Carrier 42KCR009713 - Page 64

Service manual
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10.6 Temperature sensor error.
Including the indoor room, indoor evaporator and outdoor condenser temperature sensor.
Is connector connection good?
Replace the sencor,
No
Repair the connector.
10.7 Outdoor unit protects
10.8 EEROM error
EEROM error, indoor PCB is defective, change indoor PCB or change EEPROM if it’s changeable.
10.9 Indoor unit communication error.
Check the if the signal wire is well connection
Change indoor PCB and check if the error is still
exit
Connect the signal wire well or change
the signal wire if it’s the problem of the
wires.
No
Ye
s
Indoor PCB failure
No
Outdoor PCB failure, change outdoor PCB
oC
Check if the power supply is good
Change outdoor PCB and check if the error is still
exit
Power supply failure
No
Yes
Outdoor PCB failure
No
Yes
mpressor failure