
Open or short circuit of room or evaporator temperature sensor
Outdoor fan speed out of control
IBM malfunction or IGBT over-strong current protection
Over voltage or too low voltage protection
Temperature protection of compressor top.
1 outdoor temp below 5°F(-15°C)
Inverter compressor drive error
35
No
Correct the connection
36
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