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TM5-4120-375-14
Table 4-2.
TROUBLESHOOTING (cont.)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
COOLING MODE
2.
COMPRESSOR FAILS TO START.
Step 1.
Loosen eight turnlock fasteners on maintenance panel.
Remove maintenance panel.
Step 2.
Check
open.
Place circuit breaker in the ON position. If
the air conditioner will not operate in the
COOL position, check for a defective circuit
breaker in accordance with paragraph 4-22.
Replace defective circuit breaker in
accordance with paragraph 4-22.
to see if dual pressure switch contacts are
Push reset button at the dual pressure switch.
If compressor does not start, stop air
conditioner. Notify Direct Support Maintenance.
WARNING
Be careful when working with high voltage.
Failure to comply can
result in serious injury or death.
Step 3.
Check to see that selector switch is in COOL
position.
Place selector switch in COOL position.
If the
air conditioner will NOT operate check for a
defective switch in accordance with paragraph
4-16.
Replace defective switch in accordance with
paragraph 4-16.
4-14
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