Hoshizaki KM-650MAH, KM-650MRH, KM-650MWH service manual Contents

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-650MAH (air-cooled)	5
2. KM-650MWH (water-cooled)	6
3. KM-650MRH (remote air-cooled)	7
B. Condensing Unit	8
1. URC-5F	8
II. General Information	10
A. Construction	10
1. KM-650MAH (air-cooled)	10
2. KM-650MWH (water-cooled)	11
3. KM-650MRH (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