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
1. Heater Does Not Blow
8.
Connect harness connector R-C1
Warm When Tempera-
(WP 0009, Figure 32) to harness
ture Control Panel Is Set
connector P-C3 (WP 0009, Figure
On Maximum Heat - Con-
34).
tinued
9.
Connect harness connector CM-
C1 (WP 0009, Figure 272) to har-
ness connector P-C16 (WP 0009,
Figure 273).
10. Remove water valve actuator
(WP 0009, Figure 270) from water
valve (WP 0294).
11. Connect cab lower wiring harness
harness connector CM-C7 (WP
0009, Figure 271) to water valve
actuator (WP 0009, Figure 270)
(WP 0294).
12. Turn battery disconnect switch
and ignition switch to the ON posi-
tion (TM 5-3805-293-10).
13. Rotate temperature control from
Coolant Shutoff Valve Actuator
coolest setting to warmest setting
Rotates - Replace coolant shutoff
wait approximately 10 seconds
valve (WP 0294).
and then rotate back to coolest
Coolant Shutoff Valve Actuator
setting (TM 5-3805-293-10) while
Does Not Rotate - Replace coolant
observing water valve actuator.
shutoff valve actuator (WP 0294).
Water valve actuator should rotate.
14. Operate machine until engine
reaches normal operating temper-
ature (TM 5-3805-293-10).
15. Turn fan speed switch to maxi-
mum speed (TM 5-3805-293-10).
16. Turn temperature control to the
No Warm Air From Air Vents -
warmest setting and verify warm
Repeat troubleshooting from the
air exiting from air vents.
beginning.
Warm Air From Air Vents - Trouble-
shooting Complete.
0022-9
