Replacing The Id Coil Thermistor; Replacing The Control Board - Friedrich KUHL R-410A Service Manual

REPLACING THE INDOOR COIL
THERMISTOR
WARNING
ELECTRIC SHOCK HAZARD
Disconnect power to the unit before
servicing. Failure to follow this warning
could result in serious injury or death.
Remove the decorative front cover (see page 30).
Remove all indicated screws below (8 total, see fi gure
below). Remove the Discharge Sensor and the User
Interface plugs from the control board.
Remove the screws indicated at the side and back plate
(6 total, see fi gure below). Partially lift the top cover and
at the same time carefully swing out from the top, the
back and side plate.
Replace the indoor coil sensor. Ensure to properly clip
and insulate it at the same location (see fi gure below).

REPLACING THE CONTROL BOARD

Remove the decorative front cover (see page 30).
Disconnect discharge sensor plug (red)
Disconnect the User Interface plug (white)
Remove the 3 screws indicated below.
Pull control board and mount plate out and disconnect
the following connectors from it:
Power, capacitor, thermistors, fan, reversing valve
and heater.
Remove the hex screw holding the control board to
its mount plate. Pull out the control board (see fi gure
Up
below).
Swing
Out
WARNING
ELECTRIC SHOCK HAZARD
Disconnect power to the unit before
servicing. Failure to follow this warning
could result in serious injury or death.
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