Integrated Control Diagnostic Codes (continued)
Code | Diagnostic Codes/Status of Equipment | Action Required to Clear and Recover |
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E 312 | Restricted air flow in cooling or continuous fan mode is lower than cfm | Warning Only. Restricted airflow − Indoor blower is |
| setting. | running at a reduced CFM (Cutback Mode − The |
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| variable speed motor has pre−set speed and torque |
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| limiters to protect the motor from damage caused |
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| by operating outside of design parameters (0 to 0.8" |
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| W.C.. total external static pressure). Check filter and |
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| duct system. To clear, replace filter if needed or re- |
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| pair/add duct. Cleared after the current service de- |
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| mand is satisfied. |
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E 313 | Indoor or outdoor unit capacity mismatch. Communication only. | Incorrect indoor/outdoor capacity code selected. |
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| Check for proper configuring in installation instruc- |
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| tions. Alarm is just a warning. The system will oper- |
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| ate, but might not meet efficiency and capacity pa- |
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| rameters. Alarm will clear when commissioning is |
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| exited. Cleared after commissioning is complete. |
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E 331 | Global network connection − Communication link problem. | For Future Use. |
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E 334 | Relay | Replace integrated control. |
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E 347 | No 24 Volt output on Y1 of "integrated control" with non communicating | Operation stopped. Y1 relay / Stage 1 failed. (Pilot |
| outdoor unit. | relay contacts did not close or the relay coil did not |
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| energize; no input back to IFC chip). Critical Alert. |
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| Cleared after reset and Y1 input sensed. |
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|
E 348 | No 24 Volt output on Y2 of "integrated control" with non?communicating | Y2 relay / Stage 2 failed. (Pilot relay contacts did |
| outdoor unit. | not close or the relay coil did not energize; no input |
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| back to IFC chip). Critical Alert. Cleared after reset |
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| and Y1 input sensed. |
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E 349 | No 24 Volts between R & O on "integrated control" with non communi- | Configuration link R to O needs to be restored. Re- |
| cating outdoor unit (Dual fuel module required for heat pump application). | place link or hard−wire. Applicable in non communi- |
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| cating mode. Critical Alert. |
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E 370 | Interlock switch sensed open for 2 minutes. | Control sees the loss of 24VAC for 2 minutes .Ter- |
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| minate all services and wait for interlock switch to |
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| close. The alarm will clear when 24VAC is continu- |
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| ously sensed on DS terminal for a minimum of 10 |
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| seconds or on a power reset. |
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E 400 | LSOM − Compressor internal overload tripped. | Thermostat demand Y1 is present; but, compressor |
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| is not running. Check power to outdoor unit. Clears |
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| the error after current is sensed in both RUN and |
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| START sensors for at least 2 seconds, or after ser- |
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| vice is removed, or after power reset. |
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E 401 | LSOM Compressor long run cycle or low system pressure. | Compressor ran more than 18 hours to satisfy a |
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| single thermostat demand. Critical Alert. Clears the |
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| error after 30 consecutive normal run cycles or |
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| power reset. Also monitors low pressure switch |
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| trips. |
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E 402 | LSOM − Outdoor unit system pressure trip. | Discharge or suction pressure out−of−limits, or com- |
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| pressor overloaded. Clears the error after 4 consec- |
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| utive normal compressor run cycles. |
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E 403 | LSOM − Compressor short−cycling. .(Running less than 4 minutes). Out- | Compressor runs less than 3 minutes to satisfy a |
| door unit pressure trip | thermostat demand. Clears the error after 4 consec- |
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| utive normal run cycles or power reset. |
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E 404 | LSOM − Compressor rotor locked. Compressor short−cycling. (Running | Compressor rotor locked up due to run capacitor |
| less than 4 minutes). | short, bearings are seized, excessive liquid refriger- |
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| ant, etc. Clears the error after 4 consecutive normal |
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| run cycles or after power reset. |
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E 405 | LSOM − Compressor open circuit. | Compressor circuit open (due to power disconnec- |
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| tion, open fuse, etc.) Clears the error after 1 normal |
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| compressor run cycle. |
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