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During a Hard Lockout, the X2 relay opens so that the Y signal does not pass though.Resume operation when ambient temperature rises to 3F or higher and after a 15 minute soft lockout period expires. During soft lock out the Y signal passes through to the X2 output.

Once ambient drops to -7F or lower, wait 5 minutes before soft lockout begins.

Coil Sensor reading is monitored at the end of defrost and reading must be less than Ambient Sensor after 15 minutes of run time

Do not track if Y cycles off or if defrost takes 15 minutes (Max Time Override).

Ambient Sensor must report a lower temperature than the Coil Sensor immediately after defrost (Coil Sensor should always be higher than Ambient Sensor when defrost terminates). Ambient Sensor reading is monitored at the end of defrost and should not deviate more than +/-5F.

If both Coil Temp Sensor and Ambient Temp Sensor are failed, initiate a 15 minute forced defrost after ever 60 minutes of run time.

1st LPCO trip results in a 15 minute soft lockout period.

Monitor actual time in defrost and add or reduce run time until next forced defrost based on achieving a 4 minute (+/- 1) defrost period.

Initiate Adaptive/Timed Defrost so long as Coil Temp Sensor is functional.

(OFF at -7F/ON at 3F) Outdoor temperature is below -7'Fįault with the external temperature sensor Check Coil sensor placement and verify SOV is operating properly. Implied sensor fault (calibration/range) set after defrost and reset after 15 minutes run time after defrost. Check Ambient sensor placement and verify SOV is operating properly. Follow Soft Lock Out sequence until Hard Lock Out (4 flash) or can clear if conditions no longer exists. Heating Short Cycle Fault triggers 6 flash and 5 flash codes. 5 flash goes away after soft lockout periods expires.ĭefrost cycles too close together.

Hard Lock Out (can only be cleared with power cycle). Initiate a 15 minute forced Defrost after every 60 minutes of runtime. Initiate a 15 minute forced Defrost after every 60 minutes of runtime.Ĭoil Temp Sensor is out of range (open/shorted). Variable Speed Alert Codes American Standard AC Error Codes Led Fault CodesĪmbient Temp Sensor is out of range (open/shorted). Variable Speed AccuLink Heat Pumps and Air Conditioners.