Weil-McLain CGA Series 2 Manual page 57

CGa Series 2 Gas-Fired Water Boiler — Boiler Manual
11b
Troubleshooting — spark-pilot boilers
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 harness securely connected to control?
• Ground was improperly connected.
• Boiler should resume operation.
Part Number 550-142-900/0519
Troubleshooting Sensor Ground and POWER light Solid
and/or "LCO" shown on display
Yes No
• Secure connector.
Is the Sensor ground light still solid or flashing?
No
• Control had poor connection,
boiler should resume operation.
• Secure wire to earth ground.
• Retest.
Is the Sensor ground light still solid or
flashing?
No
• Check for stray voltage on ground and
neutral wires.
• Correct incoming power and
grounding issues.
• Check ground continuity from Pin 4 of P5
terminal to ground connection.
Is there continuity?
No
• Check and secure ground source to
earth ground connection.
Is the Sensor ground light still solid or
Yes
Yes No
• Replace control.
Yes
Yes
flashing?
Yes No
(continued)
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