Carrier 42QHF012DS - Troubleshooting

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12.Troubleshooting
12.1 Indoor unit error code explanation:
HIWALL (42QHF009DS, 42QHF012DS, 42QHF018DS)
Display
Operation lamp flash times
Timer lamp
Failure
E0
1
X
Indoor EEPROM malfunction
E1
2
X
Indoor / outdoor units communication error
E3
4
X
Indoor fan speed has been out of control
E4
5
X
Open or short circuit of T1 temperature sensor
E5
6
X
Open or short circuit of T2 temperature sensor
F1
2
O
Open or short circuit of T4 temperature sensor
F2
3
O
Open or short circuit of T3 temperature sensor
F3
4
O
Open or short circuit of T5 temperature sensor
F4
5
O
Outdoor EEPROM parameter error
F5
6
O
Outdoor fan speed out of control
F6
7
O
Open or short circuit of T2B temperature sensor
P0
1
☆
IPM module protection
P1
2
☆
Voltage protection
P4
5
☆
Inverter compressor drive protection
P5
6
☆
Mode conflict
P6
7
☆
Low pressure protection(Just matching with
38QUS036DS4)
O （light） X （off） ☆ （flash）
Light Commercial series (Cassette/Duct)
NO.
MALFUNCTION
RUN
Timer
DEF
Alarm
DISPLAY
DIGITAL TUBE
1
Open or short circuit of T1 temperature sensor
☆
X
X
X
E0
2
Open or short circuit of T2 temperature sensor
X
X
☆
X
E1
3
Indoor / outdoor units communication error
X
☆
X
X
E2
4
Full-water malfunction
X
X
X
☆
E3
5
Indoor EEPROM malfunction
☆
☆
X
X
E4
6
IPM module protection
☆
X
X
O
E5
7
Open or short circuit of T3 or T4 temperature sensor or
Outdoor EEPROM malfunction
☆
O
X
X
E6
8
Outdoor fan speed has been out of control
☆
O
☆
X
E7
9
Indoor fan speed has been out of control
☆
O
O
X
F5
10
Voltage protection
☆
O
X
O
P0
11
Outdoor unit over-current protection
☆
☆
☆
X
P2
12
Inverter compressor drive protection
☆
◎
X
X
P4
13
Mode conflict
☆
X
O
O
P5
☆ Flash(at 2.5Hz) ◎ Flash(at 0.5Hz) O light X（off）
Note: Digital display is only available for duct type.
Console series:
Operation
Timer
De-frost
LED STATUS
★
X
X
Open or short circuit of T1 temperature sensor
X
X
★
Open or short circuit of T2 temperature sensor