Amana Technical Information—Refrigerator Return Technical Sheet


Amana Technical Information—Refrigerator
B136CAL3
B136CAL1
P1318401W
P1318403W
B136CAR3
B136CAR1
P1318402W
P1318404W
•
Due to a possibility of personal injury or property damage, always contact an authorized technician for
servicing or repair of this refrigerator.
•
Refer to Service Manual RS1200001 for design, disassembly, ice maker, safety, testing, and
troubleshooting information.
!
WARNING
To avoid electrical shock which can cause severe personal injury or death, disconnect power to refrigerator using
power switch before servicing. Wires removed during disassembly must be replaced on proper terminals to insure
correct earthing and polarization. After servicing, reconnect power using power switch.
Model
Capacity
Electrical
requirements
separate
circuit
Refrigerant
type
Width
without side
extrusions
Depth
without handle
includes door
extrusions
Height range
rollers to top of
air grille
B136CAL
21 cu ft
115 VAC 60 Hz
15A
B136CAR
21 cu ft
115 VAC 60 Hz
15A
R134a
35″
R134a
35″
237/8″
237/8″
831/4″–841/4″
831/4″–841/4″
Kw/24 hr ± 0.4
Ambient°F
65° 90° 110°
1.2 2.3 4.2
Percent Run
Time ±10%
65°
28
90°
52
110°
100
Cycles/24 hr
±25%
65°
30
90° 110°
32
0
Refrigerator Center
Compartment Food
Average Temperature
±3°F
65°
39
90°
39
110°
45
Freezer
Compartment
Food Average
Temperature ±3°F
65°
3
90°
3
110°
3
Temperature Relationship Test Chart
T-1 Outlet ±3°F
Ambient°F
65°
-14
110°
-14
T-1 Inlet ±3°F
65°
-14
110°
-14
T-3 Suction
Line
±7°F
65°
25
110°
103
Average Total
Wattage ±10%
65°
157
110°
168
Suction Pressure
±2 PSIG
Head Pressure
±5 PSIG
65°
0
65°
110
110°
0
110°
157
Return Technical Sheet to envelope after service
February 1998
1
12074208
Refrigerant Flow
CONDENSER
DRIER
COMPRESSOR
COMPRESSOR
DISCHARGE TUBE
SUCTION
TUBE
(ACCESSIBLE
FROM REAR)
CAPILLARY
TUBE
PRECONDENSER
LOOP (FOAMED
IN PLACE)
EVAPORATOR
CONDENSATE
EVAPORATION
DC FAN
(ELECTRONICALLY
CONTROLLED)
CONDENSATE
PAN
12074208
PRECONDENSER
SERPENTINE
2
February 1998
Cabinet Air Flow
REFRIGERATOR AIR
SUPPLY TUNNEL TO
FRESH FOOD DC FAN
(ELECTRONICALLY
CONTROLLED)
DELI DRAWER
AIR SUPPLY
REFRIGERATOR
RETURN AIR
TUNNEL
EVAPORATOR
FAN ASSEMBLY
REFRIGERATOR
RETURN AIR
TUNNEL
EVAPORATOR
CONDENSATE
EVAPORATION
DC FAN
(ELECTRONICALLY
CONTROLLED)
February 1998
3
12074208
Machine Compartment Air Flow
CONDENSER
CONDENSER
FAN ASSEMBLY
COMPRESSOR
12074208
4
February 1998
Component Specifications
Com ponent
A3079001
Description
Bulb
Test Procedures
Volt
W att
C8931604
Capacitor, com pressor run
Volt
Capacitance
220 VAC
15 Mfd +10%
-5%
12049702
Com pressor
Type
BTUH
Volt
W att
Current
Lock rotor
Full load
Resistance
Run W indings
Start W indings
Fan
970
115
176
B2150504
Drier
115 VAC
40 watts
Cooled, R134a refrigerant
BTUH
VAC 60 Hz
watts
21.3 A
1.6 A
2.60 Ω
4.35 Ω
Drier m ust be changed every tim e the system is opened for testing or
com pressor replacem ent.
