© 2009 Viking Preferred Service
31
Installing the Electronic Control
Reverse removal procedure for installation (See
above). Make sure all wire connections are secure
and in the correct location. Refer to units wiring
diagram to verify (see page 42).
Cutter-Grid Transformer
The cutter-grid transformer is used to step down
the voltage to the cutter-grid to 12VAC. The cutting
grid receives power from the transformer from
the start of a harvest cycle to 35 minutes into the
next production cycle. The transformer remains
off at all other times. The transformer itself can be
checked by applying 120VAC to the marked 120V
(for the hot lead) and COM (neutral lead) side of
the transformer and reading the 12V side using a
multimeter.
If no readout is found or readout is below 10VAC,
replace the transformer.
Removing Transformer
1. Disconnect power, water line, and drain line.
If a drain pump is used, it will need to be
disconnected and removed.
2. Remove back panel and lower shroud
(see
Figure 6
).
3. If a drain pump has been installed, it will need
to be removed. (It may be necessary to remove
electronic control before removing transformer.)
4. Remove the two Phillips head screws that
secure transformer to electrical bracket
(see
Figure 7
).
5. Mark and remove the four wires to transformer.
6. Remove transformer.
Installing Transformer
Reverse removal procedure for installation (see
above). Make certain all wire connections are secure
and in the correct location. Refer to unit’s wiring
diagram to verify (see page 42).
Control
mounting screw
Figure 16
Control
Service Diagnostics and Procedures
(System Components)
Power wire harness
connector
Figure 15
Evaporator
thermistor connector
Bin thermistor
connector
Diagnostic
LED
Transformer
Figure 17
Transformer screw
