Rheem A17 Series Installation Instructions Manual page 38

10.0 DIAGNOSTICS AND TROUBLESHOOTING
10.2 Status and Diagnostic Codes
Descriptions of the EcoNet
Dual 7-Segment
LEDs Display
Code
FLASHING
38
2-Stage Control diagnostic codes are provided below:
TM
Diagnostic Description
29 - High Pressure Control Open
The Outdoor Control detects the HPC is open
29L - Active Protection High Pressure Control Trip
48 - Open Run Circuit or No Compressor Current
49 - Compressor Current with No Call For Cooling
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
Status/Possible Cause - Trouble-
shooting 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
HPC has opened 3 times in the same cooling
operation, the Outdoor Control has locked out
the compressor to protect it. Outdoor Control
alternately flashes L and 29
• Check to ensure power to compressor is
correct
• Check capacitor
• Check for welded contactor contacts
• Check for shorted wires
• Check unit placement - If the outdoor units is
in a high temperature area, wait until the am-
bient temperature drops and check sensor
reading.
• Replace the sensor
• Check if sensor is installed correctly on Out-
door Control
• Check Outdoor Control for proper system
operation
• Replace Outdoor Control
• Replace memory card with correct system
information.