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| Miswired Module Troubleshooting | |
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| Miswired Module Indication | Recommended Troubleshooting Action |
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| Green LED is not on, | Determine if both R and C module terminals are connected. Verify voltage is present |
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| at module's R and C terminals. Review 24VAC Power Wiring section on page 16 for |
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| module does not power up. |
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| R and C wiring. |
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| Green LED intermittent, | Determine if R and Y terminals are wired in reverse. Verify module's R and C |
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| module powers up only | terminals have a constant source. Review 24VAC Power Wiring section on page 16 |
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| when compressor runs. | for R and C wiring. |
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| TRIP LED is on but system | Verify Y terminal is connected to 24VAC at contactor coil. Verify voltage at contactor |
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| and compressor check OK. | coils falls below 0.5VAC when off. |
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| TRIP LED and ALERT LED | Verify R and C terminals are supplied with |
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| flashing together. |
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| ALERT Flash Code 3 | Verify Y terminal is connected to 24VAC at contactor coil. Verify voltage at contactor |
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| (Compressor Short Cycling) |
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| coil falls below 0.5VAC when off. |
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| displayed incorrectly. |
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| ALERT Flash Code 5, 6, or 7 | Check that compressor run and start wires are through module's current sensing |
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| (Open Circuit, Open Start |
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| holes. Verify Y terminal is connected to 24VAC at contactor coil. Verify voltage at |
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| Circuit, or Open Run Circuit) |
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| contactor coil falls below 0.5VAC when off. |
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| displayed incorrectly. |
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| ALERT Flash Code 6 |
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| (Open Start Circuit) | Check that compressor run and start wires are routed through correct module |
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| displayed for Code 7 |
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| sensing holes. |
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| (Open Run Circuit |
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| or vice versa. |
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| ALERT Flash Code 8 | Determine if module's Y terminal is connected. Verify Y terminal is connected to 24VAC at |
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| contactor coil. Verify 24VAC is present across Y and C when thermostat demand signal is |
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| (Welded Contactor) |
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| present. If not, R and C are reverse wired. Verify voltage at contactor coil falls below |
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| displayed incorrectly. |
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| 0.5VAC when off. Review Thermostat Demand Wiring on page 16 for Y and C wiring. |
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| Table 11 | |
Issue 1008 | Page 19 |
