Hoshizaki KM-1301SAH/3 User manual

Hoshizaki
“A Superior Degree
of Reliability”
www.hoshizaki.com
Models
KM-1301SAH/3, SWH/3, SRH/3
KM-1400SWH-M, SWH3-M
KM-1601SAH/3, SWH/3, SRH/3
KM-1900SAH/3, SWH/3, SRH/3
KM-2100SWH3, SRH3
KM-2500SWH3, SRH3
KMH-2000SWH/3, SRH/3
Stackable Crescent Cuber
Hoshizaki America, Inc.
SERVICE MANUAL
Number: 73208
Issued: 7-7-2015
Revised: 8-11-2015

2
WARNING
Only qualied service technicians should install and service the appliance. To
obtain the name and phone number of your local Hoshizaki Certied Service
Representative, visit www.hoshizaki.com. No service should be undertaken until
the technician has thoroughly read this Service Manual. Failure to service and
maintain the appliance in accordance with this manual will adversely affect safety,
performance, component life, and warranty coverage and may result in costly water
damage. Proper installation is the responsibility of the installer. Product failure or
property damage due to improper installation is not covered under warranty.
Hoshizaki provides this manual primarily to assist qualied service technicians in the
service of the appliance.
Should the reader have any questions or concerns which have not been satisfactorily
addressed, please call, send an e-mail message, or write to the Hoshizaki Technical
Support Department for assistance.
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
HOSHIZAKI AMERICA, INC.
618 Highway 74 South
Peachtree City, GA 30269
Attn: Hoshizaki Technical Support Department
Web Site: www.hoshizaki.com
NOTE: To expedite assistance, all correspondence/communication MUST include the
following information:
• Model Number
• Serial Number
• Complete and detailed explanation of the problem.

3
CONTENTS
Important Safety Information ................................................................................................. 6
I. Construction and Water/Refrigeration Circuit Diagram ....................................................... 8
A. KM Construction............................................................................................................ 8
1. Air-Cooled Models (SAH/3) ...................................................................................... 8
2. Water-Cooled Models (SWH/3/-M) .......................................................................... 9
3. Remote Models (SRH/3) ....................................................................................... 10
B. KMH Construction ........................................................................................................11
1. Water-Cooled Models (SWH/3) ...............................................................................11
2. Remote Models (SRH/3) ....................................................................................... 12
C. Bin Control .................................................................................................................. 13
1a. Single Thermostatic Bin Control .......................................................................... 13
1b. Stacked Thermostatic Bin Control ....................................................................... 13
2a. Single Mechanical Bin Control............................................................................. 14
2b. Stacked Mechanical Bin Control.......................................................................... 14
D. Water/Refrigeration Circuit Diagram............................................................................ 15
1. Air-Cooled Models (SAH/3) .................................................................................... 15
2. Water-Cooled Models (SWH/3/-M) ........................................................................ 16
3a. Remote Models (SRH/3) Except KM-2500SRH3 ................................................ 17
3b. Remote Models (SRH3) KM-2500SRH3 ............................................................. 18
II. Sequence of Operation and Service Diagnosis............................................................... 19
A. Sequence of Operation Flow Chart............................................................................. 19
1. "E" and "G" Control Board without Harvest Pump Timer Operation ....................... 19
2. "G" Control Board with Harvest Pump Timer Operation ....................................... 20
3a. Thermostatic Bin Control Shutdown .................................................................... 21
3b. Mechanical Bin Control Shutdown....................................................................... 22
B. Service Diagnosis ....................................................................................................... 23
1. "E" and "G" Control Board without Harvest Pump Timer Diagnosis ....................... 24
2. "G" Control Board with Harvest Pump Timer Diagnosis ........................................ 29
C. Control Board Check................................................................................................... 35
D. Bin Control Check ....................................................................................................... 36
1. Thermostatic Bin Control Check............................................................................. 36
2. Mechanical Bin Control Check............................................................................... 37
E. Float Switch Check and Cleaning ............................................................................... 39
1. Float Switch Check ................................................................................................ 39
2. Float Switch Cleaning............................................................................................ 40
F. Thermistor Check......................................................................................................... 41
G. Diagnostic Tables........................................................................................................ 42
IMPORTANT
This manual should be read carefully before the appliance is serviced. Read
the warnings and guidelines contained in this manual carefully as they provide
essential information for the continued safe use, service, and maintenance of the
appliance. Retain this manual for any further reference that may be necessary.

