Carrier 38MGQ - Diagnostic Guides; Indoor Unit Error Codes; Outdoor Unit Error Codes

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Table 25—Indoor Unit Error Display
OPERATION
LAMP
TIMER LAMP DISPLAY LED STATUS
☆1time
X E0 Indoor unit EEPROM error
☆ 2times X E1 Communication malfunction between indoor and outdoor units.
☆4times X E3 Indoor fan speed has been out of control
☆5times X E4 Indoor room temperature sensor T1 open circuit or short circuit
☆6times X E5 Evaporator coil temperature sensor T2 open circuit or short circuit
☆7times X EC Refrigerant leakage detection
☆8times X EE Water --- level alarm malfunction
☆1time O F0 Current overload protection
☆2times O F1 Open circuit or short circuit of outdoor ambient temperature sensor T4
☆3times O F2 Open circuit or short circuit of condenser coil temperature sensor T3
☆4times O F3 Open circuit or short circuit of Compressor discharge temperature sensor T5
☆5times O F4 Outdoor unit EEPROM error
☆6times O F5 Outdoor fan speed has been out of control
☆7times O F6 T2B sensor error
☆8times O F7 Lifting---panel communication error
☆9times O F8 Lifting--- panel malfunction
☆10 times O F9 Lifting--- panel is not closed
☆1time ☆ P0 IPM malfunction
☆2times ☆ P1 Over voltage or over low voltage protection
☆3times ☆ P2 High temperature protection of compressor top
☆4times ☆ P3 Outdoor low temperature protection
☆5times ☆ P4 Inverter compressor drive error
☆6times ☆ P5 Mode conflict
☆7times ☆ P6 Compressor low--- pressure protection
☆8times ☆ P7 Outdoor IGBT temperature sensor error
O (light) X (off) ☆ (flash)
OUTDOOR UNIT DIAGNOSTIC GUIDES
This unit has on--board diagnostics. Error codes are displayed on the wired remote controller and the outdoor unit microprocessor board with
colored LED lights. The table below explains the error codes on both.
Table 26—Outdoor Unit Error Display
DISPLAY LED STATUS IDU E rror IDU Error
E0 Outdoor EEPROM malfunction F4 E6
E2 Communication malfunction between indoor and outdoor units E1 E2
E3 Communication malfunction between IPM board and outdoor main board —— ——
E4 Open or short circuit of outdoor temperature sensor (T3、T4、T5、T2B) F2 E6
E5 Voltage protection P1 P0
E6 PFC module protection —— ——
E8 Outdoor fan speed has been out of control (Only for DC fan motor models) F5 ——
E9 Wrong wiring connection of 24K indoor unit —— ——
F1 No A Indoor unit coil outlet temp. sensor or connector of sensor is defective —— ——
F2 No B Indoor unit coil outlet temp. sensor or connector of sensor is defective —— ——
F3 No C Indoor unit coil outlet temp. sensor or connector of sensor is defective —— ——
F4 No D Indoor unit coil outlet temp. sensor or connector of sensor is defective —— ——
F5 No E Indoor unit coil outlet temp. sensor or connector of sensor is defective —— ——
F6 No F Indoor unit coil outlet temp. sensor or connector of sensor is defective —— ——
P0 Temperature protection of compressor top P2 P3(P1)
P1 High pressure protection —— ——
P2 Low pressure protection —— ——
P3 Current protection of compressor —— ——(P2)
P4 Temperature protection of compressor discharge —— ——
P5 High temperature protection of condenser —— ——
P6 IPM module protection P0 E5