Troubleshooting
Problem | Cause | Verification | Solution |
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No heat. | Tripped circuit breaker. | Visually check circuit | Determine cause of tripped |
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| breaker for a tripped condi- | circuit breaker. Then repair |
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| tion. | fault and reset main circuit |
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| breaker. |
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| Low power. | Measure voltage across cir- | 1. If voltage is lower than |
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| cuit breakers. Voltage | expected, use electrical |
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| should measure between | schematic to locate |
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| 190 and 264 Vac. | faulty wiring or connec- |
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| tion. |
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| 2. Have a qualified electri- |
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| cian service electrical |
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| components. |
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| Cable unplugged/loose | Check for loose or discon- | Attach plug/wire. |
| wire. | nected wires and plugs. |
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| Incorrect temperature set | Verify zone has a correct | Enter Setup and enter cor- |
| point. | temperature setting on the | rect temperature. |
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| controller. |
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| Contactor not closing. | Turn on heat for zone A1 | 1. Verify that there are no |
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| and ensure contactor | other error conditions |
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| closes. | that would prevent |
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| heater from starting. |
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| 2. Replace contactor. |
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332511A | 17 |
