How it Works
Hoshizaki
Loading...
KM1400SWHM
Service Manual
113 pgs9.38 Mb0
User Manual
101 pgs6.22 Mb0
Specsheet
2 pgs291.73 Kb0
Parts List
13 pgs1.39 Mb0
Instruction Manual
24 pgs1.71 Mb0
Warranty
1 pgs982.39 Kb0
Table of contents
Loading...

Hoshizaki KM1900SAH, KM1601SAH3, KM1601SWH3, KM1601SRH3, KM1601SRH Service Manual

...
Hoshizaki America, Inc.
Hoshizaki
Stackable Crescent Cuber
Models KM-1301SAH/3, SWH/3, SRH/3 KM-1400SWH-M, SWH3-M KM-1601SAH/3, SWH/3, SRH/3
“A Superior Degree
of Reliability”
www.hoshizaki.com
KM-1900SAH/3, SWH/3, SRH/3 KM-2100SWH3, SRH3 KM-2500SWH3, SRH3 KMH-2000SWH/3, SRH/3
SERVICE MANUAL
Number: 73208 Issued: 7-7-2015 Revised: 8-11-2015
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: 1-800-233-1940; (770) 487-2331 Fax: 1-800-843-1056; (770) 487-3360
E-mail: techsupport@hoshizaki.com
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.
2
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.
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
3
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
4
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
5

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.
6
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.
7

I. Construction and Water/Refrigeration Circuit Diagram

A. KM Construction

1. Air-Cooled Models (SAH/3)

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

2. Water-Cooled Models (SWH/3/-M)

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

3. Remote Models (SRH/3)

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

B. KMH Construction

1. Water-Cooled Models (SWH/3)

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

2. Remote Models (SRH/3)

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

C. Bin Control

1a. Single Thermostatic Bin Control

Bin Control Bulb Holder C
Bin Control Bulb Holder E Bin Control Bulb Holder F Bin Control Bulb Holder G Spacer
Bin Control Extension Bracket
Z Bracket Used for Hoshizaki B-1300, B-1500, B-1650, and Non-Hoshizaki Ice Stoarage Bin

1b. Stacked Thermostatic Bin Control

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

2a. Single Mechanical Bin Control

Mechanical Bin Control Connection Overview
Wire Harness Connector B (for upper unit)
Thumbscrews
Bin Control Cable Connector to Wire Harness Connector A
Wire Harness
Control Board Red K4 Connector
Bin Control Bracket
Bin Control Assembly
Bin Control Cable

2b. Stacked Mechanical Bin Control

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

D. Water/Refrigeration Circuit Diagram

1. Air-Cooled Models (SAH/3)

Hot Gas
Val ve
High-Pressure
Switch
Check
Valves
Strainer
Drier
Suction Line
Fan
Condenser
Water Supply
Inlet Water Valve
Spray Tubes
Cleaning Valve
Liquid Line
Thermistor
Val ve
Heat Exchanger
Service
Val ve
Service
Val ve
Float Switch
Check Valve
Discharge Line
Compressor
Thermostatic Expansion Valves
Drain
Water Pump
Pump-Out
Spray Tubes
Evaporator
15
Water
Tank
Freeze/Harvest
Pump Timer
Refrigeration Circuit
Water Circuit

