Table Of Contents - Hoshizaki KML-451MAH Service Manual

Please review this manual. It should be read carefully before the icemaker is serviced or
maintenance operations are performed. Only qualified service technicians should service
and maintain the icemaker. This manual should be made available to the technician prior to
service or maintenance.
I. Specifications ...................................................................................................................... 5
A. Icemaker ....................................................................................................................... 5
1. KML-451MAH (air-cooled) ....................................................................................... 5
2. KML-451MWH (water-cooled) ................................................................................. 6
II. General Information ........................................................................................................... 7
A. Construction .................................................................................................................. 7
1. KML-451MAH (air-cooled) ....................................................................................... 7
2. KML-451MWH (water-cooled) ................................................................................. 8
B. Sequence of Operation ................................................................................................. 9
1. One Minute Fill Cycle .............................................................................................. 9
2. Initial Harvest Cycle ................................................................................................ 9
3. Freeze Cycle ........................................................................................................... 9
4. Pump-Out Cycle ..................................................................................................... 9
5. Normal Harvest Cycle ............................................................................................ 9
C. Control Board .............................................................................................................. 11
1. Control Board Layout ............................................................................................. 12
2. Features ................................................................................................................ 13
a) Maximum Water Supply Period - 6 minutes ....................................................... 13
b) Harvest Backup Timer and Freeze Timer ........................................................... 13
c) High Temperature Safety .................................................................................... 13
d) Low Water Safety ............................................................................................... 13
e) High Voltage and Low Voltage Cut-outs ............................................................. 13
f) LED Lights and Audible Alarm Safeties ............................................................... 14
3. Controls and Adjustments ..................................................................................... 15
a) Default Dip Switch Settings ................................................................................ 15
b) Harvest Timer (dip switch 1 & 2) ........................................................................ 15
c) Pump-Out Timer (dip switch 3 & 4) ..................................................................... 16
d) Pump-Out Frequency Control (dip switch 5 & 6) ................................................ 16
e) Freeze Timer (dip switch 9 & 10) ........................................................................ 17
4. Control Board Check Procedure ............................................................................ 17
5. Control Board Replacement .................................................................................. 17
D. Harvest Control - Thermistor ...................................................................................... 18
E. Bin Control .................................................................................................................. 18
F. Switches ...................................................................................................................... 18
1. Control Switch ....................................................................................................... 18
2. Service Switch ....................................................................................................... 19
a) DRAIN ................................................................................................................ 19
b) CIRCULATE ....................................................................................................... 19
c) WASH ................................................................................................................. 19
CONTENTS
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