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
6. Check low and high pressure gage
1. If low pressure gage reading is below
2.
Temperature of Air Flow is
during operation of AC.
normal and high pressure gage reading
Warm - Continued.
is above normal, go to Test 7.
2. If low and high pressure gage readings
are too high, go to Test 8.
7. There is air or moisture (water) in
1. The desiccant may be full of moisture.
system.
Recover refrigerant (WP 0225 00) and
replace inline dryer (WP 0224 00).
Evacuate and charge system with
correct amount of refrigerant. Measure
refrigerant by weight (WP 0225 00).
2. 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
Do not operate engine.
With ambient temperature above 21F (70F), normal gage reading
for low pressure side is 10 to 20 psi (70 to 138 kPa) while normal
gage reading for high pressure side is 120 to 190 psi (820 to 1,300
kPa).
The condenser is not functioningproperly. System may have a nor-
mal or overcharge of refrigerant.
8. Check for blockage in flow of air
1. If a blockage is found in condenser,
through condenser.
remove all blockages.
2. If low pressure gage reading and high
pressure gage readings are too high,
recover refrigerant (WP 0225 00) and
replace inline dryer (WP 0224 00).
Evacuate and charge system with
correct amount of refrigerant. Measure
refrigerant by weight (WP 0225 00).
3. 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 00-98