| Alarm Codes and Troubleshooting | ||
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Alarm ID | Message Name | Action required to Clear/Recover | |
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313 | Indoor/Outdoor Unit Capacity Mismatch | Incorrect indoor/outdoor capacity code selected. Check for proper configuring in installation instructions. Alarm | |
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| is just a warning. The system will operate, but might not meet efficiency and capacity parameters and alarm | |
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| would clear when commissioning is exited. | |
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345 | Relay O Failure | O relay / Stage 1 failed (Pilot relay contacts did not close or the relay coil did not energize), | |
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346 | HP Jumper not Removed | Configuration jumper(s) not removed on control board cut O−R. Applicable with non communicating outdoor unit | |
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| with communicating indoor system. | |
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347 | Relay Y1 Failure | Y1 relay / Stage 1 failed (Pilot relay contacts did not close or the relay coil did not energize), | |
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348 | Relay Y2 Failure | Y2 relay / Stage 2 failed (Pilot relay contacts did not close or the relay coil did not energize), | |
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349 | IFC Error Check Jumper O to R | Configuration link R to O needs to restored Applicable in non communicating mode, | |
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350 | Electric Heat not Configured | Heat call with no configured or mis−configured electric heat. Check for proper configuring under Configuring | |
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| Electric Heat Stages in the air handler installation instructions. | |
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351 | Electric Heat Stage 1 Problem | Heat section / Stage 1 failed (Pilot relay contacts did not close or the relay coil in the electric heat section did | |
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| not energize). | |
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352 | Electric Heat Stage 2 Problem | Heat section / Stage 2 failed (Same as Code 351). | |
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353 | Electric Heat Stage 3 Problem | Heat section / Stage 3 failed (Same as Code 351). | |
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354 | Electric Heat Stage 4 Problem | Heat section / Stage 4 failed (Same as Code 351). | |
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355 | Electric Heat Stage 5 Problem | Heat section / Stage 5 failed (Same as Code 351). | |
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400 | LSOM Compressor Internal Overload Tripped | Compressor protector is open. Check for high head pressure, check compressor supply voltage. | |
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| Outdoor unit power disconnect is open. | |
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| Compressor circuit breaker or fuse(s) is open. | |
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| Broken wire or connector is not making contact. | |
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| Low or high pressure switch open if present in the system. | |
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| Compressor contactor has failed to close. | |
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401 | LSOM Compressor Long Run Cycle | Compressor ran over 18 hours on one room thermostat demand. | |
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402 | LSOM Outdoor Unit System Pressure Trip | Outdoor unit pressure trip. Check dirty coil, fan motor, refrigerant charge. | |
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403 | LSOM Compressor Short−Cycling | Compressor short cycling (Running less than 4 minutes). | |
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404 | LSOM Compressor Rotor Locked | Check capacitor, wiring, hard−start kit, replace compressor. | |
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405 | LSOM Compressor Open Circuit |
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| Check compressor for hot (cool down), check pressures, fan motor etc. Replace compressor if unable to get | |
406 | LSOM Compressor Open Start Circuit | ||
circuit to close and compressor to operate. | |||
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407 | LSOM Compressor Open Run Circuit | ||
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408 | LSOM Compressor Contactor Welded | Replace contactor. | |
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409 | LSOM Compressor Voltage Low | Check power to unit. | |
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table continued on next page
506052−01 11/09 | Page 34 |
