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TM5-4120-387-14
TABLE 4-2. TROUBLESHOOTING
MALFUNCT ION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
AIR CONDITIONER DOES NOT START IN ANY MODE.
Step 1.
Check to see if input power has been disconnected.
e phase, 50/60 hertz.
Step 3.
Check to see if compressor circuit breaker is tripped.
Slowly PULL out AND PUSH in reset knob TO RESET Circuit Breaker.
Step 4.
Check for loose or damaged electrical connectors or damaged wires in
wiring harnesses.
(See para 4-43.)
Tighten or replace connectors, or repair damaged wires.
Step 5.
Check fuses.
(See para 4-33.)
Replace bad fuse(s).
Step 6.
Check operation of the auxiliary switch in circuit breaker (CB)
Test (CB1) auxiliary switch.
(See para 4-32.) Replace circuit
breaker if auxiliary switch is defective.
Step 7.
Check operation of control power transformer (T) and capacitor
assembly (C3).
Test transformer and capacitor assembly.
(See para 4-30 and
4-31.) Replace transformer or capacitor assembly, if defective.
Step 8.
Check operation of rectifier (CR).
Test rectifier.
(See para 4-34.) Replace defective rectifier.
Step 9.
Check all terminals and internal wiring within junction box for
tightness and damage.
Tighten terminals, or repair wiring as necessary.
(See
para 4-27.)
4-32
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