4
III. Controls and Adjustments............................................................................................... 46
A. Control Board Layout .................................................................................................. 47
1. "E" Control Board .................................................................................................. 47
2. "G" Control Board ................................................................................................. 48
B. LED Lights and Audible Alarm Safeties....................................................................... 49
1. "E" Control Board .................................................................................................. 49
2. "G" Control Board ................................................................................................. 50
C. Settings and Adjustments............................................................................................ 51
1. Default Dip Switch Settings .................................................................................... 51
a) "E" and "G" Control Board without Harvest Pump Timer Operation................. 51
b) "G" Control Board with Harvest Pump Timer Operation................................... 52
c) "G" Control Board S5 Dip Switch ..................................................................... 52
2. Harvest Timer (S4 dip switch 1 & 2) ...................................................................... 52
3. Pump-Out Timer (S4 dip switch 3 & 4) .................................................................. 53
4. Pump-Out Frequency Control (S4 dip switch 5 & 6) .............................................. 54
5. Bin Control Selector or Harvest Pump Timer Operation (S4 dip switch 7)............. 54
a) Bin Control Selector: "E" Control Board ............................................................ 54
b) Harvest Pump Timer: "G" Control Board........................................................... 55
6. Factory Use (S4 dip switch 8)................................................................................ 55
7. Freeze Timer (S4 dip switch 9 & 10)....................................................................... 55
8. Float Switch Selector (S5 dip switch 1): "G" Control Board ................................... 56
9. Rell Counter (S5 dip switch 2 through 5): "G" Control Board ............................... 56
D. Control Switch ............................................................................................................. 56
IV. Refrigeration Circuit and Component Service Information.............................................. 57
A. Refrigeration Circuit Service Information .................................................................... 57
B. Component Service Information.................................................................................. 60
C. Water Regulating Valve Adjustment (water-cooled models) ........................................ 61
V. Maintenance .................................................................................................................... 62
VI. Preparing the Icemaker for Periods of Non-Use............................................................. 63
VII. Disposal......................................................................................................................... 65
VIII. Technical Information.................................................................................................... 66
A. Specication and Performance Data........................................................................... 66
1. KM-1301SAH ......................................................................................................... 66
2. KM-1301SAH3....................................................................................................... 67
3. KM-1301SWH ....................................................................................................... 68
4. KM-1301SWH3 ..................................................................................................... 69
5. KM-1301SRH with URC-14F ................................................................................. 70
6. KM-1301SRH3 with URC-14F ............................................................................... 71
7. KM-1400SWH-M .................................................................................................... 72
8. KM-1400SWH3-M ................................................................................................. 73
9. KM-1601SAH..........................................................................................................74
10. KM-1601SAH3 ..................................................................................................... 75
11. KM-1601SWH....................................................................................................... 76
12. KM-1601SWH3 .................................................................................................... 77
13. KM-1601SRH with URC-21F Auxiliary Codes: R-0, R-1, and some S-1.............. 78
14. KM-1601SRH with URC-21F Auxiliary Codes: some S-1 and S-2 and Later ...... 79
15. KM-1601SRH with URC-22F Auxiliary Codes: S-2 and Later.............................. 80

