SERVICE AND WIRING SHEET
W10492485 E
* Normal operating conditions are
viewed when the air temperature is
between 55 and 100 $ F (45 $ F to
100 $ F on KUIO models) .Best results
Electrical Shock Hazard
Disconnect power before servicing.
Replace all parts and panels before operating.
Failure to do so can result in death or
electrical shock.
HARVEST MODE
when air is between 70 and 90 $ F
NOTE:
Watt and pressure readings
Timing
Electronic Control
will vary and are influenced by the
existing condition of the appliance,
Time= 20 Seconds
such as iced-up evaporator, condition
of condenser, defrost cycle, pull-
12.8Vac
down time and customer use.
Bk
SERVICE INFORMATION ( W10492484 D )
Bu/Y1
Rd
Rd/Bk
1. REFRIGERANT CHARGE MUST BE APPLIED TO THE HIGH SIDE ONLY.
2.THE TRANSFORMER, CUTTER GRID AND ELECTRONIC CONTROL REMAIN ENERGIZED IN ON
MODE
Reservoir Drain Pump
& CLEAN MODE.
3.THE ELECTRONIC CONTROL REMAINS ENERGIZED IN OFF MODE.
120Vac
STRIP CIRCUITSThe following individual circuits are for use in diagnoses, and are shown
Do not continue with the diagnosis of the ice maker
Wh
Vi
Transformer
in the ON position.
Wh
if a fuse is blown, a circuit breaker is tripped,
or if there is less than a 120 volt power supply at
the wall outlet.
Hot Gas Solenoid
FLUSH MODE (Cycles once every time the unit is turned on)
120Vac
Timing
Bk
Rd
Wh
Electronic
Control
Fill reservoir or
Overload
T= 3 minutes
120Vac
Relay
Fill reservoir
volume to
Wh
Tn
Bk
Compressor
Wh
Tn
Bk
matching
thickness setting
or T = 3 min
Water Valve
Water Valve
Electronic
Electronic Control
12.8Vac
Bk
Control
Bu
Rd
Time= 1 minute
Rd/Bk
GY
Water Recirculattion Pump
120Vac
Wh
Time= 20 Seconds
CLEAN MODE
Bu/Y1
Rd/Bk
Transformer
Timing
Electronic Control
Reservoir Drain Pump
12.8Vac
Bk
120Vac
Rd/Bk
Time = 20 Min
Fill reservoir
Wh
Tn
Bk
Bu
Rd
Water Recirculation Pump
volume to
matching
thickness setting
Water Valve
120Vac
Wh
or 3 Minutes
Vi
Transformer
Wh
Electronic
Control
ICE MAKING MODE
Hot Gas Solenoid
Time = 20 Min
Electronic Control
120Vac
Bk
12.8Vac
Bk
Bu
Rd
Wh
Rd
Rd/Bk
Compressor
Overload
GY
Relay
Water Recirculating Pump
120Vac
Wh
120Vac
Bk
Wh/Rd
Wh
Transformer
Tn
Bk
Condenser Fan
Wh
Electronic
Water Valve
Control
Rd
12.8Vac
Wh
Overload
Electronic Control
Bu
Rd
Bk
Time = 3 Min
Rd/Bk
Relay
Compressor
Repeat 5 times
Water Circulation Pump
120Vac
SERVICE AND WIRING
SHEET NO.
SERVICE AND WIRING
SHEET NO.
Wh
SERVICE AND WIRING
SHEET NO.
Transformer
W10492485 E W10492485 E
Test #1 - Ice Bin Thermistor
1. Do not continue with the diagnosis of the ice maker if a fuse is blown, a
circuit breaker is tripped, or if there is less than a 120 volt power supply at
2. All units that have failed during the first few days of use should be
W10492485 E W10492485 E
the wall outlet.
2.7k ^
@ 25 $ C (77 $ F)
ICE BIN NOT FULL
checked for loose connections or miswiring.
TEMPERATURE
Bin>37 $ F
Entering and Navigating -- Manual Diagnostics
Turn the product on. Within 20 seconds of Power On press and hold the Clean
button then the ON button together. Release both buttons when all user
interface LEDs
begin to flash.
push MaxIce button
on the user interface. This begins the manual step through diagnostics.
If no button is pressed within 5 seconds then the product goes into the
automatic diagnostic mode used at the assembly plant. Each component is cycled
press the On button.
