Rheem RARL-JEC Installation Instructions - Page 24

11.6 COMFORT CONTROL2 SYSTEM™ CONTROL WIRING AND CONVENTIONAL THERMOSTAT WIRING ICC DIAGNOSTIC CODES ICC Diagnostic Codes Descriptions of the ICC diagnostic codes are provided below: Dual 7-Segment LEDs Display Code Diagnostic Description 0 - Standby No command for unit operation Status/Possible Cause - Troubleshooting Information Normal operation c - First Stage Cooling Unit has received a command for first stage cooling c c - Anti-short cycle timer (3 minutes) or Minimum run timer (30 seconds) active FLASHING C - Second Stage Cooling Unit has received a command for second stage cooling CC - Anti-short cycle timer (3 minutes) or Minimum run timer (30 seconds) active FLASHING t - Test Mode Normal operation • The unit has received a command for first stage cooling during an active anti-short cycle timer or minimum run timer. • Wait until unit timer has expired or press the TEST button to defeat short cycle delay. Normal operation • The unit has received a command for second stage cooling during an active anti-short cycle timer or minimum run timer. • Wait unit timer has expired or press the TEST button to defeat short cycle delay. The ICC is in TEST mode P - Protector Trip A command for compressor operation is present but no current is measured to the compressor 01 - Long Run Time (Compressor) The compressor has continuously run for more than 18 hours in the cooling mode. 02 - High Side Fault Compressor limit has opened four (4) times within a call for operation 03 - Short Cycling The ICC detects the run time for the past four (4) compressor cycles is less than three (3) minutes each. L4 - Locked Rotor The ICC detects four (4) consecutive protector trips have occurred and the average run time for each trip is less than 15 seconds • Motor protector open • Line voltage disconnected • Low refrigerant charge • Air ducts have substantial leakage • Dirty indoor air filter • Dirty outdoor coil • Outdoor coil is dirty (cooling mode) • Outdoor fan is not running (cooling mode) • Dirty indoor coil or filter (heating mode) • Indoor blower is not running (heating mode) • Liquid line restriction • Excessive refrigerant charge • Check thermostat wire connections (R, C, 1, & 2) • Check thermostat location in zone (too close to discharge grill) • Bad run capacitor • Low line voltage • Excessive refrigerant in compressor • Seized bearings in compressor 24