5
16. KM-1601SRH3 with URC-21F Auxiliary Codes: R-0, R-1, and some S-1............ 81
17. KM-1601SRH3 with URC-21F Auxiliary Codes: some S-1 and S-2 and Later ..... 82
18. KM-1601SRH3 with URC-22F Auxiliary Codes: S-2 and Later............................ 83
19. KM-1900SAH....................................................................................................... 84
20. KM-1900SAH3..................................................................................................... 85
21. KM-1900SWH ...................................................................................................... 86
22. KM-1900SWH3.................................................................................................... 87
23. KM-1900SRH with URC-21F............................................................................... 88
24. KM-1900SRH with URC-22F............................................................................... 89
25. KM-1900SRH3 with URC-21F............................................................................. 90
26. KM-1900SRH3 with URC-22F............................................................................. 91
27. KM-2100SWH3 .................................................................................................... 92
28. KM-2100SRH3 with URC-22F............................................................................. 93
29. KM-2500SWH3 ................................................................................................... 94
30. KM-2500SRH3 with URC-23F............................................................................. 95
31. KMH-2000SWH ................................................................................................... 96
32. KMH-2000SWH3................................................................................................. 97
33. KMH-2000SRH with URC-22F ............................................................................ 98
34. KMH-2000SRH3 with URC-22F .......................................................................... 99
B. Wiring Diagrams........................................................................................................ 100
1. "E" and "G" Control Board Schematics without Harvest Pump Timer Relays ..... 100
a) KM-1601SWH, KM-1601SRH, KM-1900S_H, KMH-2000S_H........................ 100
b) KM-1601SWH3, KM-1601SRH3, KM-1900S_H3, KM-2100S_H3,
KM-2500S_H3, KMH-2000S_H3 .....................................................................101
2. "G" Control Board Schematics with Harvest Pump Timer Relays ....................... 102
a) KM-1301S_H T-0, U-0 ..................................................................................... 102
b) KM-1301S_H U-1 to D-0 ................................................................................. 103
c) KM-1301SAH and KM-1301SWH D-1 to E-1................................................... 104
d) KM-1301SRH D-1 to E-0................................................................................. 105
e) KM-1301SRH E-1 and Later ........................................................................... 106
f) KM-1400SWH-M.............................................................................................. 107
g) KM-1601SAH E-0 and Earlier ......................................................................... 108
h) KM-1601SAH E-1 and Later ........................................................................... 109
i) KM-1301S_H3 T-0, U-0 .....................................................................................110
j) KM-1301S_H3 U-1 to E-0 and KM-1601SAH3 A-0 to E-0 ................................. 111
k) KM-1301S_H3 E-1 and KM-1601SAH3 E-1 and Later.....................................112
l) KM-1400SWH3-M.............................................................................................113

6
Important Safety Information
Throughout this manual, notices appear to bring your attention to situations which could
result in death, serious injury, damage to the appliance, or damage to property.
WARNING Indicates a hazardous situation which could result in death or
serious injury.
NOTICE Indicates a situation which could result in damage to the
appliance or property.
IMPORTANT Indicates important information about the use and care of the
appliance.
WARNING
The appliance should be destined only to the use for which it has been expressly
conceived. Any other use should be considered improper and therefore dangerous.
The manufacturer cannot be held responsible for injury or damage resulting from
improper, incorrect, and unreasonable use. Failure to service and maintain the
appliance in accordance with this manual will adversely affect safety, performance,
component life, and warranty coverage and may result in costly water damage.
To reduce the risk of death, electric shock, serious injury, or re, follow basic
precautions including the following:
• Only qualied service technicians should install and service this appliance.
• The appliance must be installed in accordance with applicable national, state, and
local codes and regulations. Failure to meet these code requirements could result in
death, electric shock, serious injury, re, or damage to the appliance.
• Electrical connection must be hard-wired and must meet national, state, and local
electrical code requirements. Failure to meet these code requirements could result
in death, electric shock, serious injury, re, or damage.
• The icemaker requires an independent power supply of proper capacity. See the
nameplate for electrical specications. Failure to use an independent power supply
of proper capacity can result in a tripped breaker, blown fuse, damage to existing
wiring, or component failure. This could lead to heat generation or re.
• THE ICEMAKER MUST BE GROUNDED. Failure to properly ground the icemaker
could result in death or serious injury.
• To reduce the risk of electric shock, do not touch the control switch with damp
hands.
• Move the control switch to the "OFF" position and turn off the power supply before
servicing. Lockout/Tagout to prevent the power supply from being turned back on
inadvertently.
• Do not make any alterations to the appliance. Alterations could result in electric
shock, serious injury, re, or damage.

