GOLD CGs 
11d Troubleshooting — control module lights (cont.)
CHART 7 — Insufficient heat or no heat to system (POWER light on steady)
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.
• Has it been at least 5 minutes since setting thermostat to call for heat? If not, wait 5 minutes. Is system heating?
• Is thermostat set to call for heat? Remove thermostat wires at boiler and check continuity across the two wires. If circuit isn't closed, check external thermostat (zone valve, relay, etc.) wiring. Correct problems and retry.
• Reconnect external thermostat wiring at boiler.
Is thermostat circuit closed (continuity across wires)?
No |
| Yes |
Is boiler System circulator operating?
No | Yes |
•Remove CIRCULATOR harness plug from CIRCULATOR plug receptacle (Figure 25, Item 7, page 46). Check with voltmeter across pins of control module receptacle.
Does voltmeter show 120 VAC across pins?
No | Yes |
Are all red lights off?
No | Yes |
Wait 30 seconds. Are all red lights off?
No | Yes |
•Boiler is in standby.
•Set thermostat to call for heat and recheck
operation.
•Verify Sequence of operation, Figure 18, page 31.
• | Replace control |
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| circulator. Retest. |
• | Retest. |
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| wiring. Retest. |
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• Wait 5 minutes.
Is FLAME light on? |
Replace control module. Retest.
Yes |
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•If you have sufficient heat — boiler should be in normal operating sequence. (See normal sequence of operation, Figure 18, page 31.)
•If you have less than sufficient heat —
Is vent or combustion air piping free of blockage?
No |
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• Correct conditions and |
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recheck operation. |
| sales representative. | ||
•See Figure 18, page 31 for normal sequence of operation.
•Wait for boiler water to cool to temperature 20 to 30 °F
lower than temperature set on limit switch.
Are limit switch contacts closed?
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| • Boiler water temperature exceeded | |||
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| setting on limit switch with thermostat | |||
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• | Replace |
| calling for heat. Boiler is OK. (See normal | ||||
| sequence of operation, Figure 18, p. 31.) | ||||||
| limit switch. |
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• | Retest. |
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Is LIMIT light on?
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• | Check limit switch |
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| • | Replace control module. | |||||||||||||||
| contacts with continuity |
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| checker. |
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| Are limit switch contacts |
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• | Replace rollout switch. |
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| • | Check any other | ||||
If rollout thermal fuse element has |
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| limit controls wired | ||||||||||||||||
opened, determine cause and |
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| into the limit | |||||||||||||||
correct condition. Failure to do so |
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| circuit. If all are | ||||||||||||||||
will cause severe personal injury, |
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| OK, then replace | ||||||||||||||||
death or substantial property |
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| control module. | |||||||||||||||
damage. |
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| • | Retest. | |||||||||||
Part number
53
