GOLD
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 |
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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
Replace control module. Retest.
•Boiler is in standby.
•Set thermostat to call for heat and recheck
operation.
•Verify Sequence of operation, Figure 18, page 33.
• | Replace control |
| • | Repair/replace |
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| circulator. Retest. |
• | Retest. |
| • | Repair/replace |
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| wiring. Retest. |
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• Wait 5 minutes.
• If you have sufficient heat — boiler should be in normal
operating sequence. (See normal sequence of operation, 
Figure 18, page 33.)
• If you have less than sufficient heat —
Are vent and combustion air piping free of blockage?
No | Yes |
| Is FLAME light on? |
Yes | No |
| Is LIMIT light on? |
No | Yes |
• | Correct conditions and |
| Is manifold pressure: |
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| recheck operation. |
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| 3.50" w.c. on natural gas? | ||||||
• See Figure 18, page 33 |
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| 10.0" w.c. on propane? | |||||||
| for normal sequence of |
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• Check heat loss calculation |
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• | Clock gas input. |
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| • Replace timer relay. | ||||||
•Wait for boiler water to cool to temperature 20 to 30 °F lower than temperature set on limit switch.
Are limit switch contacts closed?
• | Check limit switch |
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| • | Replace control module. | |||||||||
| contacts with continuity |
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| Are limit switch contacts |
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| Check rollout switch | ||||||
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• | Replace rollout switch. |
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No
•Replace limit switch.
•Retest.
Yes
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Figure 18, page 33
•Also check setting on limit switch (should be above 140°F.).
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If rollout thermal fuse element has |
| • | Check any other |
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| limit controls wired | |
opened, determine cause and |
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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. |
| • | Retest. |
Part number
53