7
WARNING, continued
• The appliance is not intended for use by persons (including children) with reduced
physical, sensory, or mental capabilities, or lack of experience and knowledge,
unless they have been given supervision or instruction concerning use of the
appliance by a person responsible for their safety.
• Children should be properly supervised around the appliance.
• Do not climb, stand, or hang on the appliance or allow children or animals to do so.
Serious injury could occur or the appliance could be damaged.
• Do not use combustible spray or place volatile or ammable substances near the
appliance. They might catch re.
• Keep the area around the appliance clean. Dirt, dust, or insects in the appliance
could cause harm to individuals or damage to the appliance.
Additional Warning for Remote Models
• THE REMOTE CONDENSER UNIT MUST BE GROUNDED. The power supply and
ground connection to the remote condenser unit are supplied from the icemaker.
Failure to properly ground the remote condenser unit could result in death or
serious injury.
• Wire routing (conduit) and disconnect (if required) must meet national, state, and
local electrical code requirements. Failure to meet these code requirements could
result in death, electric shock, serious injury, re, or damage.
• Move the icemaker control switch to the "OFF" position and turn off the power
supply to the icemaker before servicing the remote condenser unit.
Lockout/Tagout to prevent the power supply from being turned back on
inadvertently.
NOTICE
• Follow the instructions in this manual carefully to reduce the risk of costly water
damage.
• In areas where water damage is a concern, install in a contained area with a oor
drain.
• Install the appliance in a location that stays above freezing. Normal operating
ambient temperature must be within 45°F to 100°F (7°C to 38°C).
• Do not leave the appliance on during extended periods of non-use, extended
absences, or in sub-freezing temperatures. To properly prepare the appliance for
these occasions, follow the instructions in "VI. Preparing the Icemaker for Periods of
Non-Use."
• Do not place objects on top of the appliance.
• The dispenser unit/ice storage bin is for ice use only. Do not store anything else in
the dispenser unit/ice storage bin.

8
I. Construction and Water/Refrigeration Circuit Diagram
A. KM Construction
1. Air-Cooled Models (SAH/3)
Evaporator Assembly
Spray Tubes
Inlet Water Valve
Water Supply Inlet
Hot Gas Valve
Junction Box
Condenser
Check Valves
(refrigeration)
Control Box
Drier
Transformer Box (KM-1301SAH
Auxiliary Code D-1 and Later and
All 3 phase model)
Control Switch
Thermostatic
Bin Control
Compressor
Cleaning Valve
Float Switch
Water Pump
Check Valve
(water)
Thermostatic Expansion Valves
Liquid Line Valve
Fan Motor
Fan Blade
Low-Side Service Valve
High-Side Service Valve
Model Shown: KM-1301SAH3
High-Pressure
Switch

9
Evaporator Assembly
Spray Tubes
Inlet Water Valve
Water Supply Inlet
Hot Gas Valve
Junction Box
Water Regulating
Valve
Check Valves
(refrigeration)
Control Box
Liquid Line Valve
Drier
Control Switch
Bin Control Thermostat
Compressor
Cleaning Valve
Float Switch
Water Pump
Check Valve
(water)
Thermostatic
Expansion Valves
Water-Cooled
Condenser
Low-Side Service Valve
High-Side Service Valve
2. Water-Cooled Models (SWH/3/-M)
Model Shown: KM-1301SWH3
Transformer Box (KM-1301SWH
Auxiliary Code D-1 and Later and
All 3 phase model)