Desiccant
(20) 8 x 12 4AXH - 7 M.S. -G ram s
10428411
Heater, evaporator
Volt
W attage
Resistance
115 VAC
450 ± 5% W
30 ± 5% Ω
12401301
Heater, m ullion
Volt
W attage
Resistance
115 VAC
20 W
661 ±7.5 Ω
For service use only.
Foam ed in place. Not powered from
the factory.
!
WARNING
To avoid risk of electrical shock which can cause death or
severe injury, disconnect electric al power to unit before
servicing.
12106801
High voltage circuit board, PC
12067101
Low voltage circuit board, PC
February 1998
To connect m ullion heater to power:
1. Disconnect power to unit using power switch.
2. Rem ove toe grille. Locate water valve wiring harness.
3. Carefully, slit wiring harness vinyl sleeve to expose one black and
one white lead bent with bullet te rm inators.
4. Locate m ullion heater leads at the left side of cabinet and connect to
black and white leads.
5. W rap vinyl sleeve with electrical tape to close slit.
See "Electronic Functional
Description"
See "Electronic Functional
Testing"
5
12074208
Component Specifications
10522103
Motor, condenser PSC
Volt
Rotation (facing end opposite
shaft)
RPM
Watt
Current
Resistance
115 VAC, 60 Hz
Clockwise
1300 RPM
6.4 W
0.05 A
480 Ω
10654207
Motor, ECM evaporator fan
Volt
Rotation (facing shaft)
RPM
Watt
115 VAC, 60 Hz
Counterclockwise
2150 RPM
2.2 W
12075003
Motor and blade, refrigerator fan and
condensate evaporation fan
Volt
Rotation (facing shaft)
RPM
Watt
24 VDC
Counterclockwise
3300 RPM
1.4 watts
10377015
Overload
Volt
Ult. trip amps @ 158°F (70°C)
Close temperature
Open temperature
Short time trip (seconds)
Short time trip (amps @ 77°F
(25°C))
115 VAC
3.51 A
142°F (61°C) ±9°
257°F (125°C) ±5°
10 seconds
14 A
10097202
Relay
Resistance
With power off check:
Across terminals 2 & 3
Shorted
Open
12235201
3–12 Ω
0Ω
Very high or infinite ohms
Switch, Keyboard
PIN NO.
S w it c h F u n c t io n s
D is p la y O n
F r e e z e r T e m p e r a tu r e
R e f r ig e r a to r T e m p e r a t u r e
W a rm e r
C o ld e r
*
M ax C ool
F a s t F re e ze
A la r m O f f
D is p la y O f f
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
1
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
3
6
7
4
8
5
PERIMETER
STATIC GUARD
C3680306
Switch, auger interlock
Type
Volt
Current
DPST, NO
250/125 VAC
10/5 A
12074904
Switch, refrigerator light (left opening
door hinge)
Type
Volt
Current
SPST, NC
125/250 VAC
3A
12074208
6
February 1998
Component Specifications
1 20 74 90 6
S w itch , re frig e ra to r lig h t (rig h t o pening T ype
d o o r h in g e )
V olt
C urrent
SPST, NC
125/250 V A C
3 am ps
1 20 74 80 1
S w itch , p o we r
T ype
V olt
C urrent
DPST
125 V A C
15 A
1 24 01 40 2
S w itch , fre e ze r lig h t, se a le d
T ype
V olt
C urrent
SPST, NC
125/250 V A C
5.0/5/0 A
1 05 44 50 2
S w itch , sh o wro o m
T ype
V olt
C urrent
SPDT
125 V A C
6 am ps
C 8 98 37 01
T h e rm isto r
C heck resistance across
term inals
B ell C urve resistance (S ee
P age 11)
@ 7 7 °F
@ 4 5 °F
V olt
W a tt
C urrent
R esistance across term inals
A bove 55° ±6°F
B elow 20° ±8°F
B etween 55° ±6°F and
20° ±8°F
1 04 42 40 7
1 20 70 80 1
T h e rm o sta t
V a lve , w a te r
V olt
W a tt
W ater pressure (inlet)
M ax
M in
F ill ra te
30,000 ohm s ±1% ohm s
68,200 ohm s ±2% ohm s
120 V A C
1000 watts
10 am ps
O pen
C losed
W ill stay in current state (e ith e r o p e n o r
closed) until either 55° ±6 °F a n d 2 0 °
±8°F is reached.
