CoreSense 3 Short cycling / pressure switch cycling - yellow 3 (red 3 = lockout)

What the control is telling you

Compressor ran 12 s to 15 min, then tripped for 35 s to 7 min - usually a pressure switch cycling. Red 3 flashes = lockout. The quick reference table says 4 in a row or 10 total; the detailed table says 10 short cycles in a row.

Applies to: Copeland CoreSense 3-wire module: Amana/Deluxe R-410A ASX, ASZ, DSX, DSZ units and Amana R-32 ALXS / ALZS units

Likely causes

• Intermittent thermostat demand
• Faulty time delay relay or control board
• Low or high pressure switch cycling

Test and repair steps

1. Check thermostat and wiring for intermittent contact.
2. Check the time delay relay or defrost board.
3. Find out why a pressure switch is cycling (see codes 1 and 2).
4. Clear the lockout after repair and recheck.

Models that show this code

122 models in Goodman/Amana R-32 GLZS/ALZS, Goodman/Amana R-410A GSZ/ASZ/DSZ (ANZ/SSZ/VSZ)

Other codes on the same units

• CoreSense 1 Yellow 1 flash - long run time (low side)
• CoreSense 2 Pressure trip - yellow 2 flashes (red 2 = lockout)
• CoreSense 4 Locked rotor - yellow 4 (red 4 = lockout)
• CoreSense 5 Moderate run trip - yellow 5 (red 5 = lockout)
• CoreSense 9 Red 9 flashes - PROT output overcurrent
• CoreSense solid red Solid red TRIP - call present but compressor not running