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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
Inspection -
(Continued)
5. Terminal
Inspect terminal board (TB1)
a.
Board (TB1)
for dents, breaks, nicks or
and Marker
damaged terminals.
Strip
b. If unrepairable, replace
terminal board.
c. Inspect marker strip for
illegibility or damage.
d . Replace marker strip if
damaged.
Test
Refer to
6. Time Delay
Check coils of relays (Kl,
a.
Relay (K1)
schematic and
K2, K3, K4 and K5) for
wiring diagram
continuity.
(Figures E-1
Heater
b. Actuate the coils of the relays
Relay (K2)
and E-2)
with a 24-volt DC power source.
c. Check for continuity across
Motor Re-
closed contacts and discon-
lay (K3)
tinuity across open contacts.
d . Replace if fails test.
Fan Motor
Relay (K4),
Phase Sequence
Relay (KS)
Refer to
7. Control
Check continuity of control
a.
Circuit
schematic and
circuit breaker in ON and OFF
Breaker
wiring diagram
position.
(Figures E-1
Replace if fails test.
b.
and E-2)
4-58
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