120 V A C , 60 H z
20 watts
120 P S I
20 P S I
140 ±10 C C 's at 7.5 seco n d s
Additional Part Numbers
12196401
12234601
B5742603
12059901
12061902
12056901
12144601
12073101
12073201
12073301
12039601
12039701
12097401
14036505
12179801
10933002
February 1998
Basket, bottom feezer
Basket, top freezer
Blade, condenser fan
Blade, evaporator fan
Condenser assembly
Crisper pan assembly
Crisper, pan
Deli drawer lid
Deli drawer top
Deli drawer
Door shelf assembly (refrigerator)
Door shelf assembly (refrigerator)
Dairy modeule assembly
Egg tray
Evaporator
Gasket, freezer door
10933001
D7813004
12193401
R0167203
R0156669
12201601
12021401
12021301
12104901
12296301
12096901
R0161060
10423129
14036404
7
Gasket, refrigerator door
Harness, ice maker
Ice pan
Module & motor assembly, ice maker
Mold & heater assembly, ice maker
Overlay, keyboard
Shelf, crisper
Shelf, refrigerator
Shelf snugger
Shut off arm, ice maker
Socket, light
Thermostat, ice maker (order
R0195019 cement alumilastic also).
Utility bin
Utility bin lid
12074208
Display Panel
FRZ
TEMP
REF
TEMP
HIGH
TEMP
MAX
FRZ
DOOR
OPEN
COLDEST
MAX
REF
Temperature
Display Lights
FRZ
TEMP
REF
TEMP
COLDEST
HIGH
TEMP
DOOR
OPEN
MAX
FRZ
MAX
REF
Display
On
Display
On
Freezer
Temp
Ref
Temp
Warmer
Freezer
Temp
Ref
Temp
Colder
Warme
*
Colder
*
Max
Ref
Max
Ref
Max
Frz
Max
Frz
Alarm
Off
Display
Off
Alarm
Off
Display
Off
Display Panel
Keyboard
12074208
8
February 1998
Display Panel Operation
Max Ref Pad
Activates Maximum refrigerator mode setting
refrigerator to coldest setting for 24 hours or until
Max Ref pad is pressed again.
Keyboard Pad Functions
Entry Tone
Indicates a pad was pressed, command read and
accepted. Turn off entry tone by pressing and holding
Display On pad for 3 to 5 seconds.
1. Refrigerator indicator light will glow.
Command Accepted Tone
Three short tones indicate command accepted.
2. To adjust maximum refrigerator time refer to Mode
B functions.
Display On Pad
1. Activates control panel. Control panel remains
active at least 10 minutes.
Alarm Off Pad
Turns off alarm signals. See Alarms section to interpret
alarm signals.
2. Turns off Power Up Alarm (flashing lights) after
power is first plugged in or after power outage.
1. Press and hold Alarm Off pad for 3 seconds to
deactivate Door Open alarm. To reactivate Door
Open alarm, press and hold Alarm Off pad for 3
seconds.
Note: All pads, except Alarm Off , are inactive until
Display On is pressed.
Freezer Temp Pad
Activates freezer temperature setting mode.
1. Freezer indicator light will glow. Freezer
temperature setting will be displayed. Factory
setting is 5 .
2. Change freezer temperature setting by pressing
Warmer or Colder pad.