2. Water-Cooled Models (SWH/3/-M)

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

3a. Remote Models (SRH/3) Except KM-2500SRH3

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

3b. Remote Models (SRH3) KM-2500SRH3

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

II. Sequence of Operation and Service Diagnosis

A. Sequence of Operation Flow Chart

1. "E" and "G" Control Board without Harvest Pump Timer Operation

10th cycle
(S4 dip switch 5 & 6)
2 sec., then reverses
for 10/20 sec. (S4 dip
• Factory set for every
4. Pump-Out Cycle
• Pump motor stops for
switch 3 & 4)
FS in control
Comp continues
FMR continues
HGV energized
FS opens or
freeze timer
terminates
PM de-energizes for 2 sec.,
then reverses for 10/20 sec.
FM de-energized
LLV de-energized
3. Freeze Cycle
2. Harvest Cycle
• Min. freeze time: 5 min.
• Max. freeze time: freeze timer
• Max. WV time: 6 min.
• Max. harvest time: 20 min.
setting
(S4 dip switch 9 & 10)
5-min. timer in
control
1 to 3-min. harvest
timer in control
(S4 dip switch 1 & 2)
Thermistor
in control
FS closed
FS check
Thermistor temperature
FS closed
FS check
Comp continues
FMR continues
reaches 48°F (9°C)
(3.9kΩ or less). Harvest
Comp energized
FMR energized
FM energized
LLV energized
FS open
timer starts (1 to 3 min.).
HGV energized
WV energized
FS open
PM energized
HGV de-energized
WV de-energized
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.
Startup
WV energized
If FS is open, Comp stops and cycle returns to 1-min. ll.
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
1. 1-Minute
Fill Cycle
"E" and "G" Control Board without Harvest Pump Timer Operation Flow Chart
Cycle
Steps
19

2. "G" Control Board with Harvest Pump Timer Operation

10th cycle
(S4 dip switch 5 & 6)
2 sec., then reverses
for 10/20 sec.
• Factory set for every
4. Pump-Out Cycle
• Pump motor stops for
(S4 dip switch 3 & 4)
FS in control
Comp continues
FMR continues
HGV energized
FS opens or
freeze timer
terminates
PM de-energizes for 2 sec.,
then reverses for 10/20 sec.
FM de-energized
(FM continues on KM-1601SAH)
LLV de-energized
50 sec.
Timer
FS closed
Comp continues
FS check
PM energized
WV de-energized
FS closed
Comp energized
FS check
WV energized
FM continues
FMR continues
Thermistor temperature
reaches 48°F (9°C)
FMR energized
HGV energized
FS open
(3.9 kΩ or less).
PM continues
WV energized
LLV energized
FS open
Harvest timer starts.
HGV de-energized
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.
If FS is open, Comp stops and cycle returns to 1-Min. ll.
(S4 dip switch 9 & 10)
• Min. freeze time: 5 min.
• Max. freeze time: freeze timer setting
3. Freeze Cycle
"G" Control Board with Harvest Pump Timer Operation Flow Chart
2. Harvest Cycle
1. 1-Minute
sec. (S4 dip switch 7), whichever is shorter. Do not
• WV time: 6 min. or the length of harvest minus 50
Fill Cycle
adjust S4 dip switch 7 out of the factory position.
• Max. harvest time: 20 min.
5-min. timer
in control
1 to 3-min. harvest timer in
control (S4 dip switch 1 & 2)
Thermistor
in control
Harvest Pump
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
Cycle
Steps
Startup
WV–inlet water valve
20

3a. Thermostatic Bin Control Shutdown

To 1. 1-Minute Fill Cycle
3. Ice Level Lowered
No ice touching TBC bulb.
Icemaker starts at
"1. 1-Minute Fill Cycle."
2. Icemaker Off
1. Bin Full
Shutdown
TBC closed
All components
de-energized.
TBC open
All components
de-energized
NOTE: "G" control board green "BC CLOSED" LED
on continuously when the K4 jumper is in place.
Within 10 sec. after ice contacts
TBC bulb, icemaker shuts down.
Ice contacts TBC bulb
TBC
and Restart
Operation
"E" and "G" Control Board with Thermostatic Bin Control Shutdown Sequence Flow Chart
Legend:
BC–bin control
TBC–themostatic bin control
21

