Rheem RARL-JEC Installation Instructions - Page 25

Dual 7-Segment LEDs Display Code Diagnostic Description 05 - Open circuit (Compressor will not Run) • The ICC has had a protector trip for longer than 4 hours 06 - Compressor Open Start Circuit The ICC detects current in the Run circuit but not in the Start circuit of the compressor 06 - Compressor Open Start Circuit The ICC detects current in the Run circuit but not in the Start circuit of the compressor four (4) times in one compressor call 07 - Compressor Open Run Circuit The ICC detects current in the Start circuit but not in the Run circuit of the compressor 07 - Compressor Open Run Circuit The ICC detects current in the Start circuit but not in the Run circuit of the compressor four (4) times in one compressor call 09 - Low Secondary Volts The secondary voltage at R and C is below 18VAC Status/Possible Cause - Troubleshooting Information • Check for damaged, miswired, or wrong run capacitor • Check for broken wires, loose connectors, or miswired compressor • Check compressor windings for continuity • Check for open compressor internal protector • Check for damaged, miswired, or wrong run capacitor • Check for broken wires, loose connectors, or miswired compressor • Check compressor windings for continuity • Check for damaged, miswired, or wrong run capacitor • Check for broken wires, loose connectors, or miswired compressor • Check compressor windings for continuity • Check for damaged, miswired, or wrong run capacitor • Check for broken wires, loose connectors, or miswired compressor • Check compressor windings for continuity • Check for damaged, miswired, or wrong run capacitor • Check for broken wires, loose connectors, or miswired compressor • Check compressor windings for continuity • Control transformer overloaded • Low line voltage 21 - Low Pressure Control Open The ICC detects the LPC is open. Note: The low pressure control is ignored for the first 90 seconds of compressor operation LL21 - Active Protection Low Pressure Control Trip • Unit has low refrigerant charge • Indoor coil is frozen (cooling mode) • Dirty indoor coil or filter (cooling mode) • Indoor blower is not running (cooling mode) • Outdoor coil is frozen (heating mode) • Expansion valve is not operating correctly LPC has opened 3 times in the same cooling operation, the ICC has locked out the compressor to protect it. ICC alternately flashes L and 21 FLASHING 27 - Low Line Voltage or No Line Voltage Fault 28 - High Line Voltage Fault • Check incoming line voltage to the disconnect and unit • Check wiring connections • Check line voltage 25