2. If Alarm Off pad is pressed and condition causing
alarm is not corrected, alarm will reset.
Ref Temp Pad
Activates refrigerator temperature setting mode.
2. Press Display On pad.
1. Refrigerator indicator light will glow. Refrigerator
temperature setting will be displayed. Factory
setting is 5 .
4. Within 6 seconds press the following pads in this
sequence: Max Ref, Max Frz, Max Ref, Max Frz.
*Activates Program Mode. See Program Mode section
for description of functions available.
1. Open refrigerator door.
3. Press
* pad.
5. Tone will sound 3 times and control will be in
program mode A.
2. Change refrigerator temperature setting by pressing
Warmer or Colder pad.
Display Off Pad
1. Deactivates control panel.
Warmer Pad
Raises temperature setting one bar at a time. If entry
tone is on, tone will sound at each bar level until top
level is reached.
1. Turn on temperature setting function of control
panel by pressing Warmer pad.
2. Deactivates temperature indication area of control.
panel.
2. Press and hold Warmer pad to raise temperature
setting at a faster rate.
Colder Pad
Lowers temperature setting one bar at a time. If entry
tone is on, tone will sound at each bar level until bottom
level is reached.
1. Turn on temperature setting function of control
panel by pressing Colder pad.
2. Press and hold Colder pad to lower temperature
setting at a faster rate.
Max Frz Pad
Activates Maximum freezer mode setting freezer
temperature to coldest setting for 24 hours or until
Max Frz pad is pressed again.
1. Freezer indicator light will glow.
2. To adjust maximum freezer mode time refer to
Program Mode B functions.
February 1998
9
12074208
Electronic Functional Description
Thermistor Alarm
Alarm sounds and freezer or refrigerator indicator light
shows and temperature indicators 4 through 7 will turn
on in sequence if either thermistor circuit opens. Refer
to Temperature Control Operation Section and
Electronic Testing Section.
Power Disconnect Switch
Use power disconnect switch to disconnect power
without unplugging refrigerator. Power disconnect
switch is located behind air grille on top right side.
Refrigerator is shipped with power disconnect switch in
the on position.
Showroom Switch
1. Press Alarm Off pad to turn off alarm.
Showroom switch allows electronic controls and
interior lights to function independently of refrigeration
system. Showroom switch is located behind air grille to
right of control panel. Refrigerator is shipped with
showroom switch in unit run position.
2. Alarm will retest for normal operation. If condition
has not been corrected, alarm will sound again.
Showroom
switch
Power
switch
m
a
rA
sl
Alarms
Power Up Alarm
After power is initially plugged in, after a power loss, or
if power switch is turned off, all temperature indicator
lights will flash until Alarm Off or Display On is
pressed.
Note: All settings return to default factory settings.
Door Open Alarm
Alarm tone sounds and indicator lights blink if either
refrigerator or freezer door is open more than 3 minutes.
1. Turn off Door Open alarm by pressing Alarm Off
pad or by closing door.
2. Deactivate door open alarm by pressing Display
On pad and then press and hold Alarm Off pad for
3 seconds.
3. Door alarm delay can be adjusted in Program
Mode B.
High Temperature Alarm
Alarm sounds and indicator light shows if freezer or
refrigerator temperature has gone above critical level
and remained warm for 2 hours. Alarm tone stops if
temperature falls again.
1. Critical temperature for freezer is +15°F; for
refrigerator critical temperature is +55°F.
2. Press Alarm Off pad to turn off alarm.
12074208
10
February 1998
Electronic Functional Description
Temperature Control Operation
Factory set freezer and refrigerator settings
Part # 120671001
For any temperature setting, outputs will be turned
off/on based on cut-in/cut-out temperatures determined
by resistance levels of freezer and refrigerator
thermistors.
