Weil-McLain GOLD CGt Manual page 50

GOLD CGt Gas-Fired Water Boiler — Boiler Manual
11c
Troubleshooting — control module lights
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.
• 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 (Figure 30, page 36).
Do FLAME and POWER lights still flash?
No
• ▲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 start-up
procedures in boiler
manual to verify proper
operation.
50
CHART 4 — FLAME & POWER lights flashing
— Usually indicates flame sensed when it shouldn't be there —
Are manual main shutoff valve and gas valve open?
No
Yes
• Replace control module.
• Retest.
• Allow boiler to continue cycling.
Are FLAME & POWER lights flashing?
No
• Boiler may now be • Replace control
operating
normally.
• Retest.
• Perform start-up
procedures in
boiler manual to
verify proper
operation.
• 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 (Figure 30, page 36).
• Look through the pilot inspection port to see if the pilot is
burning during the prepurge period (first 10 seconds of
operation).
Is pilot burning during prepurge period?
No
• Replace gas valve.
• Retest boiler.
Are FLAME and POWER lights flashing?
Yes
• Boiler should now
module. operate normally.
• Original flashing
FLAME light
caused by gas
valve not
operating
properly.
• See normal
sequence of
operation,
Figure 28,
page 34.
(continued)
Yes
Yes
No Yes
• Replace control
module.
• Retest.
Part Number 550-110-290/0501