Weil-McLain CGi 4 Series Manual page 59

CGi
SERIES 4 — GAS-FIRED WATER BOILER —
11c
Troubleshooting — control module lights
CHART 7 ––
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 boiler pressurized?
Yes
• Pressurize boiler to system design pressure.
• System was low on water.
• Check system fill piping for
leaks or damage.
Part Number 550-142-302/0124
Boiler Manual
Troubleshooting LWCO and POWER light Solid
and/or "LCO" shown on display
No
Are lights still solid?
No Yes
• LWCO sensor is bad or fouled.
• Clean LWCO sensor
• Retest.
Are lights still solid?
No
• Sensor was fouled.
• Check water quality and
maintenance schedule.
• Check system for leaks.
Is system leaking or not
maintaining pressure?
No
• System is losing
• Repair leak and retest.
Yes
• Sensor is bad. Replace sen-
sor.
• Retest.
(cont.)
Yes
water.
59