Filter
Top Products
36
Service Manual VMH SERIES Heat Controller, Inc.
35
9. Troubleshooting
9.1 Indoor Unit Error Display
Display LED STATUS
E0 EEPROM parameter error
E1 Indoor / outdoor units communication protection
E2 Zero-crossing signal error
E3 Indoor fan speed out of control
E5 Open or short circuit of outdoor temperature sensor
E6 Open or short circuit of room or evaporator temperature sensor
E7 Outdoor fan speed out of control
P0 IBM malfunction or IGBT over-strong current protection
P1 Over voltage or too low voltage protection
P2 Temperature protection of compressor top.
P3
P4
1 outdoor temp below 5°F(-15°C)
Inverter compressor drive error
Note: E4 & P3: Reserved function
9.2 Diagnosis and Solution
9.2.1 EEPROM parameter error diagnosis and solution
Shut off the power supply and turn it on 5s later
Is the EEPROM chip plugged in indoor PCB well?
No
Correct the connection
Replace the main PCB of indoor unit
Does EO code clear
EO: