Weil-McLain Gold CGi 2 Series Manual page 51

CGi
GOLD GAS-FIRED WATER BOILER — SERIES 2 —
11c
Troubleshooting — control module lights
— Usually indicates reversed 120 VAC polarity if POWER light flashes by itself —
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.
Is
No
Is
Flashing
alone
TSTAT CIRC
light flashing
PRESS SWITCH
light flashing
FLAME
light flashing
For insufficient heat or no heat problem, go to
Chart 7 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▲ at service switch or breaker,
then reverse the HOT and NEUTRAL wires entering the
boiler in the J-box.
• Restore POWER at service switch or breaker.
Is
No
Boiler should now
operate normally.
Part Number 550-110-710/1211
CHART 1 — Troubleshooting POWER light status
light off?
Yes
light ...
On steady
Flashing with
another light (not flashing)
Chart
2
Chart Chart
3 5
Chart Chart
4 6
light flashing now?
Yes
Have system checked by a
licensed electrician. If
problem persists, call your
local Weil-McLain sales
representative.
Boiler Manual
• Make sure service switch or circuit breaker is on or
fuses are good.
• Remove 120 VAC IN plug (Figure 38, Item 3,
page 50) on control module.
• Using voltmeter, check across top and bottom pins of
120 VAC IN plug.
Does voltmeter indicate
No
Problem is with incoming
electricity. Have licensed
electrician repair circuit.
• Reconnect 120 VAC IN plug.
• Remove 120 VAC IN transformer PRIMARY plug
(Figure 38, Item 2, page 50) on control module.
• Using voltmeter, check across top and bottom pins of
PRIMARY receptacle.
Does voltmeter indicate
No
Replace control module.
Retest.
• Reinstall 120 VAC transformer PRIMARY plug.
• Remove 24 VAC transformer plug (Figure 38, Item
5, page 50) on control module.
• Using voltmeter, check pins of plug.
Does voltmeter indicate
No
Replace transformer.
Retest and check for back
feed of voltage from
system wiring.
?
Yes
?
Yes
?
Yes
Replace control module.
Retest.
51