Airport Systems
Flashhead stuck in
Day Mode
Is DB DS3 | No | ||
green LED |
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steady off? |
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| Yes |
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Are Comm | No | ||
wires correctly | |||
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wired in FH |
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TB1? 1 |
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| Yes |
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Are Comm | No | ||
wires correctly | |||
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wired in MC |
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TB5? 2 |
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| Yes |
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Remove all power from FH and MC.
Perform Comm Wiring
tests (Installation Check3, and
Will FH
operate in No other modes 
with manual selection?
Yes
Correct wiring.
Correct wiring.
Did wires pass | No | ||
isolation and |
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continuity |
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checks? |
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| Yes |
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Replace Digital |
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Board. |
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Check if problem is resolved after each step taken.
1.Replace Digital Board.
2.Check for loose connections to coil of FH K2 Relay
3.Replace FH K2 relay.
Check for loose mounting nuts on FH switch assembly. Make sure FH Remote/Local interlock is pressed when door latched.
Locate and repair break.
1Per Section 2.4.2
2Per Section 2.4.5
3Per Section 2.5.4
4Per page
Figure 4-3: General Troubleshooting – Flashhead Stuck in Day Mode
Manual |