Section 6Electrical System
6-36
Component Specifications and Diagnostics
FUSES
Function
The control board fuse(s) stops ice machine operation
if electrical components fail causing high amp draw.
Specifications
Fuse Specifications
Main Fuse 250 Volt, 7 Amp
Transformer Fuse
1
250 Volt, 60 Hz, .125 Amp
250 Volt, 50 Hz, .100 Amp
1
The transformer fuse is not used on new style dual voltage
control boards.
Check Procedure
WARNING
High (line) voltage is applied to the control board
(terminals #55 and #56) at all times. Removing
control board fuses or moving the toggle switch to
OFF will not remove the power supplied to the
control board.
1. If the bin switch light is on with the water curtain
closed, both fuses are good.
WARNING
Disconnect electrical power to the entire ice
machine before proceeding.
2. Remove the fuse. Check the resistance across the
fuse with an ohm meter.
Reading Result
Open (OL) Replace fuse
Closed (O) Fuse is good
BIN SWITCH
Function
Bin switch operation is controlled by movement of
the water curtain. The bin switch has two main
functions:
1. Terminating the harvest cycle and returning the
ice machine to the freeze cycle.
This occurs when the bin switch is opened and closed
again within 7 seconds during the harvest cycle.
2. Automatic ice machine shut-off.
If the storage bin is full at the end of a harvest cycle,
the sheet of cubes fails to clear the water curtain
and holds it open. After the water curtain is held
open for 7 seconds, the ice machine shuts off.
The ice machine remains off until enough ice is
removed from the storage bin to allow the sheet
of cubes to drop clear of the water curtain. As the
water curtain swings back to the operating
position, the bin switch closes and the ice
machine restarts.
Important
The water curtain must be ON (bin switch closed)
to start ice making.
Specifications
The bin switch is a magnetically operated reed
switch. The magnet is attached to the lower right
corner of the water curtain. The switch is attached to
the evaporator mounting bracket.
The bin switch is connected to a varying D.C. voltage
circuit. (Voltage does not remain constant.)
NOTE: Because of a wide variation in D.C. voltage,
it is not recommended that a voltmeter be used to
check bin switch operation.
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