Carrier 42QHF009DS Service Manual page 58

★
X
★ ★
★
X
★
★
★ ★
★ 
★

★
◎
★
X
★

★
X
★ flash at 5Hz,  light,
12.2 Outdoor unit error code explanation:
Display
E0 Outdoor EEPROM malfunction
E2 Indoor / outdoor units communication error
E3 Communication malfunction between IPM board and outdoor main board
E4 Open or short circuit of outdoor unit temperature sensor
E5 Voltage protection
E8 Outdoor fan speed has been out of control
F1 No A Indoor unit coil outlet temperature sensor or connector of sensor is defective
F2 No B Indoor unit coil outlet temperature sensor or connector of sensor is defective
F3 No C Indoor unit coil outlet temperature sensor or connector of sensor is defective
F4 No D Indoor unit coil outlet temperature sensor or connector of sensor is defective
F5 No E Indoor unit coil outlet temperature sensor or connector of sensor is defective
High pressure protection (For 38QUS036DS4)
P1
P2 Low pressure protection (For 38QUS036DS4)
P3 Current protection of compressor
P4 Temperature protection of compressor discharge
P5 High temperature protection of condenser
P6 IPM module protection
Note: Once these error codes display, they will disappear in at least 30 seconds if the unit come back to
normal.(Except E3&E4)
X Indoor / outdoor units communication error
X Indoor EEPROM malfunction
★
IPM module protection
★
Open or short circuit of T3 or T4 temperature sensor

Outdoor unit voltage protection

Outdoor unit over-current protection
X Top temperature protection of compressor
X Inverter compressor drive protection

Mode conflict
★
Indoor fan speed has been out of control

Outdoor fan malfunction
◎ flash at 0.5Hz, X extinguished
LED STATUS
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