Honeywell SG-60 General Troubleshooting All Flashheads Stuck in Day Mode

Airport Systems

All Flashheads stuck

in Day Mode

Are any LEDs		No
on Master
Controller lit?
	Yes
Does MC
show Green
FH Status		Yes
LEDs?
	No

Replace MC Fuse F1.

Does MC	Yes
show Green
PC OK LED
(DS28?)
No

Troubleshoot Flashheads Individually.

Check Photocell Wiring.

If wiring OK, replace Photocell.

Is Master

Controller No

COM OK LED

lit? (DS34)

Yes

No	Is Master	Yes
	Controller
Unplug MC TB5
	COM OK LED
	lit? (DS34)
	No

Check for shorts between communication cable and power wiring.

Is Comm

Cable wired to

MC TB5

correctly1?

	Yes
Perform		No
Comm Wiring
Tests2. Is
wiring OK?
	Yes

	Visually examine MC for damage near TB5.
	If damaged, replace Master Controller PC Board.
Correct wiring.
	Otherwise, replace Master Controller chip U2.

Make sure only a single (a top-level) Flashhead has SW4-1 (TERM) set to on. Check for shorts or breaks in the communication cable.

Troubleshoot each Flashhead individually.

1Per Section 2.4.2

2Per Section 2.5.4 and page 4-2

Figure 4-1: General Troubleshooting – All Flashheads Stuck in Day Mode

SG-60 High Intensity Strobe System 4-3 Manual EPM-00000019 Rev A