29
Dual 7-Segment
LEDs Display
Code
Diagnostic Description
Status/Possible Cause – Troubleshooting
Information
29 – High Pressure Control Open
The ICC detects the HPC is open
• 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
29L – Active Protection High Pressure
Control Trip
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
83 – Condenser Coil Temperature Fault
The sensor detects an abnormally low or
high coil temperature
• Replace the sensor
• Check sensor is installed correctly on control
84 – Outdoor Ambient Temperature Fault
The sensor detects an abnormally low or
high outdoor ambient temperature
• 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
93 – Internal Control Fault
The control is not functioning
properly.
• Check control for proper system
operation.
• Replace control
d1 – No Shared Data • Replace memory card with correct system
information.
No Voltage Compressor
Welded Relay
• Check to ensure power to compressor is correct
• Check system to ensure proper operation
• Check capacitor
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