3b. Mechanical Bin Control Shutdown

Icemaker starts at
"1. 1-Minute Fill Cycle."
3. Ice Level Lowered
To 1. 1-Minute Fill Cycle
MBC closed
(MBC actuator paddle disengaged)
Green "BC CLOSED" LED on
Yellow "BC OPEN" LED off
2. Icemaker Off
All components
de-energized.
Yellow "BC OPEN" LED continues.
All components de-energized.
to 15 sec. into the freeze cycle if
activated at the end of the harvest cycle.
15 sec. before the 5-min. short cycle
• Fill Cycle–15 sec. after activation.
• Harvest Cycle–At the end of the harvest cycle, or up
"G" Control Board Mechanical Bin Control Shutdown Sequence Flow Chart
1. Bin Full
Shutdown Delay:
protection timer terminates.
• Freeze Cycle– 15 sec. after activation if activated at least
Otherwise, at the end of the next harvest cycle.
MBC open (MBC actuator paddle engaged)
Green "BC CLOSED" LED off
Yellow "BC OPEN" LED on
Shutdown
Legend:
BC–bin control
MBC
and Restart
Operation
MBC–mechanical bin control
22

B. Service Diagnosis

WARNING
• The appliance should be diagnosed and repaired only by qualied service personnel to reduce the risk of death, electric shock, serious injury, or re.
• Risk of electric shock. Control switch in "OFF" position does not de-energize all loads Use extreme caution and exercise safe electrical practices.
• Moving parts (e.g., fan blade) can crush and cut. Keep hands clear.
• Before servicing the appliance, move the control switch to the "OFF" position and turn off the power supply.
• CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are securely in place after the appliance is serviced. Make sure that none have fallen into the dispenser unit/ice storage bin.
• Make sure all food zones in the appliance and dispenser unit/ice storage bin are clean after service.
The diagnostic procedure is a sequence check that allows you to diagnose the electrical system and components. Before proceeding, check for correct installation, proper voltage per nameplate, and adequate water supply. Check CB using the steps in "II.C. Control Board Check." Check dip switch settings to assure that S4 dip switch 3, 4, 7, 8, 9, 10 and S5 dip switch 1 through 5 ("G" CB) are in the factory default position. S4 dip switch 1, 2, 5, 6 are cleaning adjustments and the settings are exible. For factory default settings, see "III.C.1. Default Dip Switch Settings."
Note: • When checking high voltage (115VAC), always choose a white (W) neutral wire to
establish a good neutral connection.
• On models with a main transformer, the neutral (W) is provided through MT. To conrm a good neutral, check for 60VAC from white (W) neutral to ground (GND). If 60VAC is present, neutral is good. If 60VAC is not present, check 208-230VAC main power supply to MT. If 208-230VAC is present, check MT continuity.
• When checking voltage from the CB K1 connector (10 pin connector), pull CB K1connector out slightly to allow room for multimeter test leads contact.
1) Turn off the power supply, then access the control box. Move the control switch to the "OFF" position. Clear any ice from TBC.
2) Check that BC is closed and the 115VAC 10A fuse is good.
23

