Indoor unit liquid valve temperature sensor open/short circuited Return air temperature sensor open/ short circuitedĮvaporator temperature sensor open/ short circuited Note: In event of any error, please turn off the unit and contact the professionally skilled personnel. If multi errors occur at the same time, their codes will be displayed circularly. If there is an error occurring during the operation of the system, the error code will be displayed on the LCD, as show in Fig.5.1. Over voltage or too low voltage protection IBM malfunction or IGBT over-strong current protection Open or short circuit of room or evaporator temperature sensor Open or short circuit of outdoor temperature sensor or outdoor unit EEPROM parameter error Indoor/outdoor units communication protection
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