Hoshizaki KM-1340MAH, Service Manual

3

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.

CONTENTS

I. Specifications ...................................................................................................................... 5

A. Icemaker ....................................................................................................................... 5

1. KM-1340MAH (air-cooled) ....................................................................................... 5
2. KM-1340MWH (water-cooled) ................................................................................. 6
3. KM-1340MRH (remote air-cooled) .......................................................................... 7

B. Condensing Unit ............................................................................................................ 8

1. URC-14F ................................................................................................................. 8

II. General Information ......................................................................................................... 10

A. Construction ................................................................................................................ 10

1. KM-1340MAH (air-cooled) ..................................................................................... 10
2. KM-1340MWH (water-cooled) ............................................................................... 11
3. KM-1340MRH (remote air-cooled) ........................................................................ 12

B. Sequence of Operation ............................................................................................... 13

1. One Minute Fill Cycle ............................................................................................ 13
2. Initial Harvest Cycle  .............................................................................................. 13
3. Freeze Cycle  ......................................................................................................... 13
4. Pump-Out Cycle  ................................................................................................... 13
5. Normal Harvest Cycle  .......................................................................................... 13

C. Control Board .............................................................................................................. 15

1. Control Board Layout ............................................................................................. 16
2. Features ................................................................................................................ 17

a) Maximum Water Supply Period – 6 minutes ....................................................... 17
b) Harvest Backup Timer and Freeze Timer ........................................................... 17
c) High Temperature Safety .................................................................................... 17
d) Low Water Safety ............................................................................................... 17
e) High Voltage and Low Voltage Cut-outs ............................................................. 17
f) LED Lights and Audible Alarm Safeties ............................................................... 18

3. Controls and Adjustments ..................................................................................... 19

a) Default Dip Switch Settings ................................................................................ 19
b) Harvest Control – Thermistor ............................................................................. 19
c) Harvest Timer (dip switch 1 & 2) ......................................................................... 20
d) Pump-Out Timer (dip switch 3 & 4)..................................................................... 20
e) Pump-Out Frequency Control (dip switch 5 & 6) ................................................ 21
f) Freeze Timer (dip switch 9 & 10) ......................................................................... 21
g) Bin Control .......................................................................................................... 21

4. Control Board Check Procedure ............................................................................ 22
5. Control Board Replacement .................................................................................. 22