GREE U-Match 5 SERIES UNIT SERVICE MANUAL
57
3.4.2 “E2” Indoor Anti-freezing Protection
Error display: IDU wired controller and IDU receiver light board will display E2
Error judgment condition and method:
Check IDU pipe temperature. When pipe temperature is too low, freeze protection will be activated to
prevent freezing damage of evaporator.
Possible reason
：
■IDU filter and evaporator are dirty
■IDU motor is blocked
■Refrigerant amount is insufficient
■Ambient temperature of IDU and ODU is too low
Troubleshooting：
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