TM 10-5410-228-24
14. NO POWER TO SYSTEM WITH `EXT' POWER APPLIED Continued.
1
2
Turn power off.
Is
Connect cable assembly 1A4W13 plug P1
Yes
to J3.
present?
Gain access to converter per para 2.13.20.
Remove cable assembly 1A4W9 connector
plug P2 from connector J2 at the rear of the
No
converter.
Apply system power.
Repair or replace cable
Measure for 208 Vac between sockets A &
assembly 1A4W13 per
B and B & C of connector.
No
Is 208 Vac present?
Yes
Turn system power off.
Connect cable assembly 1A4W9 plug P2 to J2.
Gain access to rear of pan assembly per para 2.13.25.
Remove cable assembly 1A4W10 connector plug P1
from J10 connector on the rear of the control panel.
Apply power to system. Turn converter AC input to
ON and DC output to ON.
Test for 24 Vdc between sockets A and B of the
connector P1.
Turn power off.
Gain access to inside of control panel per
Yes
Is 24 Vdc present?
Do continuity check of electrical wiring
from 1A4J7-A to 1A4S1-A3, 1A4J7-B to
1A4S1-A7 & 1A4J7-C to 1A4S1-A11 per
No
3
Repair wiring as required.
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