Manitowoc MD0420A, Technician'S Handbook

Page: 90 / 132

90 Part Number 040005626 5/17
Float Switch
Function
Open and close to indicate to the control board the
level of water in the water trough.
Specifications
Normally closed, float operated magnetic reed switch.
The float switch contacts are closed in the down
position. When water raises the float to the up position
the magnet in the float opens the contacts.
Check Procedure
The ice machine uses two float switches.
Ice Thickness Float -Indicates the water level has
been reached.
Harvest Float - Indicates a harvest cycle needs to be
initiated.
Initial testing can be performed by viewing the control
board light(s) while raising and lowering the float. The
corresponding control board light must turn on and off
when the float is raised and lowered.
Harvest Float switch:
A. The light must be on in the up position.
B. The light must be off in the down position.
Ice Thickness Float Switch:
A. The light must be off in the down position.
B. The light must be on in the up position.