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TM5-4120-387-14
TABLE 4-2. TROUBLESHOOTING (Cont.)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 2.
Check operation of mode selector switch.
Turn switch to OFF, then reset to COOL.
NOTE
Allow 30 seconds time delay before compressor starts.
Voltages used can kill.
Always disconnect power cord to
air conditioner before performing any internal
maintenance.
Shutting unit off at its control panel does
not disconnect unit power.
Step 3.
Check for loose or damaged electrical connectors, or damaged wires
in harnesses.
Tighten or replace connectors, or repair damaged wires.
Step 4.
Check operation of time delay relay (K6).
Test relay.
(See para 4-35.)
Step 5.
Check operation of time delay relay (K9).
Test relay.
(See para 4-36.) Replace relay if defective.
Step 6.
Check operation of compressor motor relay (Kl).
Test relay.
(See para 4-37.) Replace relay if defective.
Step 7.
Check operation of circuit breaker (CB) primary contacts.
Test circuit breaker.
(See para 4-32.) Replace circuit breaker
if defective.
Step 8.
Check operation of compressor motor start relay (C4).
Test capacitor.
(See para 4-50.) Replace if defective.
Step 9.
Check operation of armature relay (K1O).
Test relay.
(See para 4-53.) Replace if defective.
4-34
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