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7
REMOVING AND REFITTING OF
COMPONENTS
7.1
Removal Of Power/Control Module
Located in the unit compartment on the right hand side and held in place by 2 self-tapping screws.
1. Unplug the refrigerator from the power supply.
2. Remove both mounting screws and earth screw (on the green / yellow earth wire) on the compressor
mounting tray.
3. Pull the power/control module outwards to disengage the mounting lugs at the back of the module.
4. Remove all connectors along the top edge of the power/control module.
5. Remove the defrost connector (brown wires) and the VCC high voltage supply connector which is
connected to the terminals marked "H Rail" on the side of the power/control module.
6.
Refit in reverse order.
Note: It is important that the power/control module is clipped securely to the side of the unit compartment
and the copper earth spring clip is not damaged as this maintains good earthing and provides a low
inductance path to the chassis for RF voltage. Check that the flat pins at the back of the module are properly
engaged with the lugs on the unit compartment when refitting.
Initialisation Of The Power/Control Module After Installation
The power/control module needs to know whether it is fitted into a "B" or "T" model upon installation because
it performs different functions when either the PC or FC doors are opened. To do this, we need to "initialise"
the power/control module.
To initialise the power/control module, the service technician must have the FC door closed and the PC door
open, then press any of the buttons on the user interface in the PC. The power/control module then knows
that the reed switch that is open circuit is controlled by the PC door, and the one that is closed circuit is
controlled by the FC door.
If the power/control module is not initialised, as may be the situation for a new service module, the lights will
not turn on and the fans will run with the door open. If the operator presses a button with both doors opened,
the illegal raspberry audible feedback will sound, indicating that the module is unable to be initialised.
7.2
PC Sensor Replacement
1. Unplug the refrigerator from the power supply.
2. Remove all PC shelving.
3. Remove bottom PC air duct cover.
4. Remove polystyrene duct cover insulation.
5. Disconnect low ambient heater - "T" model only.
6. Remove 1 screw from top duct cover and unclip - "T" model only.
7. Remove PC sensor from its location.
8. Replacement of the new sensor is done by cutting the wiring back from the sensor end, and soldering
in a new sensor, making sure both connecting wires are not shorting but are insulated with heat shrink
sleeving.
9. Refit in reverse order.
7.3
FC Sensor Replacement
1. Unplug the refrigerator from the power supply.
2. Prise out the fan shroud using a flat blade screwdriver at the bottom of the grill cover.
3. Remove the FC fan motor plug connection.
4. Unclip the FC sensor and remove the evaporator coil cover.
5. Replacement of the new sensor is done by cutting the wiring back from the sensor end and soldering
in a new sensor, making sure both connecting wires are not shorting but are insulated with heat shrink
sleeving.
6. Refit in reverse order.
35
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