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| Flash Codes (cont.) | |
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| LED | Fault Description | Troubleshooting Information |
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| Status |
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| ALERT | Short Cycling | 1. Thermostat demand signal is intermittent |
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| (Yellow) | Compressor is | 2. Time delay relay or control board defective |
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| Flash | running | 3. If high pressure switch present, go to Flash Code 2 info |
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| Code 3 | only briefly | 4. If low pressure switch present, go to Flash Code 1 info |
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| 1. Run capacitor has failed |
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| ALERT |
| 2. Low line voltage (contact utility if voltage at disconnect is low) |
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| (Yellow) | Locked Rotor | * Check wiring connections |
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| Flash | 3. Excessive liquid refrigerant in compressor |
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| Code 4 |
| 4. Compressor bearings are seized |
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| *Measure compressor oil level |
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| 1. Outdoor unit power disconnect is open |
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| 2. Compressor circuit breaker or fuse(s) is open |
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| 3. Compressor contactor has failed open |
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| * Check compressor contactor wiring and connectors |
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| ALERT |
| * Check for compressor contactor failure (burned, pitted, or open) |
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| (Yellow) | Open Circuit | * Check wiring and connectors between supply and compressor |
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| Flash | * Check for low pilot voltage at compressor contactor coil |
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| Code 5 |
| 4. High pressure switch is open and requires manual reset |
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| 5. Open circuit in compressor supply wiring or connections |
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| 6. Unusually long compressor protector reset time due to extreme ambient temperature |
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| 7. Compressor windings are damaged |
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| * Check compressor motor winding resistance |
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| ALERT |
| 1. Run capacitor has failed |
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| Open Start Circuit | 2. Open circuit in compressor start wiring or connections |
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| (Yellow) |
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| Current only in run | * Check wiring and connectors between supply and the compressor S terminal |
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| Flash |
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| circuit | 3. Compressor start winding is damaged |
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| Code 6 |
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| * Check compressor motor winding resistance |
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| ALERT | Open Run Circuit | 1. Open circuit in compressor run wiring or connections |
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| (Yellow) | * Check wiring and connectors between supply and the compressor R terminal |
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| Current only in start |
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| Flash | 2. Compressor run winding is damaged |
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| circuit |
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| Code 7 | * Check compressor motor winding resistance |
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| ALERT | Welded Contactor |
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| (Yellow) | 1. Compressor contactor has failed closed |
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| Compressor always |
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| Flash | 2. Thermostat demand signal not connected to module |
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| runs |
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| Code 8 |
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| ALERT | Low Voltage | 1. Control circuit transformer is overloaded |
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| (Yellow) |
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| Control circuit less | 2. Low line voltage (contact utility if voltage at disconnect is low) |
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| Flash |
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| than 17VAC | * Check wiring conditions |
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| Code 9 |
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| Table 10 | |
Issue 1008 | Page 18 |