1. "E" and "G" Control Board without Harvest Pump Timer Diagnosis

3) Power On: Turn on the power supply, then move the control switch to the "ICE" position. A 5-sec. delay occurs.
• "E" Control Board: CB red "POWER OK" LED turns on.
• "G" Control Board: CB red "POWER OK" LED and green "BC CLOSED" LEDturn on.
Note: • CB red "POWER" LED remains on unless the 10.5VAC power supply is
interrupted (K2 connector).
• Check CB using the steps in "II.C. Control Board Check."
• "G" CB: If yellow "BC OPEN" LED is on, check that CB red K4jumper is in place.
a) Power On Diagnosis: If CB red "POWER OK" LED is off, conrm closed TBC and
10A fuse is good. If TBC is open, remove ice from bulb and warm bulb in hand. IfTBC does not close, replace TBC. See "II.D. Bin Control Check." Check for 115VAC at control switch #1(BK) to neutral (W) then at control switch #2(P) to neutral (W). If115VAC is present on control switch #1 (BK) and not on control switch #2(P), replace control switch. If 115VAC is present on control switch #2 (P), check for 115VAC at HPS (P) to neutral (W), then HPS (BK) to neutral (W). If115VAC is present at HPS (P) and not at HPS (BK), HPS is open. See HPS Diagnosis below. If115VAC is present at HPS (BK), check for 10.5VAC at CB K2#1 (R) to CB K2#2(R). If10.5VAC is not present, conrm that the cleaning valve interlock switch is closed. Next, check CT continuity. Ifopen, replace CT.
b) HPS Diagnosis: Conrm FM is energized and fan blade turns freely. Conrm
condenser coil is not dirty. Conrm that the location meets installation requirements. See the appliance's instruction manual for details. Conrm there are no restrictions in the refrigeration circuit. Harvest Cycle: HGV, strainer, or check valve. Freeze Cycle: FM, FMR, TXV, HM, LLV, WRV, strainer, check valve, drier, damaged line set or tting, and fan blade for binding. Let refrigeration circuit pressures equalize. If HPS does not reset and pressures are equalized, replace HPS. If pressures are not equalized, reclaim refrigerant and diagnose refrigeration circuit restriction.
4) 1-Minute Fill Cycle – LED 4 is on. WV energizes. After 1 min., CB checks for a closed
FS. If FS is closed, harvest cycle begins. If harvest cycle begins (Comp, HGV, and FMR energize), continue to step 5. If FS is open, WV remains energized through additional 1-min. ll cycles until water enters the water tank and FS closes (low water safety protection during initial start up and at the end of each harvest). Diagnosis: Check that water enters the water tank. If not, check that the water supply line shut-off valve is open and screens or external lters are clear. Check for 115VAC at CB K1 #6(O) to neutral(W). If 115VAC is not present, replace CB. If 115VAC is present, and WV does not energize, check for 115VAC at WV. If 115VAC is present, check coil continuity. Ifopen, replace WV. If the water tank lls, but the appliance fails to start harvest (Comp energized), check for open FS. See "II.E. Float Switch Check and Cleaning." If FS is closed and CB fails to start the harvest cycle after 1 min., replace CB.
24
5) Initial Harvest Cycle – LEDs 1, 4, and 2 are on. WV continues. Comp, FMR, and HGV energize. CB monitors the warming of the evaporator via the thermistor located on the suction line. When the thermistor reaches 48°F (9°C), CB reads 3.9 kΩ from the thermistor and turns harvest termination over to the harvest timer (S4 dip switch 1 & 2). The harvest timer has settings of 60, 90, 120, and 180sec. Thepump-out timer (S4dip switch 3 & 4) acts in place of the harvest timer during cycles with a pump-out (S4 dip switch 5 & 6). WV remains energized during harvest for a maximum of 6min. or the length of harvest, whichever is shorter.
a) Comp Diagnosis: Check that evaporator is warming. Ifnot, conrm that Comp
energizes. If not, check for 115VAC at CB K1 #1 (V) or #9 (V) to neutral (W). If115VAC is not present, check for 115VAC at CB K1 #7 (BR) or #10 (BR) to neutral (W). If115VAC is present at CB #7 (BR) or #10 (BR) and not at CB #1 (V) or #9 (V), replace CB. If 115VAC is present, check for 115VAC at MC solenoid. If 115VAC is present, conrm contacts are closed. If not, replace MC. If MC contacts are closed, check Comp start and run capacitors, Comp start relay, and Comp motor winding.
b) HGV Diagnosis: If Comp is energized and evaporator is not warming, check that
HGV energizes and opens. Check for 115VAC at CB K1 #2 (P) to neutral (W). If115VAC is not present, replace CB. If 115VAC is present, check for 115VAC at HGV coil and check HGV coil continuity. Replace as needed.
c) LLV Diagnosis: Conrm that LLV is de-energized and closed (not bypassing).
Ifenergized, replace CB. If de-energized and bypassing, replace LLV.
