TM 5-3805-290-23-1
TROUBLESHOOTING WITHOUT A DIAGNOSTIC CODE - CONTINUED
0008 00
Table 8. Air Conditioning System Troubleshooting - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. If problem is loose wire on switch or a
(e) Touch two wires on switch
6.
Compressor Will Not
together. Check for proper
loose wire on magnetic clutch, make
Engage. Air Flow to
operation of magnetic clutch.
repairs as needed or replace
Operator's Compartment is
compressor (WP 0192 00).
Warm - Continued.
2. If wires to clutch were damaged,
damaged wires can cause switch to
remain open. Repair damaged wires.
3. After system is charged, operate for a
minimum of 10 minutes (TM 5-3805-
290-10) and perform Performance
Checks for Air Conditioning System
(WP 0018 00) to verify correct
operation of AC system.
4. If problem still exists, go to Test 3.
3. Refer to Table 2, Electrical System
If problem still exists, go to Test 4.
Troubleshooting to check AC control
system (WP 0022 00).
4. Check for lost charge of refrigerant in
1. If capillary tube has no charge or switch
capillary tube.
remains open, problem is in
thermostatic switch, replace switch
(WP 0143 00).
2. After system is charged, operate for a
minimum of 10 minutes (TM 5-3805-
290-10) and perform Performance
Checks for Air Conditioning System
(WP 0018 00) to verify correct
operation of AC system.
N OT E
7.
Compressor Continues to
Cycle or Clutch Will Not
Cause of problem may be one of following conditions: low charge, over-
Disengage. Air Flow to
charge, or evaporator freeze-up.
Operator's Compartment is
Very Cold or Air Flow May
be Restricted Completely at
Times.
1. Check low and high pressure gage
1. If low pressure gage reading is below
during operation of AC (WP 0018 00).
normal and high pressure gage reading
is below normal, go to Test 2.
2. If readings are not as specified, exit this
Malfunction.
