Troubleshooting - Weil-McLain GOLD CGa Installation And Maintenance Manual

GOLD
11c

Troubleshooting

Chart 2 — Spark-ignited pilot — Troubleshooting POWER light status
— Usually indicates reversed 120 VAC polarity if
Electrical shock hazard — Wherever you see
instructions could result in severe personal injury, death or substantial property damage.
Is POWER
No
Is POWER
Flashing
alone
TSTAT CIRC
light flashing
DAMPER
light flashing
FLAME
light flashing
For insufficient heat or no heat problem, go to
Chart 7 if POWER
light flashing.
• Usually indicates polarity on incoming 120 VAC power
line is wrong.
▲TURN OFF POWER▲
•
then reverse the HOT and NEUTRAL wires entering
the boiler in the J-box.
• Restore POWER at service switch or breaker.
Is POWER
No
Boiler should now
operate normally.
54
CGa Gas-Fired Water Boiler
light off?
Yes
light...
Flashing with On steady
(not flashing)
another light
Chart
3
Chart
4
Chart Chart
5 6
light is on steady, with no other
at service switch or breaker,
light flashing now?
Yes
Have system checked by a
licensed electricain.
If problem persists, call your
local Weil-McLain sales
representative.
— spark-ignited pilot boilers
POWER light flashes by itself —
▲TURN OFF
POWER▲, follow the instructions. Failure to follow
• Make sure service switch or circuit breaker is on or
fuses are good.
• Remove 120 VAC IN plug (Figure 30, Item 3, page
53) on control module.
• Using voltmeter, check across top and bottom pins
of 120 VAC IN plug.
Does voltmeter indicate 120 VAC?
No
Problem is with incoming
electricity. Have licensed
electrician repair circuit.
• Reconnect 120 VAC IN plug.
• Remove 120 VAC transformer PRIMARY plug
(Figure 30, Item 2, page 53) on control module.
• Using voltmeter, check across top and bottom pins
of PRIMARY receptacle.
Does voltmeter indicate 120 VAC?
No
Replace control module.
Retest.
• Reinstall 120 VAC transformer PRIMARY plug.
• Remove 24 VAC transformer plug (Figure 30, Item 5,
page 53) on control module.
• Using voltmeter, check across pins of receptacle.
Does voltmeter indicate 120 VAC?
No
Replace transformer.
Retest.
Yes
Yes
Yes
Replace control module.
Retest.
Part Number 550-110-593/1099