d) WRV Diagnosis: Conrm WRV is not leaking by.
e) Initial Harvest Cycle Termination Diagnosis: When the thermistor reaches 48°F
(9°C), CB reads 3.9 kΩ from the thermistor and turns harvest termination over to the harvest timer (S4 dip switch 1 & 2). Check discharge line temperature. For a thermistor check, see "II.F.Thermistor Check." If 1-min. ll cycle starts after harvest timer terminates, check that FS is clean and operating properly. See "II.E. Float Switch Check and Cleaning." If FS is closed, CB proceeds to the next cycle. Ifnot, replace CB.
Note: The min. total time allowed by CB for a complete harvest cycle is 2 min.
Max. harvest time allowed is 20 min.
NOTICE! On models with "G" control board and no harvest pump timer relays, S4dip switch 7 must remain off. Otherwise, PM energizes in reverse direction the last 50 seconds of harvest and empties water from water tank.
6) Freeze Cycle – LED 1 is on. Comp and FMR continue. PM, FM, and LLVenergize. WV and HGV de-energize. Appliance is held in freeze by a 5-min. short cycle protection timer. After 5-min. timer terminates and FSopens, freeze cycle terminates.
a) Freeze Cycle Diagnosis: Conrm Comp and FMR continue. Conrm that PM, FM,
and LLV energize. Conrm WRV opens. Next, conrm WV and HGV de-energize. During the rst 5 min. of freeze, conrm evaporator is cooling. If not, conrm WV de-energized (not leaking by), HGV de-energized (not bypassing), LLV and FM energize, TXV and HM operate correctly, WRV opens, Comp is efficient, and refrigerant charge is correct. See "VIII.A. Specication and Performance Data."
25
b) Comp and FMR Diagnosis: If Comp and FMR de-energize once freeze begins,
check that appliance has not shut off on HPS ("POWER OK" LED off). If so, check "3)b) HPS Diagnosis" above. If "POWER OK" LED is on, check for 115VAC at CB K1#1 (V) or #9 (V) to neutral (W). If 115VAC is not present and LED 1 is on, replace CB. If 115VAC is present, check for 115VAC at CR or MC coil. If 115VAC is present, check CR or MC coil and contact continuity. Replace as needed. If CR or MC is ok, check Comp external overload, start relay, and start and run capacitors. Next, check Comp motor winding continuity. If Comp is energized but evaporator is not cooling, check for an inefficient Comp. See "VIII.A. Specication and Performance Data." If Comp is energized but FMR is not, check for 115VAC at the FMR junction box. If115VAC is not present, check icemaker wiring connections. If 115VAC is present, check for voltage at condenser unit. If115VAC is not present, check eld wiring connections. If 115VAC is present, check FMR capacitor, motor winding, and fan blade for binding.
c) WV and HGV Diagnosis: If WV is energized, check for 115VAC at CB K1 #6 (O) to
neutral (W). If 115VAC is present after PM energizes, replace CB. If 115VAC is not present, replace WV (bypassing). If HGV did not de-energize, check for 115VAC at CB K1 #2 (P) to neutral (W). If 115VAC is present after PM energizes, replace CB. If115VAC is not present, replace HGV (bypassing).
d) PM Diagnosis: Conrm water is owing over evaporator from PM and not WV. If PM
de-energizes once freeze begins, check for 115VAC at CB K1 #4 (R) to neutral (W). If 115VAC is not present, replace CB. If 115VAC is present and PM is de-energized, check for 115VAC at control switch #5 (R) to neutral (W). If 115VAC is present at CB K1 #4 (R) and not at control switch #5 (R), check control switch continuity between #5 (R) and #4 (R). Replace as needed. If 115VAC is present at control switch #5(R) to neutral (W), check PM impeller for binding, PM capacitor, and motor winding continuity.
e) FM and LLV Diagnosis: If FM or LLV does not energize, check for 115VAC at CB
K1#3 (BK) to neutral (W). If 115VAC is not present, replace CB. If 115VAC is present: For FM: check capacitor, motor winding, and blade for binding. For LLV: check coil voltage and continuity.
f) Refrigerant Pressures, HM, and TXV Diagnosis: If evaporator is still not cooling,
check refrigerant pressures. See "VIII.A. Specication and Performance Data." Next, check HM operation. If refrigeration pressures are above HM setpoint and HMis bypassing, replace HM. Check TXV for proper operation. Remove TXV bulb and hold it in your hand, refrigerant low-side pressure should rise, place TXV bulb in ice water, refrigerant low-side pressure should drop. A 10 to 15 pound pressure swing between warm and cold conditions indicate a good TXV. If a 10 to 15pound swing is not present, replace TXV.
g) WRV Diagnosis: WRV is factory set and generally no adjustment is required.
