Weil-McLain GOLD CGa Manual page 54

GOLD CGa Gas-Fired Water Boiler — Boiler Manual
11c
Troubleshooting — spark-pilot boilers
CHART 2 — Spark-ignited pilot — Troubleshooting POWER light status
— Usually indicates reversed 120 VAC polarity if POWER light flashes by itself —
Electrical shock hazard — Wherever you see
instructions could result in severe personal injury, death or substantial property damage.
Is POWER light off?
No
Is POWER light...
Flashing
alone
TSTAT CIRC
light flashing
DAMPER
light flashing
FLAME
light flashing
For insufficient heat or no heat problem, go to
Chart 7, page 59, if POWER light is on steady,
with no other 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 light flashing now?
No
Boiler should now
operate normally.
54
Yes
On steady
Flashing with
another light (not flashing)
Chart
3
Chart
4
Chart Chart
5 6
at service switch or breaker,
Yes
Have system checked by a
licensed electricain.
If problem persists, call your
local Weil-McLain sales
representative.
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.
(continued)
Yes
Yes
Yes
Replace control module.
Retest.
Part Number 550-101-009/0107