10
Evaporator Assembly
Spray Tubes
Inlet Water Valve
Water Supply Inlet
Hot Gas Valve
Junction Boxes
Receiver
Check Valves
(refrigeration)
Control Box
Liquid Line Valve
Drier
Control Switch
Bin Control Thermostat
Compressor
Cleaning Valve
Float Switch
Water Pump
Check Valve
(water)
Thermostatic
Expansion Valves
Low-Side Service Valve
High-Side Service Valve
High-Side Liquid Service Valve
Access Valve
3. Remote Models (SRH/3)
Model Shown: KM-1301SRH3
Note: KM-2500SRH3 Includes Headmaster (C.P.R.)
Transformer Box (KM-1301SRH
Auxiliary Code D-1 and Later and
All 3 phase model)

11
B. KMH Construction
1. Water-Cooled Models (SWH/3)
Evaporator Assembly
Spray Tubes
Inlet Water Valve
Float Switch
Water Pump
Water Supply Inlet
Junction Box
Water Regulating Valve
Check Valves
(refrigeration)
Control Box
Liquid Line Valve
Drier
Transformer Box
(3 phase model)
Control Switch
Bin Control Thermostat
Compressor
Cleaning Valve
Thermostatic
Expansion
Valves
Water-Cooled Condenser
Low-Side Service Valve
High-Side Service Valve
Hot Gas Valve
High-Pressure Switch
Check Valve
(water)
Model Shown: KMH-2000SWH3
Model Shown: KMH-2000SWH3

12
2. Remote Models (SRH/3)
Evaporator Assembly
Spray Tubes Inlet Water Valve
Float Switch
Water Pump
Water Supply Inlet
Junction Box
Check Valves
(refrigeration)
Control Box
Liquid Line Valve
Drier
Transformer Box
(3 phase model)
Control Switch
Bin Control Thermostat
Compressor
Cleaning Valve
Thermostatic
Expansion
Valves
Receiver
Low-Side Service Valve
High-Side Service Valve
Hot Gas Valve
High-Pressure Switch
Check Valve
(water)
Model Shown: KMH-2000SRH3
Model Shown: KMH-2000SRH3

13
Bin Control Bulb Holder
Z Bracket Used for Hoshizaki
B-1300, B-1500, B-1650, and
Non-Hoshizaki Ice Stoarage
Bin
C. Bin Control
1a. Single Thermostatic Bin Control
1b. Stacked Thermostatic Bin Control
Bin Control Bulb Holder E
Bin Control Bulb Holder F
Bin Control Bulb Holder G
Spacer
Bin Control Bulb Holder C
Bin Control
Extension Bracket
Silicone Hose
Z Bracket Used for Hoshizaki
B-1300, B-1500, B-1650, and
Non-Hoshizaki Ice Stoarage
Bin
Bin Control Bulb Holder E
Bin Control Bulb Holder F
Bin Control Bulb Holder G
Spacer
Bin Control Bulb Holder C
Bin Control
Extension Bracket
Silicone Hose
Upper Bin Control Bulb Holder
Lower Bin Control Bulb Holder
Lower Bin Control Bulb Holder
Upper Bin Control Bulb Holder

14
Upper Unit Wire Harness
Connector B (not used)
Bin Control
Cable
Bracket
Control Board
Red K4 Connector
Upper Unit Wire Harness
Wire Saddle
Lower Unit Wire Harness Connector B to
Upper Unit Wire Harness Connector A
Lower
Unit Wire
Harness
Control Board
Red K4 Connector
Upper Unit Connection Overview Upper Unit Connection Detail
See "II.D.1. Dispenser
Unit/Ice Storage Bin
and Icemaker Setup"
and "II.D.2. Bin Control
Installation" for the
Lower Unit Connection
Control Board
Red K4 Connector
Lower Unit Wire Harness
Connector B
Upper Unit
Wire Harness
Connector A
Upper Unit Wire Harness
Connector B (not used)
Wire Harness
Connector A
Bin Control
Cable Connector
Connection Detail
Control Board
Red K4 Connector
Bin Control Assembly
Thumbscrews
Bin Control Bracket
Bin Control
Cable Bracket
Control Board
Red K4 Connector
Wire Harness
Wire Saddle
Bin Control Cable
Bin Control Cable Connector to
Wire Harness Connector A
Wire Harness
Connector B
(for upper unit)
Mechanical Bin Control Connection Overview
Wire Harness
Connector B
(for upper unit)
2a. Single Mechanical Bin Control
2b. Stacked Mechanical Bin Control

