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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).
8
KNOWN INFO
TEST OPTIONS
Back-up alarm OK.
Voltage test.
Is 24 vdc present at relay K1
Connector J1 OK.
STE/ICE-R 89.
(run relay) where wire 3
Connector P1 OK.
REASON FOR QUESTION
connects?
Wire 21 OK.
If 24 vdc is present, wire 3 faulty.
Back-up switch OK.
Wire 20 OK.
Circuit breaker CB2 OK.
Wire 5 OK.
Relay K2 OK.
POSSIBLE PROBLEMS
Wire 3 faulty.
Run relay K1 faulty.
Wire 1 faulty.
Circuit breaker CB6 faulty.
Go to Step 9 of this
NO
Wire 9 faulty.
fault.
Connector J2 faulty.
Connector P2 faulty.
YES
Repair wire 3 (Para
8-48).
9
KNOWN INFO
TEST OPTIONS
Back-up alarm OK.
Voltage test.
Is 24 vdc present at relay K1
Connector J1 OK.
STE/ICE-R 89.
where wire 1 connects?
Connector P1 OK.
REASON FOR QUESTION
Wire 21 OK.
If 24 vdc is present, relay K1 faulty.
Back-up switch OK.
Wire 20 OK.
Circuit breaker CB2 OK.
Wire 5 OK.
Relay K2 OK.
Wire 3 OK.
POSSIBLE PROBLEMS
Run relay K1 faulty.
Wire 1 faulty.
Circuit breaker CB6 faulty.
Go to Step 10 of
NO
Wire 9 faulty.
this fault.
Connector J2 faulty.
Connector P2 faulty.
YES
Replace relay K1
(Para 8-23).
2-72
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