Carrier 42QHC018DS series - Troubleshooting

64
18 Troubleshooting
18.1 Indoor unit error code explanation:
For Console
Malfunction
Timer Lamp
Operation Lamp
(flashes)
Indoor EEPROM malfunction
X
1
Communication malfunction between indoor and outdoor units
X
2
Indoor fan speed has been out of control
X
4
Open or short circuit of T1 temperature sensor
X
5
Open or short circuit of T2 temperature sensor
X
6
Overcurrent protection (For some units)
O
1
Open or short circuit of T4 temperature sensor
O
2
Open or short circuit of T3 temperature sensor
O
3
Open or short circuit of T5 temperature sensor
O
4
Outdoor EEPROM malfunction (For some units)
O
5
Outdoor fan speed is out of control
O
6
Open or short circuit of T2B temperature sensor (For free-match indoor units)
O
7
IPM module malfunction
☆
1
Over voltage or over low voltage protection
☆
2
Too low ambient temperature protection
☆
4
Inverter compressor drive protection
☆
5
Mode conflict
☆
6
Low pressure protection of compressor
☆
7
O (on) X(off) ☆(flash at 2Hz)
For other type
Malfunction
Error Code
Timer Lamp
Operation Lamp
(flashes)
Indoor EEPROM malfunction
E0
X
1
Communication malfunction between indoor and outdoor units
E1
X
2
Indoor fan speed has been out of control
E3
X
4
Open or short circuit of T1 temperature sensor
E4
X
5
Open or short circuit of T2 temperature sensor
E5
X
6
Water level alarm
EE
X
8
Overcurrent protection (For some units)
F0
O
1
Open or short circuit of T4 temperature sensor
F1
O
2
Open or short circuit of T3 temperature sensor
F2
O
3
Open or short circuit of T5 temperature sensor
F3
O
4
Outdoor EEPROM malfunction (For some units)
F4
O
5
Outdoor fan speed is out of control
F5
O
6
Open or short circuit of T2B temperature sensor (For free-match indoor
units)
F6
O
7
Communication error between auto-lifting panel and slim cassette (For
F7
O
8