Carrier 42LUVH025N - Page 38

36
9.2.8 P1(over voltage or too low voltage protection) diagnosis and solution.
9.2.9 P2(temperature protection of compressor top) diagnosis and solution.
Is the power supply
Be sure the power
supply is normal when
NO
YES
Replace the outdoor
e box
YES
Does
Is the
connection
Is refrigerant
circulation
NO
NO
Charge
Is
abnormality
NO
Check refrigerant system
(such as clogging of
Reconnect and retest.
NO
YES
Is protector
normal?
Replace the protector.
NO
YES
Check the
outdoor main
Replace the outdoor
PCB
YES