IfWRV fails to open in freeze, check for proper refrigerant pressures. See "VIII.A. Specication and Performance Data." If refrigerant pressures are correct and WRV does not open, adjust or replace as needed. See "IV.C. Water Regulating Valve Adjustment (water-cooled models)."
26
h) Freeze Termination Diagnosis: After 5 min. in freeze, disconnect CB K5 FS
connector. 15 sec. later appliance should switch out of the freeze cycle (15 second delay after FS opens before terminating the freeze cycle). If appliance remains in freeze longer than 15 sec. after FS removed, replace CB. If appliance switches with FS removed but would previously not switch out of freeze with FS connected (long freeze - 3 beep alarm), see "II.E. Float Switch Check and Cleaning."
Note: Normal freeze cycle will last 20 to 40 min. depending on model and conditions.
Cycle times and pressures should follow performance data provided in this manual. See "VIII.A. Specication and Performance Data."
i) Short Freeze Cycle Diagnosis: Conrm water tank lls and overows during 1 min.
ll and harvest cycles. If not, check water supply lters, shut-off valve, WV screen. Ifwater tank empties before 5 min. timer terminates and freeze cycle is short, check that CV is not leaking by (water owing down the potable drain). If CV is leaking by, remove and clean CV, replace rubber seat and spring if necessary. If water tank is full, see "II.E. Float Switch Check and Cleaning" for erratic operating FS.
7) Pump-Out Cycle – LEDs 1, 3, and 2 are on (10/20 second pump-out). Timing of the rst pump-out is dependent on CB. "E" CB rst pump-out is after the rst freeze cycle. "G" CB rst pump-out is determined by S4 dip switch 5 & 6. See the table below.
"E" & "G" Control Board Settings 1st Pump-Out
S4 Dip Switch Setting
No. 5 No. 6
OFF OFF Every cycle After 1st freeze cycle After 2nd freeze cycle
ON OFF Every 2 cycles After 3rd freeze cycle
OFF ON Every 5 cycles After 6th freeze cycle
ON ON Every 10 cycles After 11th freeze cycle
Pump-Out Frequency
"E" Control Board "G" Control Board
Comp and FMR continue, HGV energizes. If S4dip switch 3 & 4 are set to 3 off and 4on, LED 4 turns on and WV energizes. FM and LLVde-energize. PM stops for 2 sec., then reverses for 10/20 sec. depending on pump-out timer (S4 dip switch 3 & 4) setting. When the pump-out timer terminates, pump-out is complete. The pump-out frequency control (S4 dip switch 5 & 6) is factory set, and generally no adjustment is required. However, the pump-out frequency control can be set to have a pump-out occur every cycle, or every 2, 5, or 10 cycles. For details, see "III.C.4. Pump-Out Frequency Control (S4 dip switch 5 & 6)."
Pump-Out Diagnosis: In the freeze cycle before pump-out (see table above), disconnect CB black K5 connector (FS connector) after 5 min. of freeze. Check that PM stops and re-starts and water is owing down the drain through CV. If PM does not stop and re-start, check that CB LEDs 1, 3, and 2 are on. If not, replace CB. IfLEDs1,3, and 2 are on and PM does not energize, check for 115VAC at CB K1 #5 (DBU) to neutral (W). If 115VAC is not present, replace CB. If 115VAC is present, make sure the drain line is not clogged and that CV is clean and operating properly.
Conrm FM and LLV de-energize. If FM or LLV is energized with LEDs 1, 3, and 2 on, replace CB.
27
8) Normal Harvest Cycle – Same as the initial harvest cycle. Return to step 5 above. Note: Appliance continues to cycle until BC is satised or power is turned off. The
appliance always restarts at the 1-min. ll cycle.
9) Shutdown: "E" and "G" Control Board
When the appliance is running, hold ice in contact with the thermostatic bulb. TBC switch opens within 10 sec., shutting down the appliance. TBC is factory set, and generally no adjustment is required. However, adjustment may be needed in some conditions, particularly at higher altitude locations. Diagnosis: See "II.D. Bin Control Check." NOTICE! Donot adjust S4 dip switch 7 out of the factory
default position. This dip switch must be left in the factory default position or the appliance will not operate correctly. "G" Control Board: CB red K4connector must have the jumper in place. When the
jumper is in place, the green "BC CLOSED" LED remains on. If the jumper is not in place, yellow "BC OPEN" LED turns on and the icemaker turns off and remains off until the jumper is replaced in its original position.
Legend: BC–bin control; CB–control board; CR–compressor relay; CT–control transformer;
Comp–compressor; CV–check valve; FM–fan motor; FMR–fan motor-remote; FS–oat switch; HGV–hot gas valve; HM–headmaster (C.P.R.); HPS–high-pressure switch; LLV–liquid line valve; MC–magnetic contactor; MT–main transformer; PM–pump motor; TBC–thermostatic bin control; TXV–thermostatic expansion
valve; WRV–water regulating valve; WV–inlet water valve
28

