Removal And Replacement Of Control Module - Hoshizaki Commercial Series Service Manual

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H. Removal and Replacement of Control Module
1) Move the power switch to the "OFF" position, then unplug the unit.
2) Remove the control box cover.
3) Disconnect the display cable, defrost thermistor, and cabinet thermistor from the control
module.
4) Remove the nut securing the control module to the control box.
5) Note the position of the wires on the control module's lower terminals. Remove the wires
from the lower terminals and connect them to the same terminals on the replacement
control module.
6) Fasten the control module to the control box.
7) Connect the display cable, defrost thermistor, and cabinet thermistor to the control
module.
8) Replace the control box cover in its correct position.
9) Plug the unit back in. Move the power switch to the "ON" position.
10) The spindle on the control module controls the setpoint until the display module
is activated. To activate the display module, press the upper button on the display
module to view the current setpoint. Failure to activate the display module may result in
unexpected cabinet temperatures.
Note: If three dashes (- - -) appear on the display module when energized, the
compressor and display module are off. To turn the compressor and display
module on, press and hold the upper and lower buttons until the temperature
appears on the display. CAUTION! The three dashes must be cleared,
otherwise the compressor will not run and product will be lost.
Control Module
Control Box
Fig. 7 CAUTION! The three dashes must be cleared,
otherwise the compressor will not run and
product will be lost.
To turn the compressor and display module on,
press and hold the upper and lower buttons until
the temperature appears on the display.
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