Component Steps
Max
Component
Time
5 sec
for 5 seconds.
On/Off LED
The controls will then automatically move to the first
Clean LED
CLEANING
COMPLETE
Bin Thermistor
2 Blinks=Open
OFF
OFF
OFF
OFF
OFF
ON Solid=OK
Evaporator Thermistor
UNIT
>=115 $ F # 1 $ 1.10k
F
^
COMPARTMENT
OFF
2 Blinks=Open
ON Solid=OK
Unit Thermistor
OFF
OFF
2 Blinks=Open
OFF
4 Blinks=Short
Water valve turns On until water is
5
1 min
On solid = reservoir full
detected by touch sensor or max
OFF
ON
Blinking = reservoir empty
OFF
time is reached.
6
Recirculation Pump
ON
ON
ON
OFF
7
Reservoir Drain Pump
ON
OFF
OFF
OFF
8
Compressor and Condenser Fan Motor
ON Solid while cooling
ON Solid while cooling
Off while cooling, evap therm > 4.5 $ F
9
Compressor and Hot Gas Valve
ON Solid while heating
ON Solid while heating
Blinking when evap thermistor <= 4.5 $ F
OFF
,full frost pattern should be visible
On solid while heating, evap therm < 12 $ F
OFF
Blinking when evap thermistor >= 12 $ F
2 Blinks = Thin
4 Blinks = Normal
10
Ice Thickness
OFF
OFF
6 Blinks = Thick
OFF
Press Clean button to cycle between settings.
11*
12*
* Steps 11
UI software version
ACU Software version
Blinks = numeric
Blinks = numeric value for
value for Major
Minor
Blinks = numeric
Blinks = numeric value for
value for Major
Minor
Blinks = numeric value for test
OFF
Blinks = numeric value for test
ON
& 12 are for manufacturing use only.
ERROR DISPLAYS
The On/Off LED blinking indicates a bin thermistor failure. Check that the bin
control box. Check that the bin thermistor is not open or shorted.
The On/Off LED and Max Ice LED blinking indicates a harvest failure.
Replace the
Check
sealed system tubing. If the thermistor is plugged in ensure that it is fully
evaporator thermistor is unplugged.) Check the resistance of the thermistor. If
#
1%
CONDENSER FAN OFF
TEMPERATURE
RESISTANCE
# 3%<114 $ F # 1 $ F1.17k ^
If water fill sensor is faulty the electronic control will continue to make ice
# 3%
will continue to harvest based on time instead of temperature.
thermistor is plugged in to the
thermistor if it is open or short.
that the evaporator thermistor is connected to the
connected to the control box.
(The ice maker will operate on a timed cycle if
the thermistor checks good then look for a frost pattern on the evaporator
based on time.The timed cycle is 25 minutes for ice making.
SERVICABLE ELECTRICAL PARTS MATRIX
4 Blinks=Short
4
^
The timed harvest cycle is 6 minute.
4 Blinks=Short
3
0.3 $7.6K
F
F)
If the evaporator thermistor is not present or open then the electronic control
ON Solid=OK
2
#
^ ±1%
CONDENSER FAN ON
TEMPERATURE
RESISTANCE
ALL LED'S ON
turn ON)
5.1K
@ 25 $ C (77 $
component.
MAX ICE LED
Entry into Test Mode(All LED'S
# <=37
1% $ F
RESISTANCE
RESISTANCE
52°F±0.3°F
Test #3 - Unit Thermister 2.7k ^
After pressing any button to enter manual diagnostics all LEDs will illuminate
^
TEMPERATURE
@ 25 $ C (77 $ F)
TEMPERATURE
EVAP
After 20 minutes with no key presses, the product turns off.
1
0.3 $7.4k
F
ICE BIN FULL
END HARVEST MODE
for 5 seconds.
button moves down through each step.
To exit manual diagnostics mode, without stepping through all the components,
Step
#
RESISTANCE
Test #2 - Evaporator Thermistor 2.7k ^
Within 5 seconds of all LEDs flashing,
MaxIce
SERVICE AND WIRING
SHEET NO.