Refrigerator and Freezer Thermistor
Part # C8983701
Temp
°F (°C)
Resistance Temp
Resistance
Ohms
°F (°C) Ohms
-20 (-29) 495600
36 (2)
87510
-15 (-26) 418200
38 (3)
82740
Frozen
Food
Fresh
Food
Cut-out
F° (C°) ±
1.5°
Cut-out
F° (C°) ±
1.5°
-10 (-23)
29 (-2)
9
-8 (-22)
31 (-0.6)
8
-6 (-21)
33 (-0.6)
7
-5 (-21)
34 (1)
6
-4 (-20)
35 (2)
5
Level
-9 (-23)
354000
39 (4)
78300
-6 (-21)
300600
43 (6)
74100
-3 (-19)
36 (2)
4
-4 (-18)
256200
45 (7)
70170
-2 (-19)
37 (3)
3
5 (-15)
218850
46 (8)
66450
0 (-18)
39 (4)
2
10 (-12)
187470
48 (9)
62970
2 (-17)
41 (5)
1
16 (-9)
161040
50 (10) 59670
-10 (-23)
----
Max Ref
----
29 (-2)
Max Frz
19 (-7)
138690
55 (13) 52290
25 (-4)
119760
61 (16) 45900
30 (-1)
103680
64 (18) 40410
32 (0)
97920
70 (21) 36540
34 (1)
92550
77 (25) 30000
As temperature decreases, resistance increases.
As temperature increases, resistance decreases.
Open thermistor or thermistor circuit will result in
failure of refrigerator to cool.
Shorted thermistor will cause refrigerator to run 100
percent of time except for defrost cycle.
•
Freezer temperature setting and thermistor value
will determine if compressor/condenser fan and
evaporator fan switches are open or closed.
Compressor/condenser fan switch must be open for
6 minutes before switch can close again
(compressor dwell time).
•
Refrigerator temperature setting and thermistor
value will determine if fresh food fan switch is open
or closed.
•
Cut-out and cut-in temperature values must be
reached and maintained for 15 seconds before
output state will change (digital delay).
•
Refrigerator and freezer control calibration can be
adjusted in Program Mode B.
February 1998
11
12074208
Electronic Functional Description
Adaptive Defrost Operation
Defrost occurs after predetermined length of
compressor run hours. Compressor run time between
defrosts changes, or adapts, depending upon recent
history of defrost lengths (time it takes for defrost
terminator to open after defrost heater has been turned
on).
• Defrost terminator opens at 55°F (13°C) and closes
at 20°F (-7°C).
•
Compressor run time between defrost (CRTD) will
be one of 3 values under normal operation: CRTD 1
(8 hours) or CRTD 2 (12 hours) or CRTD 3 (16
hours).
If defrost length is low (DT-LO defined as 21
minutes) indicating small frost load, CRTD for next
defrost cycle is advanced to next level.
If defrost length is high (DI - HI defined as 24
minutes) indicating large frost load, CRTD for next
defrost cycle is lowered to next level.
If defrost length is between 21 and 24 minutes,
CRTD for next defrost cycle remains the same.
Initial value at power up CRTD 0 is 4 hours.
•
Vacation Mode CRTD equals 96 hours. Vacation
Mode CRTD is interrupted with door openings.
Defrost interval will revert back to interval before
Vacation Mode. Three things must occur to reach
Vacation Mode CRTD:
1) Defrost interval must be CRTD 3 (16 hours).
2) Both refrigerator and freezer doors must have
remained closed since last defrost cycle.
3) Defrost thermostat must have opened in less
than 21 minutes during last defrost cycle.
•
Six minute dwell time occurs after defrost
terminator opens before compressor and condenser
fan motor will operate. Ten minute dwell time
occurs after defrost terminator opens before
evaporator fan motor will operate. Dwell time can be
bypassed by disconnecting power to the unit for 30
seconds.
•
Conventional defrost can be selected in Program
Mode B.