2. "G" Control Board with Harvest Pump Timer Diagnosis

3) Power On: Turn on the power supply, then move the control switch to the "ICE" position. A 5-sec. delay occurs. CB red "POWER OK" LED and green "BC CLOSED" LED turn on. If yellow "BC OPEN" LED is on, check CB K4 jumper.
Note: • CB red "POWER OK" LED remains on unless the 10.5VAC power supply is
interrupted (K2 connector).
• Check CB using the steps in "II.C. Control Board Check."
• Conrm CB green "BC CLOSED" LED is on. If CB yellow "BC OPEN" LED is on, conrm CB K4 jumper is in place. Otherwise, CB yellow "BC OPEN" LED is on and appliance will not start.
a) Power On Diagnosis: If CB red "POWER OK" LED is off, conrm 10A fuse is good.
Check for 115VAC at control switch #1 (BR or BK) to neutral (W) then at control switch #2(P) to neutral (W). If 115VAC is present on #1 (BR or BK) and not on #2(P), replace control switch. If 115VAC is present on control switch #2 (P), check for 115VAC at HPS (P) to neutral (W) then HPS (BK) to neutral (W). If115VAC is present at HPS (P) and not at HPS (BK), HPS is open. See HPS Diagnosis below. If115VAC is present at HPS (BK), check for 10.5VAC at CB K2#1 red wire to CB K2 #2 red wire. If 10.5VAC is not present, check that the cleaning valve interlock switch is closed. Next, check CT continuity. If open, replace CT.
b) HPS Diagnosis: Conrm FM is energized and fan blade turns freely. Conrm
condenser coil is not dirty. Conrm that the location meets installation requirements. See the appliance's instruction manual for details. Conrm there are no restrictions in the refrigeration circuit. Harvest Cycle: HGV, strainer, or check valve. Freeze Cycle: FM, FMR, TXV, HM, LLV, WRV, strainer, check valve, drier, damaged line set or tting, and fan blade for binding. Let refrigeration circuit pressures equalize. If HPS does not reset and pressures are equalized, replace HPS. If pressures are not equalized, reclaim refrigerant and diagnose refrigeration circuit restriction.
4) 1-Min. Fill Cycle – LED 4 is on. WV and X11 relay energize. After 1 min., CB checks for a closed FS. If FS is closed, the harvest cycle begins. If harvest cycle begins (Comp, HGV, FMR energized), continue to step 5a. If FS is open, WV remains energized through additional 1-min. ll cycles until water enters the water tank and FS closes (low water safety protection during initial start up and at the end of each harvest). Diagnosis: Check that water enters the water tank. If not, check that the water supply line shut-off valve is open and screens or external lters are clear. Check for 115VAC at CB K1 #6 (O) to neutral (W). If 115VAC is not present, replace CB. If 115VAC is present, and WV does not energize, check for 115VAC at WV. If 115VAC is present, check coil continuity. Ifopen, replace WV. If the water tank lls, but the appliance fails to start harvest (Comp energized), check for open FS. See "II.E. Float Switch Check and Cleaning." If FS is closed and CB fails to start the harvest cycle after 1 min., replace CB.
29
5a) Initial Harvest Cycle – LEDs 1, 4, and 2 are on. WV and X11 relay continue. Comp,
