INSTALLATION INSTRUCTIONS |
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Figure 19 |
| Comfort Alertt Diagnostics (some models) |
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Miswired Module Indication |
| Troubleshooting Information |
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Green LED is not on, module | Determine if both R and C module terminals are connected. Verify voltage is |
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does not power up | present at module's R and C terminals. |
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Green LED intermittent, mod‐ | Determine if R and Y terminals are wired in reverse. Verify module's R and C |
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ule powers up only when com‐ | terminals have a constant source. |
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pressor runs |
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TRIP LED is on but system | Verify Y terminal is wired properly per OEM wiring diagram. Verify voltage at |
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and compressor check OK | contactor coil falls below 0.5VAC when off. Verify 24VAC is present across Y and |
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| C when thermostat demand signal is present. If not, R and C are reverse wired. |
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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 |
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(Compressor short cycling) | contactor coil falls below 0.5VAC when off. |
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displayed incorrectly |
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ALERT Flash Code 5 or 6 | Check that compressor T1 and T3 wires are through module's current sensing |
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(Open Circuit, Missing Phase) | holes. Verify Y terminal is connected to 24VAC at contactor coil. Verify voltage at |
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displayed incorrectly | contactor coil falls below 0.5VAC when off. |
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ALERT Flash Code 8 | Determine if module's Y terminal is connected. Verify Y terminal is connected to |
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(Welded Contactor) displayed | 24VAC at contactor coil. Verify 24VAC is present across Y and C when |
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incorrectly | thermostat demand signal is present. If not, R and C are reversed wired. Verify |
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| voltage at contactor coil falls below 0.5VAC when off. Review. |
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16 | International Comfort Products, LLC | 506 01 5001 00 | |
Lewisburg, TN 37091 | |||
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