Rheem · Heat pump

05 Open circuit - compressor will not run

High severity Rheem/Ruud PRL-JEC heat pump (Comfort Control2 ICC)

What the control is telling you

There is a call for the compressor but no current in either the start or run winding circuits, or a protector trip has lasted more than 4 hours. The ICC retries every 5 minutes for 4 tries, then every 20 minutes for up to 4 hours. Reported as 5 flashes on the L terminal.

Applies to: (-)PRL-JEC 2-stage 16 SEER heat pumps: RPRL/UPRL-024JEC, -036JEC, -048JEC, -060JEC

Likely causes

Compressor internal protector open
Damaged, wrong or miswired run capacitor
Broken wire, loose connector or miswired compressor
Open compressor winding

Test and repair steps

Check for an open compressor internal protector (let the compressor cool; can take up to 2 hours).
Check the run capacitor for damage, wrong value or miswiring.
Check for broken wires, loose connectors or a miswired compressor.
Check compressor windings for continuity.
Verify line voltage reaches the compressor through the ICC compressor relay (K2).

Settings for these units

Outdoor unit clearances · Rheem/Ruud PRL-JEC heat pump (Comfort Control2 ICC)

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Source: Rheem (-)PRL-JEC Heat Pump Installation Instructions, 12.6 ICC Diagnostic Codes, p.29. Summarized in our own words; check the original manual for your model.

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