15
D. Water/Refrigeration Circuit Diagram
1. Air-Cooled Models (SAH/3)
Water Supply
Cleaning Valve
Float Switch
Drain
Check Valve
Thermostatic Expansion Valves
Compressor
Hot Gas Valve
Check Valves
High-Pressure Switch
Strainer
Drier
Condenser
Evaporator
Service Valve
Discharge Line
Suction Line
Water Pump
Thermistor
Spray Tubes
Inlet Water Valve
Pump-Out
Water Tank
Service Valve
Refrigeration Circuit
Water Circuit
Liquid Line Valve
Spray Tubes
Fan
Heat Exchanger
Freeze/Harvest Pump Timer

16
2. Water-Cooled Models (SWH/3/-M)
Water Supply
Cleaning Valve
Float Switch
Drain
Check Valve
Thermostatic Expansion Valves
Compressor
Hot Gas Valve
Check Valves
High-Pressure Switch
Strainer
Drier
Condenser
Evaporator
Service Valve
Discharge Line
Suction Line
Water Pump
Thermistor
Spray Tubes
Inlet Water Valve
Pump-Out
Water Tank
Service Valve
Refrigeration Circuit
Water Circuit
Liquid Line Valve
Spray Tubes
Water Supply
Drain/Return
Water Regulating Valve
Heat Exchanger
Freeze/Harvest Pump Timer

17
3a. Remote Models (SRH/3) Except KM-2500SRH3
Condenser Unit with Headmaster (CPR)
Water Supply
Cleaning Valve
Float Switch
Drain
Check Valve
Expansion Valves
Compressor
Hot Gas Valve
Check Valves
High Pressure Switch
Strainer
Drier
Condenser
Evaporator
Service Valve
Discharge Line
Suction Line
Water Pump
Thermistor
Spray Tubes
Inlet Water Valve
Freeze/Harvest Pump Timer
Pump-Out
Water Tank
Service Valve
Refrigeration Circuit
Water Circuit
Fan
Headmaster (C.P.R.)
Liquid Line Valve
Receiver
Fusible Plug
Service Valve
Spray Tubes
Heat Exchanger
KM-2500SRH3: Headmaster located in icemaker

18
3b. Remote Models (SRH3) KM-2500SRH3
Condenser Unit without Headmaster (CPR)
Water Supply
Cleaning Valve
Float Switch
Drain
Check Valve
Expansion Valves
Compressor
Hot Gas Valve
Check Valves
High-Pressure Switch
Strainer
Drier
Condenser
Evaporator
Service Valve
Discharge Line
Suction Line
Water Pump
Thermistor
Spray Tubes
Inlet Water Valve
Freeze Pump-Out
Water Tank
Service Valve
Refrigeration Circuit
Water Circuit
Fan
Headmaster (C.P.R.)
Liquid Line Valve
Receiver Fusible Plug
Shut-Off Valve (Factory Use Only)
Service Valve

