P6 Overheating Protection On Cooling Mode - Friedrich Chill Premier Inverter Series Service Manual

3.2.13 P6---Overheating protection on Cooling mode

P6 Overheating protection on Cooling mode

On Cooling or Dry mode, when ODU condenser coil temperature OPT≥144˚F, Main PCB will switch off
Switch on unit after minutes Display P5 3.2.12 P5---Sub-cooling protection on Cooling/Dry mode On Cooling or Dry mode, when IDU evaporator coil temperature IPT＜2 F continuously for 3 min after compressor start up for 6 min, CPU will switch off outdoor unit and show P5 failure code.
temperature environment mode under low Note: Cooling rotate freely? Can fan blade blocked? IDU air inlet easily have P5 No protection Normal Display P5 Yes Air filter dirty? fan blade Check and repair No No P5 disappear? P5 disappear? P5 disappear? No No Yes Yes Yes No Clean Clean filter Yes No Yes Yes
Sensor IPT protection Replace sensor Yes works too slow abnormal? Replace Display PCB Fan motor or stopped End Fan motor No No Yes No Yes Replace motor defect?
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outdoor unit and show P6 failure code.
Display
Outdoor
motor
normal?
Sensor loosing
from connector?
The sensor open
or short circuit?
Replace OPT sensor
No
P6 disappear?
Replace Main PCB
37
TROUBLESHOOTING
P6
No
fan
works
Yes
Yes
No
Yes
Yes
End
Yes
Fan motor
broken?
No
Yes
Re-connect sensor
Replace fan motor
No
P6 disappear?
No
P6 disappear?
Yes