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Table 3-1. ORGANIZATIONAL PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) (Continued) - 506780053
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TM-5-4120-359-14 Air Conditioner Split Package 18 000 BTU/HR Cooling 30 000 BTU/HR Heating 208 Volt 3 Phase 400 Hertz Manual
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Table 3-2. TROUBLESHOOTING - 506780055
TM 5-4120-359-14
Section IV TROUBLESHOOTING
3-9. GENERAL
Troubleshooting by organizational maintenance is limited to checking operation of the air conditioner. Any failure in
performance or suspected problem, other than those described in table 3-2, should be reported to direct support
maintenance.
3-10. USE OF TROUBLESHOOTING TABLE
Table 3-2 contains troubleshooting information useful to organizational maintenance technicians in diagnosing and
correcting malfunctions or unsatisfactory operation of the air conditioner.
a. The troubleshooting table lists the common malfunction symptoms and unsatisfactory performance characteristics
that technicians are most likely to encounter; test and inspection steps to be followed to determine the cause; and the
corrective action(s) that should be performed for each possible cause are listed.
b. The technician should first find the malfunction symptom or unsatisfactory performance characteristic in the table
which most closely describes the immediate situation; then perform the test and inspections, and corrective action steps in
the order in which they are listed.
Table 3-2. TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
AIR CONDITIONER WILL NOT START IN ANY MODE.
Step 1.
Press run indicator light if light illuminates contact direct support.
Step 2.
Check to see if air conditioner power circuit breaker in shelter has been turned off or tripped.
Reset circuit breaker.
Step 3.
Check to see if power cable to air conditioner has been disconnected.
Connect power cable.
Step 4.
Check to see if remote control cable has been disconnected.
Connect remote control cable.
CAUTION
Provided that military operational considerations allow the time, it is desirable, if
the power has been disconnected for an unknown period of time, to wait six hours
after reconnection before starting in the COOL mode. (See the caution in table 3-1,
2.
INSUFFICIENT COOLING.
Step 1.
Check to see that MODE SELECTOR SWITCH is properly positioned.
Set switch to COOL
Step 2.
Check to see that TEMPERATURE CONTROL is set to COOLER position.
Set TEMPERATURE CONTROL to COOLER position.
Step 3.
Inspect fresh and return air filters, for dirt or blockage.
Clean filter/remove blockage.
3-20 Change 1

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