Carrier 38MAQB18-3 - DIAGNOSTIC GUIDES; Indoor Unit Diagnostic Error Codes

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DIAGNOSTIC GUIDES
Table 17—Diagnostic Guides Indoor Units
OPERATION LAMP TIMER LAMP DISPLAY LED STATUS
H 1 time
X E0 Indoor unit EEPROM parameter error
H 2 times
X E1 Indoor / outdoor units communication error
H 4 times
X E3 Indoor fan speed has been out of control
H 5 times
X E4 Indoor room temperature sensor T1 open circuit or short circuit
H 6 times
X E5 Evaporator coil temperature sensor T2 open circuit or short circuit
H 7 times
X EC Refrigerant leakage detection
H 1 time
O F0 Overload current protection
H 2 times
O F1 Outdoor ambient temperature sensor T4 open circuit or short circuit
H 3 times
O F2 Condenser coil temperature sensor T3 open circuit or short circuit
H 4 times
O F3 Compressor discharge temperature sensor T5 open circuit or short circuit
H 5 times
O F4 Outdoor unit EEPROM parameter error
H 6 times
O F5 Outdoor fan speed has been out of control
H 1 time
P0 IPM malfunction or IGBT over-strong current protection
H 2 times
P1 Over voltage or over low voltage protection
H 3 times
P2 High temperature protection of compressor top diagnosis and solution
H 5 times
P4 Inverter compressor drive error
O(light) X(off) H(flash)