R - A 22
Alert Code Response
PM bad or missing
Comfort Control = No Error Code Displayed
User Interface = PM DATA ERR
Air Handler Fault LED = 2 Flash
or
Furnace Fault LED = No Fault Reported
Problem Description
• The primary copy of the Personality Module (PM) data
file is corrupt but the local copy previously loaded is
good
- System will continue to operate with this error but a
fault will be displayed on user interface
Possible Causes/Solutions
• Replace PM
- PM could be corrupted due to a power surge or
damaged due to faulty field wiring
Fuse failure
Comfort Control = No Error Code Displayed
User Interface = CHECK FUSE
Air Handler Fault LED = Solid ON
or
Furnace Fault LED = No Fault Reported
Problem Description
• 24v fuse on control board is open
- Status LED will also be “ON” solid when this fault
condition exists
Possible Causes/Solutions
• Shorted low voltage field wiring
• High amp draw in low voltage circuit
• High resistance in field wiring
PM bad or missing
Comfort Control = No Error Code Displayed
User Interface = PM UNIT ERR
Air Handler Fault LED = 2 Flash
or
Furnace Fault LED = No Fault Reported
Problem Description
• The primary copy of the Personality Module (PM) data
file is corrupt but the local copy previously loaded is
good
- System will continue to operate with this error but a
fault will be displayed on user interface
Possible Causes/Solutions
• Replace PM
- PM could be corrupted due to a power surge or
damaged due to faulty field wiring
PM bad or missing
Comfort Control = No Error Code Displayed
User Interface = CAP MISMATCH
Air Handler Fault LED = 2 Flash
or
Furnace Fault LED = No Fault Reported
Problem Description
• Outdoor unit tonnage stored in outdoor unit
Personality Module (PM) does not match capacity
range in indoor Personality Module (PM)
- System will continue to operate with this error but a
fault will be displayed on user interface
Possible Causes/Solutions
• Outdoor unit is not an approved rated match
- See ARI Guide for proper system match-ups
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