Carrier 42HVM109303 Service Manual page 53

9.2.7 High temperature protection of compressor top diagnosis and solution (P2)
9.2.8 Refrigerant Leakage Detection diagnosis and solution(EC)
Shut off the power supply and
turn it on 5 seconds later. Is it
still displaying the error code?
Is there cool air blowing
out from indoor air outlet?
Is there any leakage? Especially
the connection parts, such as the
gas valve and the liquid valve.
Is there any block i n g ? (Such as the
capillary or the welded points of the pipes.)
Clear the blocking.
Yes
No
No
Yes
Check if T2 sensor is well
fixed. Correct the installation
Yes
or replace T2 sensor. Does
the problem remain again?
Replace indoor PCB.
Yes
Repair the leakage and
recharge the refrigerant.
53
Yes