FMR, HGV, and X10 relay energize. CBmonitors the warming of the evaporator via the thermistor located on the suction line. When the thermistor reaches 48°F (9°C), CB reads 3.9 kΩ from the thermistor and turns harvest termination over to the harvest timer (S4 dip switch 1 & 2). The harvest timer has settings of 60, 90, 120, and 180 sec. The pump-out timer (S4 dip switch 3 & 4) acts in place of the harvest timer during cycles with a pump-out (S4 dip switch 5 & 6). WV and X11 relay are energized during harvest for a maximum of 6 min. or the length of harvest minus 50sec., whichever is shorter. 50sec. before harvest terminates, PM energizes. See step 5b below.
a) Comp Diagnosis: Check that evaporator is warming. Ifnot, conrm that Comp
energizes. If not, check for 115VAC at CB K1 #1 (V) or #9 (V) to neutral (W). If115VAC is not present, check for 115VAC at CB K1 #7 (BR) or #10 (BR) to neutral (W). If115VAC is present at #7 (BR) or #10 (BR) and not at #1 (V) or #9 (V), replace CB. If 115VAC is present, check for 115VAC at CR or MC solenoid. If 115VAC is present, conrm contacts are closed. If not, replace CR or MC. If CR or MC contacts are closed, check Comp external overload, Comp start and run capacitors, Comp start relay, and Comp motor winding. If Comp is energized and evaporator is not warming, check that HGV energizes and opens. Check for 115VAC at CB K1 #2 (P) to a neutral(W). If 115VAC is not present and LED 2 is on, replace CB. If115VAC is present, check coil voltage and continuity. Replace as needed. Conrm that LLV is de-energized and closed (not bypassing). If energized, replace CB. Ifde-energized and bypassing, replace LLV. Conrm WRV is not leaking by. If evaporator is warming, PM energizes for the last 50sec. of harvest.
b) HGV Diagnosis: If Comp is energized and evaporator is not warming, check that
HGV energizes and opens. Check for 115VAC at CB K1 #2 (P) to neutral (W). If115VAC is not present, replace CB. If 115VAC is present, check for 115VAC at HGV coil and check HGV coil continuity. Replace as needed.
c) LLV Diagnosis: Conrm that LLV is de-energized and closed (not bypassing).
Ifenergized, replace CB. If de-energized and bypassing, replace LLV.
d) WRV Diagnosis: Conrm WRV is not leaking by.
5b) Harvest Pump Timer – LEDs 1, 3, and 2 are on. When the thermistor reaches 48°F
(9°C), CB reads 3.9 kΩ from the thermistor and turns harvest termination over to the harvest timer (S4 dip switch 1 & 2). 50 sec. before the harvest timer terminates, LED 3turns on and PM energizes. Comp, FMR, HGV, and X10 relay continue. LED 4 turns off, WV and X11 relay de-energize. Diagnosis: Place a thermometer on the suction line next to the thermistor. Has it warmed to 48°F (9°C) or warmer? Conrm thermistor status. See "II.F. Thermistor Check." If the thermistor reading is in proper range, dip switch 7 is on, and PM does not energize 50 sec. before harvest terminates, replace CB. If WV continues, check for 115VAC at CB K1 #6 (O). If115VAC is present, and LED 4 is off, replace CB. If LED 3is on and PM is not energized, check for 115VAC at CB K1 #5(DBU). If115VAC is not present, replace CB. If 115VAC is present and PM is not energized, check for 115VAC at X10relay terminal #7 (Y) to neutral (W). If 115VAC is not present, check for 115VAC at X10 relay terminal #3 (P) to neutral (W) and X10 relay terminal #5 (Y) to neutral (W).
30
Loading...
+ 83 hidden pages
Buy Points How it Works FAQ Contact Us Questions and Suggestions Privacy Policy Cookie Policy Terms of Use