Hoshizaki KM-1601MRH/3 Ice Maker User Manual


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33
D. Float Switch Check and Cleaning
The oat switch is used to determine that there is sufficient water in the tank after the
1-minute ll cycle and after each harvest cycle. The oat switch is also used to determine
that the appropriate volume of water has been converted into ice before switching out of
the freeze cycle. No adjustment is required.
1. Float Switch Check
To check the oat switch, follow the steps below.
1) Turn off the power supply.
2) Remove the front panel, then move the
controlswitchtothe"OFF"position.
3) Remove the insulation panel, then remove
the drain plug located on the lower front
part of the ice chute. See Fig. 1. Allow the
water tank to drain.
4) Replace the drain plug in its correct
position. Be careful not to cross thread it.
5) Remove the control box cover.
6) Disconnect the black oat switch
connector from the control board BLACK
K5 connector.
7) Check for continuity across the oat switch leads. With the water tank empty, the oat
switchshouldbeopen.Ifopen,continuetostep8.Ifclosed,followthestepsin"IV.D.2.
FloatSwitchCleaning."Aftercleaningtheoatswitch,checkitagain.Replaceif
necessary.
8) Reconnect the black oat switch connector to the control board BLACK K5 connector,
then replace the control box cover in its correct position.
9)Movethecontrolswitchtothe"ICE"position.Replacetheinsulationpanelandthe
front panel in their correct positions, then turn on the power supply. After 1 minute, the
1-minute ll cycle should end and the initial harvest cycle should begin. If the initial
harvest cycle begins, the oat switch is good and the check is complete. If the initial
harvest cycle does not begin, continue to step 10.
10) Turn off the power supply.
11)Removethefrontpanel,thenmovethecontrolswitchtothe"OFF"position.
12) Remove the control box cover.
13) Disconnect the black oat switch connector from the control board BLACK K5 connector.
14) Check for continuity across the oat switch leads. With the water tank full, the oat
switch should be closed. If the oat switch is closed and the icemaker will not switch
from the 1-minute ll cycle to the initial harvest cycle, replace the control board.
If open, conrm that the water tank is full. If the tank is not full, check the water supply,
waterlters,andinletwatervalve.Ifthetankisfull,followthestepsin"IV.D.2.Float
SwitchCleaning."Aftercleaningtheoatswitch,checkitagain.Replaceifnecessary.
Drain Plug
Ice Chute
Fig. 1
Float Switch Assembly
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