Rheem RARL-JEC Installation Instructions - Page 26

Dual 7-Segment LEDs Display Code Diagnostic Description 29 - High Pressure Control Open The ICC detects the HPC is open LL29 - Active Protection High Pressure Control Trip Status/Possible Cause - Troubleshooting Information • 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 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 29 FLASHING 30 - Fuse Open The ICC detects the on-board fuse is open 80 - Low Air Flow The ICC detects that the indoor unit is not providing the minimum airflow requirements. 83 - Condenser Coil Temperature Fault The sensor detects an abnormally low or high coil temperature 84 - Outdoor Ambient Temperature Fault The sensor detects an abnormally low or high outdoor ambient temperature 93 - Internal Control Fault The control is not functioning properly. d1 - No Shared Data d3 - Airflow CFM Mismatch The indoor air mover (air handler/furnace) cannot supply the required airflow for proper system operation d4 - (Device) Memory Card Invalid for Device The data in the memory card inserted into the control board does not match the data in the control. d8 - Old Shared Data System data is obsolete • The 3-amp fuse on the ICC is open. • Low voltage wiring at R and C is damaged or miswired. • Misapplied/wrong indoor air mover - replace with properly sized unit. • Replace the sensor • Check sensor is installed correctly on control • Check unit placement - If the outdoor unit is in a high temperature area, wait until the ambient temperature drops and check sensor reading. • Replace the sensor. • Check sensor is installed correctly on control • Check control for proper system operation. • Replace control • Replace memory card with correct system information. • Misapplied/wrong indoor air mover - replace with properly sized air handler/furnace. • Check memory card to ensure it matches device • Check if memory card is present • If system will not operate, order new memory card to update system information. 26