19
II. Sequence of Operation and Service Diagnosis
A. Sequence of Operation Flow Chart
1. "E" and "G" Control Board without Harvest Pump Timer Operation
Components Energized when the Control Switch is in the "WASH" Position The "WASH" position on the control switch is used when cleaning and sanitizing the icemaker. When in the "WASH" position, power is supplied to the pump motor. With the cleaning valve closed, the cleaner and sanitizer ow over the outside of the evaporator plate assembly. With the cleaning valve open, the cleaner and sanitizer ow over both the outside and the inside of the evaporator plate assembly. Note: Close the cleaning valve after cleaning and sanitizing are complete, otherwise the icemaker will not restart when the control switch is placed in the "ICE" position.
Legend: BC–bin control Comp–compressor FM–fan motor FMR–fan motor-remote FS–oat switch HGV–hot gas valve LLV–liquid line valve PM–pump motor WV–inlet water valve
• Max. WV time: 6 min. • Max. harvest time: 20 min.
FS check
1 to 3-min. harvest timer in control (S4 dip switch 1 & 2)
"E" and "G" Control Board without Harvest Pump Timer Operation Flow Chart
1. 1-Minute Fill Cycle
Cycle Steps
2. Harvest Cycle
Thermistor in control
3. Freeze Cycle
• Min. freeze time: 5 min. • Max. freeze time: freeze timer
setting
(S4 dip switch 9 & 10)
FS in control
4. Pump-Out Cycle
• Factory set for every
10th cycle (S4 dip switch 5 & 6)
• Pump motor stops for
2 sec., then reverses for 10/20 sec. (S4 dip switch 3 & 4)
WV energized
FS open
Comp energized FMR energized HGV energized WV energized
Thermistor temperature reaches 48°F (9°C) (3.9kΩ or less). Harvest timer starts (1 to 3 min.).
FS open
Comp continues FMR continues FM energized LLV energized PM energized HGV de-energized WV de-energized
FS closed
Comp continues FMR continues HGV energized PM de-energizes for 2 sec., then reverses for 10/20 sec. FM de-energized LLV de-energized
FS check
Startup
If FS is open, Comp stops and cycle returns to 1-min. ll.
5-min. timer in control
FS closed
FS opens or freeze timer terminates

20
• WV time: 6 min. or the length of harvest minus 50
sec. (S4 dip switch 7), whichever is shorter. Do not adjust S4 dip switch 7 out of the factory position.
• Max. harvest time: 20 min.
FS check
1 to 3-min. harvest timer in control (S4 dip switch 1 & 2)
Legend: BC–bin control Comp–compressor FM–fan motor FMR–fan motor-remote FS–oat switch HGV–hot gas valve LLV–liquid line valve PM–pump motor WV–inlet water valve
Components Energized when the Control Switch is in the "WASH" Position The "WASH" position on the control switch is used when cleaning and sanitizing the unit. When in the "WASH" position, power is supplied to the pump motor. With the cleaning valve closed, the cleaner and sanitizer ow over the outside of the evaporator plate assembly. With the cleaning valve open, the cleaner and sanitizer ow over both the outside and the inside of the evaporator plate assembly. Note: Close the cleaning valve after cleaning and sanitizing are complete, otherwise the unit will not restart when the control switch is placed in the "ICE" position.
"G" Control Board with Harvest Pump Timer Operation Flow Chart
1. 1-Minute
Fill Cycle
Cycle Steps
2. Harvest Cycle
Thermistor in control
3. Freeze Cycle
• Min. freeze time: 5 min. • Max. freeze time: freeze timer setting
(S4 dip switch 9 & 10)
FS in control
4. Pump-Out Cycle
• Factory set for every
10th cycle (S4 dip switch 5 & 6)
• Pump motor stops for
2 sec., then reverses for 10/20 sec. (S4 dip switch 3 & 4)
WV energized
FS open
Comp energized FMR energized HGV energized WV energized
Thermistor temperature reaches 48°F (9°C) (3.9 kΩ or less). Harvest timer starts. FS open
Comp continues FM continues FMR continues PM continues LLV energized HGV de-energized
FS closed
Comp continues FMR continues HGV energized PM de-energizes for 2 sec., then reverses for 10/20 sec. FM de-energized (FM continues on KM-1601SAH) LLV de-energized
FS check
Startup
If FS is open, Comp stops and cycle returns to 1-Min. ll.
5-min. timer in control
FS closed FS opens or
freeze timer terminates
50 sec.
PM energized WV de-energized
Harvest Pump Timer
2. "G" Control Board with Harvest Pump Timer Operation