TM 5-3805-291-23-1
TROUBLESHOOTING WITHOUT A DIAGNOSTIC CODE - CONTINUED
0008 00
Table 8. AC System Troubleshooting - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
12. The system has air or moisture and does 1. Recover refrigerant (WP 0225 00) and
1. Temperature of Air Flow is
repair leaks.
not have a full charge of refrigerant.
Partially Cool - Continued.
Perform Refrigerant Leakage Test (WP 2. If a large amount of refrigerant was
lost, perform Refrigerant Compressor
0018 00) to determine location of leak.
Oil Check (WP 0018 00).
3. Evacuate system and re-charge system
with correct amount of refrigerant (WP
0225 00).
4. After system is charged, operate for a
minimum of 10 minutes (TM 5-3805-
291-10) and perform Performance
Checks for AC System (WP 0018 00) to
verify correct operation of AC system.
N OT E
Compressor has internal leaks.
Read valve has leakage.
Compressor piston, rings, or cylinders are worn.
13. Check drive belt for damage or
If belt is loose or damaged, replace belt
looseness.
tensioner (WP 0047 00) or belt (WP 0048
00) as necessary.
14. Perform Refrigerant Leakage Test (WP 1. If an internal leak is found, replace
0018 00) to isolate problem.
compressor (WP 0221 00). Replace in-
line dryer (WP 0224 00).
2. If an external leak such as a hose
connection is found, recover
refrigerant (WP 0225 00) and repair
leaks.
3. Evacuate and charge system with
correct amount of refrigerant. Measure
refrigerant by weight (WP 0225 00).
4. If a large amount of refrigerant was
lost, perform Refrigerant Compressor
Oil Check (WP 0018 00).
5. After system is charged, operate for a
minimum of 10 minutes (TM 5-3805-
291-10) and perform Performance
Checks for AC System (WP 0018 00) to
verify correct operation of AC system.
0008 00-96