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Page Title:
JUNCTION BOX-Continued. |
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 TM 5-4120-386-14
4-25. JUNCTION BOX-Continued.
REMARKS
LOCATION/ITEM
ACTION
Removal-
(Continued)
Most repairs
1. Junction
It is not necessary to remove
c.
and replace-
Box-
junction box completely from
ments can be
unit.
(Continued)
made without
removing junc-
tion box com-
pletely.
Inspection
Inspect junction box for
2. Junction
a.
Box
damage.
b.
Inspect all designation part
markings for illegibility.
Inspect all designation plates
c.
and instruction plates for
damage and illegibility.
Replace damaged designation
d.
markings, instruction plates
and designation plates.
Replace junction box if damaged
e.
enough to prevent normal opera-
tion of air conditioner.
Inspect relays for any external
a.
3. Time Delay
damage to housing or contacts.
Relay (K1)
b. If damaged enough to prevent
Heater
normal operation of relay,
Relay (K2)
replace relay.
Motor Relay
(K3) Condenser
Fan Motor
Relay (K4),
Phase Sequence
Relay (KS)
Inspect control circuit breaker
4. Control
a.
(33) for external damage.
Circuit
Breaker
b. Inspect toggle for distinct
click and engagement of switch
(CB2)
when placed in ON or OFF positions.
c . Inspect contacts for damage.
d. Replace circuit breaker (33) if
damaged to prevent normal
operation.
4-57
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