12074208
12
February 1998
Program Mode
Accessing Program Mode
Mode B Functions
Two programming modes are available. Mode A allows
reading refrigerator and freezer thermistor
temperatures. Mode B is used for all other
programmable functions.
Automatic Keyboard Function
Activate and deactivate keyboard by toggling
Display Off pad. If high temperature indicator glows,
keyboard will disable after 10 minutes. If high
temperature indicator is off, keyboard is always
enabled. DO NOT LEAVE KEYBOARD IN ENABLED
MODE AFTER PROGRAMMING IS COMPLETE.
1.
2.
3.
4.
Open refrigerator door.
Press Display On pad.
Press * pad.
Press the following sequence of pads within 6
seconds: Max Ref, Max Frz, Max Ref, Max Frz.
5. When access is granted, tone will sound three time
and control will be in Program Mode A. Unmarked
indicator light will illuminate.
6. Toggle to Program Mode B by pressing Display On
pad. Unmarked indicator light is off.
Door Alarm Delay
1. Press Alarm Off pad. Door open indicator will glow.
One temperature indicator should glow indicating
present delay setting in minutes (indicator 1 means
1 minute, 2 means 2 minutes, etc.) Default delay is
3 minutes.
EEPROM Update in Control Memory
2. Press Warmer pad to decrease delay by 1 minute.
EEPROM is permanent programmable memory of the
control panel.
• Entry tone, door audio alarm and status are stored
in EEPROM after control panel is deactivated.
3. Press Colder pad to increase delay by 1 minute.
•
Max Ref Run Time Duration
1. Press Max Ref pad. Max Ref light will glow. One
temperature indicator should glow indicating
present Max Ref run time duration in 2 hour
increments (indicator 1 means 2 hours, 2 means 4
hours, etc.) Default delay is 10 hours.
Information stored in EEPROM memory is not
affected by power loss.
Mode A Functions
Reading Temperature Display
Temperature display will show thermistor temperature
in binary coded decimal format (BCD). Indicator lights 1
through 4 represent the tens digit with 1 being the most
significant bit. Indicator lights 5 through 8 represent
ones digit with 5 being the most significant bit. Positive
and negative are shown by indicator light 9; light glows
to show negative value
.
Add together all lit indicators
Indicator
1
2
3
4
Coldest
3. Press Colder pad to increase Max Ref duration by 2
hours.
Max Frz Run Time Duration
1. Press Max Frz pad. Max Frz light will glow. One
temperature indicator should glow indicating
present Max Frz run time duration in 4 hour
increments (indicator 1 means 4 hours, 2 means 8
hours, etc.) Default delay is 24 hours.
1 through 4 according to their
values to obtain ten's column
digit. Example if 3 and 4 are lit
the tens column total 3 (2 + 1
= 3)
Value
when
Value
8
4
2
1
5
6
7
8
2. Press Warmer pad to decrease Max Ref duration by
2 hours.
2. Press Warmer pad to decrease Max Frz duration by
4 hours.
3. Press Colder pad to increase Max Frz duration by 4
hours.
Add together all lit indicators 5
through 8 according to their
values to get one's column
digit. Example if 6 and 7 are lit
the one column total 6 (4 + 2
= 6). The ex ample temperature
is 36º F. w ith coldest indicator
not lit.
8
4
2
1
+/-
3
6
Degrees F.
Freezer Thermistor Temperature
1. Choose freezer thermistor temperature display by
pressing Freezer Temp pad.
2. Freezer thermistor temperature displays.
Refrigerator Thermistor Temperature
1. Choose Refrigerator thermistor temperature display
by pressing Ref Temp pad.
2. Refrigerator thermistor temperature displays.
February 1998
13
12074208
Program Mode
Temperature Offset Calibration
Offset amount adjusts temperatures for refrigerator cutins and cut-outs by the amount of offset. The chart
below shows the indicator and the amount of offset from
the factory default setting.
