TM 9-4120-402-14
Section V UNIT TROUBLESHOOTING
4-8.
USE OF TROUBLESHOOTING TABLE.
Table 4-3 contains troubleshooting information useful to
unit maintenance technicians in
diagnosing and correcting
malfunctions or unsatisfactory operation of the air conditioner.
a.
The table lists the common malfunctions which you may find during the operation or maintenance of the air
conditioner or its components. You should perform the test/inspection and corrective actions in the order listed.
b.
This manual cannot list all malfunctions that may occur, nor all testsroinspections and corrective actions.
If a malfunction is not listed or is not corrected by listed corrective actions, notify supervisor.
SYMPTOM INDEX
Trouble
Malfunction No.
AIR CONDITIONER
Does Not Start In Any Mode..........................................................
1
Reduced Cooling Capacity............................................................
.
5
Reduced Heating Capacity............................................................
6
No Heat In Heat Mode ..................................................................
7
Excessively Noisy Operation ........................................................
9
Fan Motor (B2) Does Not Operate.................................................
8
Fan Motor (B2) Does Not Operate.................................................
8
COMPRESSOR
Fan Runs But Compressor Does Not Start ....................................
2
Compressor Starts Normally, But Soon Stops...............................
3
Compressor Starts Normally, But High Pressure Cutout Switch Trips 4
4-37