TROUBLESHOOTING TESTS
DIAGNOSTICS
The
Time = 3 Min
PART NUMBER
COMPRESSOR
RUN WINDINGS
START WINDINGS
RELAY
OVERLOAD
CIRCULATING PUMP
RESERVOIR DRAIN PUMP
WATER VALVE
SOLENOID COIL (HGV)
BIN THERMISTOR
EVAP THERMISTOR
PC BOARD USER
INTERFACE
PC BOARD MAIN
W10482479
#
#
W10482495
W10520264
W10489122
W10489125
W10217918
W10206473
W10511923
W10492482
PART CAN BE FOUND
ON COMPONENT
W10485960
TRANSFORMER
W10485951
2315558
CONDENSER FAN MOTOR (EXCEPT KUIO MODELS)
& MTG PLATE ASSY
W10200032
(KUIO MODELS ONLY)
WATER FILL SENSOR
W10485962
CUTTER GRID
DOOR SWITCH (REED)
W10485968
W10485964
WATTAGE @ 120V
205
#
#
#
#
7.5W @ 12V AC
4.5W @ 12V AC
15 Nominal
7 - 9
#
#
73
RESISTANCE
#
1-5
3-11
2.7k
@ 25 $ C (77 $ F)
8.7k
@ 0 $ C (32 $ F)
2.7k
@ 25 $ C (77 $ F)
8.7k
@ 0 $ C (32 $ F)
3.5 - 4.5 ohm
cycle is slow to react, then check for a restriction in the gas loop of the
5.1-7.1
Check with service
diagnostics only
the
plate.
sealed system
EMBRACO
SUCTION TUBE
SERVICE AND WIRING
SHEET NO.
W10492485 E W10492485 E
SERVICE AND WIRING
SHEET NO.
PROCESS TUBE
EM SERIES
DISCHARGE TUBE
VAC Secondary Blue to Blue
0.14 - 0.18 ohm 12.8 VAC Secondary Red to Red
tubing and for a functioning hot gas valve.
SERVICE AND WIRING
SHEET NO.
Primary Windings White to Black
0.11 - 0.14 ohm 9.4
The unit may be low on refrigerant.
If the frost pattern is good, then check for a harvest cycle. If the harvest
3.6
3.6
320
385
SERVICE AND WIRING
SHEET NO.
W10492485 E W10492485 E
185
5
NOTE :
WIRE COLOR CODE
1. WATER VALVE AND HOT GAS SOLENOIDS GROUNDED THOUGH MOUNTING.
GROUND WIRE ON "KUIO18NNVS*" OUTDOOR ICE MAKERS ONLY.
3.
NOT POPULATED ON "KUIO18NNVS" OUTDOOR ICE MAKERS.
WIRING
DIAGRAM
Electrical Shock Hazard
Disconnect power before servicing.
Replace all parts and panels before operating.
Failure to do so can result in death or
electrical shock.
115
VOLTS60
HERTZ
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
ORANGE/BLACK TRACER
BLUE/BLACK TRACER
BLACK/YELLOW TRACER
GREEN/YELLOW TRACER
BLACK/WHITE TRACER
RED/WHITE TRACER
LIGHT BLUE/BLACK TRACER
RED/YELLOW TRACER
BLUE/YELLOW TRACER
RED/BLACK TRACER
WHITE/BROWN TRACER
ORANGE/WHITE TRACER
BLACK/RED TRACER
TAN/RED TRACER
YELLOW/BLUE TRACER
BU
BK
RD
WH
YL
OR
BR
GY
V
LB
=
=
=
=
=
=
=
=
=
=
BLUE
BLACK
RED
WHITE
YELLOW
ORANGE
BROWN
GRAY
VIOLET
LIGHT BLUE
3,960,631
4,084,725
4,090,641
4,102,660