•
INDICATOR
OFFSET
1
+8
2
+6
3
+4
4
+2
5
0
6
-2
7
-4
8
-6
Coldest
-8
Exiting Program Mode
Press Display On pad for 3 seconds to exit Program
Mode. Tone will sound three times. Changes made in
Program Mode will be permanently saved in EEPROM.
Note: If no pad is pressed for 10 minutes, Program
Mode will be automatically exited. However, no
changes will be saved if Program Mode exits
automatically.
Setting Refrigerator Temperature Offset
Press Ref Temp pad. Refrigerator indicator and one
indicator will glow. Press Warmer pad to move
offset to the next warmer setting. Press Colder pad
to move offset to the next colder setting. Factory
default refrigerator offset is +2.
•
Setting Freezer Temperature Offset
Press Freezer Temp pad. Freezer temperature
indicator and one indicator will glow. Press Warmer
pad to move offset to the next warmer setting.
Press Colder pad to move offset to the next colder
setting. Factory default freezer offset is 0.
Defrost Mode Selection
Toggle * pad to select adaptive or conventional defrost
mode. Vacation indicator glows when adaptive defrost
has been selected. If vacation indicator is off,
conventional defrost is selected. Conventional defrost
uses 8 hour CRTD value.
Forced Defrost
Defrost can be forced to start by pressing and holding
the Alarm Off pad for 3 seconds. Program changes will
be saved permanently in EEPROM and program mode
will exit to Run Mode.
Forced Pulldown (Compressor Start)
Compressor start can be forced by pressing and
holding Max Frz pad for 3 seconds. Program changes
will be saved permanently in EEPROM. Compressor,
evaporator fan, damper heater, and condenser fan will
come on.
12074208
14
February 1998
Electronic Testing
3. If terminal 7 on high voltage board changes with
opening and closing of door, orange wire in low
voltage harness is broken (check for continuity
between pin 7 on high voltage board and pin 10 on
low voltage board) or low voltage board needs
replacing.
Electronic Testing Mode
Forced Defrost Start
1. Press Display On pad to activate control panel.
2. Simultaneously press and hold Max Ref and
Display Off pads for 3 seconds.
Forced Compressor Start
1. Press Display On pad to activate control panel.
DANGER
2. Simultaneously press and hold Max Frz pad and
Display Off pad for 3 seconds.
High Voltage
Open Thermistor Detect
1. Check for line voltage on terminal E8 on high
voltage board. With freezer door open, reading
should be 115 VAC. With door closed, reading
should be approximately 0 VAC. If voltage does not
change with light switch and light switch is turning
light off and on, violet/white wire is broken between
switch and high voltage board.
Alarm sounds and freezer or refrigerator indicator light
shows and temperature indicators 4 through 7 will turn
on in sequence if either thermistor circuit opens. Refer
to Temperature Control Operation Section and
Electronic Testing Section.
1. Press Alarm Off pad to turn off alarm.
2. Check for voltage on pin 7 on pin connector of high
voltage board. Output voltage should toggle with
toggling of light switch. If it does not toggle, high
voltage board needs replacing.
2. Alarm will retest for normal operation. If condition
has not been corrected, alarm will sound again.
Evaporator Fan Suppression
The evaporator fan will turn off every time either
refrigerator or freezer door is open.
To test if this function is operating:
3. If voltage on pin 7 on pin connector on high voltage
board changes with opening and closing of door,
orange wire in low voltage harness is broken (check
for continuity between pin 7 on high voltage pin
connector and pin 10 on low voltage board) or low
voltage board needs replacing.
1. Perform forced pull down procedure as noted above
–evaporator fan should be on.
2. Open the refrigerator or freezer door–the fan should
turn off.
3. Push the light switch off–the evaporator fan should
start.
If fan does not toggle off and on when refrigerator light
switch is turned off and on and it has been determined
evaporator fan motor is operational, perform following
tests to determine failure:
DANGER
High Voltage
1. Check for line voltage on terminal E7 on high
voltage board. With refrigerator door open
(refrigerator light ON) reading should be 115 VAC.
