TM 5-3805-293-23-2
0022
Table 1. Cab Heating, Air Conditioning, and 12 Volt Power Inverter Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. Air Conditioning Does
Test Step 5. Low Pressure Gauge is
Not Blow Cold When A/C
Above Normal, and High Pressure
Is Turned On and Tem-
Gauge is Below Normal.
perature Control Is Set
1. Verify low pressure gauge and
Low Pressure Gauge and High
To Maximum Cool - Con-
Pressure Gauge Are the Same
high pressure gauge are the
tinued
Pressure - Refrigerant compressor is
same pressures.
not engaging, perform Refrigerant
Compressor Will Not Engage in this
work package.
Low Pressure Gauge and High
Pressure Gauge Are Not the Same
Pressure - Replace A/C compressor
(WP 0096).
Proceed to Test Step 11.
Test Step 6. Low Pressure Gauge is
Below Normal, and High Pressure
Gauge is Above Normal
1. Orifice tube or receiver/dryer is
Replace Orifice Tube and Receiver/
damaged or restricted.
dryer - (WP 0296).
Proceed to Test Step 11.
Test Step 7. Low Pressure Gauge
and High Pressure Gauge are Both
Below Normal.
1. Test A/C system for leaks (WP
No Leaks Found - Air is in the A/C
0295).
system. Evacuate and recharge A/C
system (WP 0295).
Proceed to Test Step 11.
Leaks Found - Repair or replace
leaking AC component (WP 0295).
Proceed to Test Step 11.
Test Step 8. Low Pressure Gauge is
Normal and High Pressure Gauge
is Above Normal.
1. High pressure hose is restricted
Replace High Pressure A/C Hose
(WP 0296).
Proceed to Test Step 11.
Test Step 9. Low Pressure Gauge is
Normal and High Pressure Gauge
is Below Normal.
1. Low pressure hose is restricted.
Replace Low Pressure A/C Hose
(WP 0296).
Proceed to Test Step 11.
0022-13