4,327,557
4,330,310
4,640,432
4,649,712
4,649,717
4,649,718
4,659,157
4,665,708
4,694,553
4,706,169
4,707,401
4,709,556
4,715,512
4,728,759
4,745,656
4,745,775
4,765,696
4,767,896
4,768,353
4,776,178
4,787,216
4,799,362
4,800,935
4,801,181
4,833,894
4,862,577
4,908,
4,911,
4,914,
4,920,
4,924,
4,934,
4,936,
4,944,
4,958,
4,996,
544
508
928
758
680
541
641
566
890
848
5,011,101
5,033,182
5,033,273
5,042,398
5,044,704
5,050,777
5,070,708
5,077,985
D309,461
6
6
7
P7
P2
GN/YL
6
(DOOR OPEN)
REEDSWITCH
RELAY
COMPRESSOR
S
M
CONTROL BOX
1
1
RD/BK
3
3
BU
1
2
TN/RD
P2
J2
V
WH
WH
1
2
ASSY-THERMISTER,BIN
WH
M
BK/WH
BR
3
2
3
1
1
2
COND FAN MOTOR
RD
BK/WH
WH/RD
WH
WH/RD
6
P7
TN/RD
7
GRID ASSY
RECIRCULATION PUMP
INDUCTOR
5
6
LED 14V DC
MODULE
YL/RD
RUN
4
5
6
WATER FILTER SWITCH
(FILTER INSTALLED)
BK/WH
WH
C
4
5
BK/WH
S
RD
RT
STA
4
1
5
GN/YL
RD
RD
BU
BU
4
OVERLOAD
3
WH
2
1
5
3
2
2
4
5
3
2
WH
3
3
1
2
3
1
4
4
1
RD/BK
RD/BK
3
WH
2
1
3
7
1
2
P5
TN/RD
4
6
1
4
3
BU
TN/RD
2
5
2
2
WH/RD
TN
1
UNIT THERMISTOR
WH
4
3
P1
EVAP THERMISTOR
2
BK
4
P5
P1
TN/RD
2
5
3
4
3
2
BU
6
2
4
3
3
4
WH
WH
WH
BK
4
5
1
2
WH
BU
TN/RD
4
RD
WH
2
7
YL/RD
2
BU
1
4
7
3
RD
6
4
2
1
BIN THERMISTOR
1
3
4
6
3
TRANSFORMER
7
2
3
WH
RD
1
1
2
5
TN
2
BK
1
P8
1
4
WH/RD
DRAIN PUMP
8
P8
3
6
7
8
2
1
P3
7
2
3
RD/BK
BK
6
1
1
2
5
8
BK
BU/YL
8
P3
RD/BK
4
7
WH
RD
2
(FILTER INSTALLED)
WATER FILTER SWITCH
BK
WH
BU/YL
3
6
YL/RD
5
3
7
8
BU
BU
BU
6
7
2
5
RECIRCULATION PUMP
4
1
GY
YL/RD
BU
BU/YL
RD
BU/YL
RD/BK
4
8
2
BU
1
V
9
J2
1
BU
5
4
P4
4
RD
WH
5
2
8
2
WH
GY
3
2
9
7
V
3
BK/WH
BR
6
= GROUND ( CHASSIS )
WH/TN
1
BK/WH
WH
1
1
5
P3
PLUG CONNECTOR
BU/YL
4
2
8
=
2
3
8
7
PERMANENT CONNECTION
2
3
7
6
=
RD/BK
1
5
4
= DISCONNECT TERMINAL
1
1
8
LED 14V DC
MODULE
5
CONNECTOR - CLOSED END
1
3
3
4
P4
1
2
YL/RD
BR
WH/RD
3
6
GY
BK/WH
4
2
WH/TN
1
BU
3
2
2
1
1
2
1
1
1
1
RD
4
YL
BK
3
MODEL 50 CONTROL
MINOTAUR
BU
(DOOR OPEN)
DOOR REED
SWITCH
WATER
LEVEL
SENSOR
BK/WH
BK
3
2
1
P1
TN/BK
1
1
2
1
1
1
BK
2
3
BR
BK
2
3
4
2
BK/WH
OR/BK
3
MODEL 50 CONTROL
MINOTAUR
6
YL/RD
WH
3
2
4
YL
GY
RD/BK
4
BK/WH
BK/WH
1
P1
BK/WH
TN/BK
2
1
2
10
2
1
10
3
TN
WH
WH
WH
WH/RD
RD
3
1
GRID ASSY
OR/BK
4
BK
4
2
SERVICE & WIRING SHEET NO.
W10492485 E
USER
INTERFACE
DOTYK
TRANSFORMER
BK
4
=
GROUND TO
TOP PANEL
WH
USER
INTERFACE
DOTYK
CONNECTOR - SCREW ON
OTHER PATENTS PENDING
DRAIN PUMP MODULE
OPTIONAL ON SOME MODELS
BK
=
GN/YL
2.
