TM 5-2420-231-23-1
0030
Table 1. Heating and A/C Troubleshooting Procedures - Continued.
030
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. A/C Does Not Blow Cold
3. Inspect A/C lines (Figure 24, Items
Receiver/Dryer OK - Air or moisture is
Air When A/C
1 and 2) and receiver/dryer (Figure
in A/C system.
Temperature Control Is
24, Item 3) for frost, and check
Evacuate A/C system (WP 0364) and
Set to Maximum Cold -
whether A/C lines are cool.
replace A/C receiver/dryer (WP 0365).
Continued
Proceed to Test Step 9.
Receiver/Dryer Frosted or Cool to
the Touch - A/C receiver/dryer is
restricted. Replace A/C receiver/dryer
(WP 0365).
Proceed to Test Step 9.
Figure 24. A/C Receiver/Dryer.
0030
Test Step 8. Low-Pressure Gauge
Reading Is Normal (or Just Above
Normal), and High-Pressure Gauge
Reading Is Above Normal.
1. Verify A/C compressor operation
A/C Compressor Engages or Cycles
as recorded in Test Step 4.
Rapidly - Proceed to step 2.
A/C Compressor Has Long Periods
Between Cycle-On Times - A/C
expansion valve is restricted. Replace
A/C expansion valve (WP 0358).
Proceed to Test Step 9.
2. Evacuate the A/C system (WP
0364).
