06 Compressor open start circuit

What the control is telling you

The ICC sees current in the run circuit but none in the start circuit. If this happens four (4) times in one compressor call the ICC locks out with L6. Reported as 6 flashes on the L terminal.

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

Likely causes

• Damaged, wrong or miswired run capacitor
• Broken wire or loose connector in the start circuit
• Open start winding

Test and repair steps

1. Check the run capacitor for damage, wrong value or miswiring.
2. Check for broken wires, loose connectors or a miswired compressor.
3. Check compressor windings for continuity.
4. Check the start wire from ICC to compressor S terminal.

Settings for these units

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

Do not reduce the 60 in. discharge or 24 in. service clearances.

Inlet clearances under 6 in. reduce capacity and efficiency.

Models that show this code

4 models in Rheem/Ruud PRL-JEC heat pump (Comfort Control2 ICC)

Other codes on the same units

• 3 flashes (L terminal) L-terminal fault output: Unit short cycling
• 4 flashes (L terminal) L-terminal fault output: Locked rotor
• 05 Open circuit - compressor will not run
• 5 flashes (L terminal) L-terminal fault output: Compressor will not run, open circuit
• 6 flashes (L terminal) L-terminal fault output: Open start circuit
• 07 Compressor open run circuit
• 7 flashes (L terminal) L-terminal fault output: Open run circuit
• 8 flashes (L terminal) L-terminal fault output: Control mis-operation