GOLD CGs 
11d Troubleshooting — control module lights (cont.)
CHART 4 — FLAME & POWER lights flashing
— Usually indicates flame sensed when it shouldn't be there —
Electrical shock hazard — Wherever you see TURN OFF POWER , follow the instructions. Failure to follow instructions could result in severe personal injury, death or substantial property damage.
Are manual main shutoff valve and gas valve open?
No
Yes
•Leave main manual gas valve closed.
•Turn off power to boiler at service switch or breaker.
•Wait at least 45 seconds.
•Turn on power to boiler.
•Restart boiler, following Operating instructions in this manual (Section 9c).
Do FLAME and POWER lights still flash?
No |
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• Replace control module.
• Retest.
•Turn off power to the boiler at service switch or breaker.
•Wait at least 45 seconds.
•Turn on power to boiler.
•Restart boiler, following Operating instructions in this manual (Section 9c).
•Look through the pilot inspection port (in front of air inlet box) to see if the pilot is burning during the prepurge period (first 30 seconds of operation).
Is pilot burning during prepurge period?
No |
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• Allow boiler to continue cycling.
Are FLAME & POWER lights flashing?
No |
| Yes | ||
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•Replace gas valve.
•Retest boiler.
Are FLAME and POWER lights flashing?
No |
| Yes | ||
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•TURN OFF POWER to boiler at service switch or breaker.
•Open main manual gas valve.
•Turn on power to boiler at service switch or breaker.
•Restart boiler per lighting instructions.
•Perform
•Boiler may now be operating normally.
•Perform
•Replace control module.
•Retest.
•Boiler should now operate normally.
•Original flashing FLAME light caused by gas valve not operating properly.
•See normal sequence of operation,
Figure 18, page 31.
•Replace control module.
•Retest.
50
Part number
