Carrier 42QFD048D8S Service Manual page 72

2.
2.1
These error codes are described in the following tables:
Display Error Information
Defrost
F
Self clean
SC
Heating in room temperature under 8°C
FP
Indoor unit EEPROM parameter error
EH 00/EH 0A
Indoor/outdoor unit communication error
EL 01
The indoor fan speed is operating outside of the normal range
EH 03
Outdoor temperature sensor is in open circuit or has short circuited
EC 50
Outdoor unit EEPROM parameter error
EC 51
Condenser coil temperature sensor T3 is in open circuit or has short
EC 52
circuited
Outdoor room temperature sensor T4 is in open circuit or has short
EC 53
circuited
Compressor discharge temperature sensor TP is in open circuit or has
EC 54
short circuited
IGBT temperature sensor TH is in open circuit or has short circuited
EC 55
Evaporator coil outlet temperature sensor T2B is in open circuit or has
EC 56
short circuited(for free-match outdoor units)
Open circuit or short circuit of outdoor temperature sensor or outdoor
EC 05
unit EEPROM parameter error
Indoor room temperature sensor T1 is in open circuit or has short
EH 60
circuited
Evaporator coil middle temperature sensor T2 is in open circuit or has
EH 61
short circuited
The outdoor fan speed is operating outside of the normal range
EC 07
Indoor PCB/Display board communication error
EH 0
Refrigerant leakage detection
EL 0C
 Troubleshooting 4
Solution
TS01-IDU
TS02-L-INV
TS04-L-IDU
TS05-ODU
TS01-ODU
TS05-ODU
TS05-ODU
TS05-ODU
TS05-ODU
TS05-ODU
TS05-L-ODU
TS05-IDU
TS05-IDU
TS04-ODU
TS06-INV

--
--
--
TS07