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
4. Refrigerant Compressor
4. Monitor and record low pressure
A/C Performance Test OK - Remove
Will Not Engage - Con-
and high pressure gauges.
A/C Refrigerant Reclaimer. Trouble-
tinued
shooting complete.
A/C Performance Test Not OK -
Repeat troubleshooting from the
beginning.
Test Step 5. Test Refrigerant Pres-
sure Switch Circuits
1. If equipped with arctic heater,
connect machine batteries (WP
0195)
2. Connect rear air conditioning wir-
ing harness connector AW-C1
(WP 0009, Figure 263) to rear
chassis wiring harness connector
FA-C32 (WP 0009, Figure 262)
(WP 0185).
3. Turn battery disconnect switch
and ignition switch to the ON posi-
tion (TM 5-3805-293-10).
4. Disconnect harness connector
AW-C4 (WP 0009, Figure 269)
from refrigerant pressure switch
(WP 0009, Figure 268) (WP
0185).
5. Install a jumper wire between har-
ness connector AW-C9 (WP
0009, Figure 267) terminal 1 and
terminal 2.
6. Using digital multimeter, test for
Voltage Less Than 18 Volts -
voltage between harness connec-
Replace rear air conditioning wiring
tor AW-C4 (WP 0009, Figure 269)
harness (WP 0185).
terminal 1 and machine ground.
Proceed to step 10.
Voltage should be between 18 to 26
Voltage OK - Proceed to step 7.
volts.
7. Turn ignition switch and battery
disconnect switch to the OFF
position (TM 5-3805-293-10).
8. Disconnect rear air conditioning
wiring harness connector AW-C1
(WP 0009, Figure 263) from rear
chassis wiring harness connector
FA-C32 (WP 0009, Figure 262)
(WP 0185).
0022-32
