Digital Control Diagnostics - Friedrich PTAC - R410A Service Manual

DIGITAL CONTROL DIAGNOSTICS

The chart below lists malfunctions and their description.
1 Indoor air temp sensor open/short
2 Indoor coil sensor open or short
3 Outdoor coil sensor open/short
4 Freeze Guard protection
5 Indoor coil high temp protection
6 Outdoor coil high temp protection
7 Indoor coil freeze protection
8 Defrost (heat pump type)
9 Thermostat wiring error
Display 'F1', with STATUS light flash
Display 'F2', with STATUS light flash
Display 'F4', with STATUS light flash
Display 'FP', with STATUS light flash
STATUS light flash 8 times and off 3 sec, repeat
STATUS light flash 6 times and off 3 sec, repeat
STATUS light flash 5 times and off 3 sec, repeat
STATUS light flash 7 times and off 3 sec, repeat
STATUS light flash 9 times and off 3 sec, repeat
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