Welbilt 32Z9170, Service & Repair Manual

Page: 92 / 116

6 Replacing components
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Merrychef conneX ® service and repair manual 92
Requirements
Check that the following requirements have been met:

The appliance has been disconnected from the power supply and protective measures have been taken to ensure
the power cannot be switched on again.

The appliance is cool.

The casing of the appliance is removed.

The high voltage capacitors are discharged before commencing work.
Removing a transformer (high voltage)
1. Unplug all the electrical connections on the transformer(s).
2. Disconnect the transformer(s) from the magnetron(s) by unplugging the orange filament cables at the
magnetron(s).
3. Unfasten the four M5 flange nuts to remove a transformer.
4. On the X12 high power variants, the rear HV transformer should be removed first to gain access for removal of the
front HV transformer.
Fitting a transformer (high voltage)
Follow the steps in the reverse order to fit the high voltage transformer(s).

The fixing nuts should be torqued down to 3.5Nm.

On the X12 high power variants, the HV transformer connections on the front HV transformer are on the left-hand
side. The connections of the rear HV transformer are on the right-hand side (looking from the front).

Ensure the wiring is fixed back in the original orientation with new cable ties.
NOTICE:
It is imperative that the electrical connections are replaced correctly. If the electric connections have not been restored
properly this may lead to malfunction/damage of the oven.
Wire
Number
X12 wiring connections X16 wiring connections
Rear HV Transformer Front HV Transformer* RH HV Transformer LH HV Transformer
50Hz 60Hz 50Hz 60Hz 50Hz 60Hz 50Hz 60HZ
31

0V 0V 0V 0V
35

200V 208V 200V 208V
36

230V 240V 230V 240V
44

0V 0V 0V 0V
49

200V 208V 200V 208V
50

230V 240V 230V 240V