OR/BK
BU/BK
BK/YL
GN/YL
BK/WH
RD/WH
LB/BK
RD/YL
BU/YL
RD/BK
WH/BR
OR/WH
BK/RD
TN/RD
YL/BU
SYMBOL CODE
MANUFACTURED UNDER ONE OR MORE
OF THE FOLLOWING UNITED STATES PATEN TS
WIRE COLOR CODE
3.
HOT GAS
SOLENOID
WATER
LEVEL
SENSOR
WH
DRAIN PUMP
WH
ASSY-THERMISTER,ICE CONTROL
WH
WH
V
2.
WH
P2-5
P2-6
MAIN CONTROL
P3-1
P3
P3-3
P3-5
P3-6
P3-8
P4
P5
P7
P8
P4-1
P4-3
P5-1
P5-3
P7-1
P8-1
P8-3
P8-6
UI
P8-7
J1
J1-4
J2
J1-2
J2
J2-1
WH/RD
TN
WH/TN
V
GY
BU
P1-2
P1-2
P1-1
P1-2
WH
120VAC OUTPUT TO HOT GAS VALVE
4 CKT PIN 2 RD/BK 12.8VAC INPUT FROM TRANSFORMER
4 CKT PIN 2 RD/BK 12.8VAC OUTPUT TO RECIRCULATING PUMP
TN/BK
BU
TN/RD
WH
YL
YL/RD
BK/WH
WH
OR/BK
TN/BK
P4-4
P4-4
P5-2
P5-4
P7-2
P8-2
P8-4
P8-4
P8-8
J1-1
J1-1
WH
5VDC INPUT UNIT THERMISTOR
TN/RD 5VDC INPUT EVAP THERMISTOR
GY
5VDC INPUT DOOR REED SWITCH
BR
14VDC OUTPUT WATER LEVEL SENSOR
BR
5VDC INPUT WATER LEVEL SENSOR (WHEN WATER IS PRESENT)
RD
14VDC OUTPUT DIAMOND LED LIGHT
VOLTAGE TEST POINTS DOTYK UI
BK/WH 14VDC INPUT USER INTERFACE
BK/WH COMMUNICATION
VOLTAGE TEST POINTS DIAMOND LED
WH
J2-2
RD
14VDC INPUT DIAMOND LED LIGHT
4CKT PIN3
WH
4CKT PIN4
BK
120VAC INPUT TO TRANSFORMER
3CKT PIN1
BU
3CKT PIN3
BU
9.4VAC OUTPUT FROM TRANSFORMER
4CKT PIN1
RD
4CKT PIN2
VOLTAGE TEST POINTS TRANSFORMER
RD
12.8VAC OUTPUT FROM TRANSFORMER
WH/RD
WH
BLK
INDUCTOR
WH
WH
GN/YL
GN/YL
BK/WH COMMUNICATION
5VDC INPUT BIN THERMISTOR
ASSY-THERMISTER
2.
GN
BK/WH 14VDC OUTPUT USER INTERFACE
BU
S
M
S
C
C
COMP
OVERLOAD
RD
BU/YL 4 CKT PIN 2 RD/BK 12.8VAC OUTPUT TO DRAIN PUMP
OR/BK
GN/YL
120VAC NEUTRAL OUTPUT FOR TRANSFORMER
120VAC OUTPUT TO WATER VALVE
GN/YL
BK
WH
2
3
120VAC OUTPUT TO CONDENSER FAN
120VAC INPUT WATER FILTER SWITCH FEEDBACK
1
WH
WH
WH
1
120VAC OUTPUT TO COMPRESSOR
2
WH
2
3
P1-2
120VAC INPUT - CONSTANT WHEN UNIT PLUGGED IN
M
WH/RD
P2
YL/RD
P1-2
WH
WH
WH
WH
P2-1
RD
P1-2
CONDITIONS
V
P1-4
BK
COLOR
1
P1-1
TO
WH
P1
COLOR
WTR
DISP
SOL
WH
FROM
VOLTAGE TEST POINTS MINOTAUR
COND FAN
RELAY
TN
BLK
WATER VALVE
TN
HOT GAS
VALVE
BK
SERVICE
CORD
GN/YL
WH
DRAIN
PUMP
MODULE
OPTIONAL ON SOME MODELS
BK
GN/YL
WH
WH
3.
BK
Download PDF
Similar pages