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Page Title:
BACK-UP ALARM DOES NOT OPERATE - continued |
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 TM 10-3930-673-20-1
3. BACK-UP ALARM DOES NOT OPERATE (CONT).
18
KNOWN INFO
TEST OPTIONS
Back-up alarm OK.
Continuity test.
Is continuity present on
Wire 21 OK.
STE/ICE-R #91.
wire 21 between
Back-up switch OK.
REASON FOR QUESTION
Wire 20 OK.
connector P1-19 and where
If continuity is not present, wire 21
Circuit breaker CB2 OK.
wire 21 connects to back-up
or connector P1 faulty.
Wire 5 OK.
alarm?
Relay K2 OK.
Wire 3 OK.
Relay K1 OK.
Circuit breaker CB6 OK.
Wire 9 OK.
Connector J2 OK.
Connector P2 OK.
Wire 2 OK.
Connector J1 OK.
Repair wire 21 or
NO
connector P1
POSSIBLE PROBLEMS
(Para 8-49).
Connector P1 faulty.
Wire 21 faulty.
YES
Go to Step 3 of this
fault.
KNOWN INFO
TEST OPTIONS
19
Back-up alarm OK.
Continuity test.
Is continuity present between
Connector J1 OK
REASON FOR QUESTION
Wire 21 OK.
connector J2-1 and wire 9 at
If continuity is not present, wire 9
Back-up switch OK.
circuit breaker CB6?
or connector J2 faulty.
Wire 20 OK.
Circuit breaker CB2 OK.
Wire 5 OK.
Relay K2 OK.
Wire 3 OK.
Relay K1 OK.
Wire 1 OK.
Circuit breaker CB6 OK.
POSSIBLE PROBLEMS
Connector J2 faulty.
Replace wire 9 or
Connector P2 faulty.
NO
connector J2
Wire 9 faulty.
(Para 8-48).
YES
2-82
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