With refrigerator door closed (refrigerator light OFF)
reading should be approximately 0 VAC.
If voltage does not change with light switch and
light switch is turning light off and on, red/white wire
is broken between switch and high voltage board.
2. Check for voltage on terminal E7 on high voltage
board. Output voltage should toggle with toggling of
light switch. If output voltage does not toggle, high
voltage board needs replacing.
February 1998
15
12074208
Electronic Functional Description
WARNING
To avoid electrical shock which can cause severe personal injury or death, disconnect power to refrigerator
using power switch before servicing. Wires removed during disassembly must be replaced on proper
terminals to insure correct earthing and polarization. After servicing, reconnect power using power switch.
Ground
Line Voltage (L1)
Transformer
Neutral (L2)
Freezer Door Open
100-298-03
REF-AMP-03
SN. 2307
10627301
9309
Refrigerator Door
Open
Defrost Heater
Defrost Heater Relay
Capacitor
Defrost Terminator
Comp./Cond. Fan
E3
Power Switch
Comp./Cond. Fan Relay
K1
Evaporator Fan
Evaporator Fan Relay
DC Fans
12 Pin Connector
12074208
16
February 1998
Electronic Functional Description
WARNING
To avoid electrical shock which can cause severe personal injury or death, disconnect power to refrigerator
using power switch before servicing. Wires removed during disassembly must be replaced on proper
terminals to insure correct earthing and polarization. After servicing, reconnect power using power switch.
Refrigeration and Defrost Component Checks Made at High Voltage Board
Low voltage board input
W1 to D11
approximately
-25 VDC
High voltage board input
E10 to E9 (Neutral) or ground
approximately
120 VAC
Compressor/condenser fan motor
“ON” = E4 to E9 (Neutral) ground
“OFF” = E4 to E9 (Neutral) or ground
approximately
120 VAC
Compressor/condenser fan motor
relay
“CLOSED” = R7 to ground
“OPEN” = R7 to ground
approximately
approximately
-11 VDC
-25 VDC
Evaporator fan motor relay
“CLOSED” = R8 to ground
“OPEN” = R8 to ground
approximately
-11 VDC
-25 VDC
Evaporator fan motor
“ON” = E2 to E9 (Neutral) or ground
“OFF” = E2 to E9 (Neutral) or ground
approximately
120 VAC
0 VAC
Defrost heater
“ON” = E6 to E9 (Neutral) or ground
“OFF” = E6 to E9 (Neutral) or ground
approximately
120 VAC
0 VAC
Defrost heater relay
“CLOSED” = R9 to ground
“OPEN” = R9 to ground
approximately
approximately
-11 VDC
-25 VDC
Defrost terminator
“CLOSED” = E5 to E9 (Neutral) or ground
“OPEN” = E5 to E9 (Neutral) or ground
approximately
120 VAC
0 VAC
DC fan output voltage from
high voltage board to fresh food fan
or condensate evaporation fan
“ON” = E1 to ground
“OFF” = E1 to ground
approximately
-25 VDC
0 VDC
DC fan input voltage
Signal to high voltage board from
low voltage board for
fresh food fan and for consendate
evaporation fan
“ON” = R10 to ground
“OFF” = R10 to ground
approximately
approximately
-11 VDC
-25 VDC
Filament voltage at pins 11 and 12 = less than 5 VAC
February 1998
17
12074208
Wiring Schematic
WARNING
To avoid electrical shock which can cause severe personal injury or death, disconnect power to refrigerator
using power switch before servicing. Wires removed during disassembly must be replaced on proper
terminals to insure correct earthing and polarization. After servicing, reconnect power using power switch.
DANGER
High Voltage
12405801
12074208
18
PRINTED IN U.S.A.
February 1998
Wiring Diagram
WARNING
To avoid electrical shock which can cause severe personal injury or death, disconnect power to refrigerator
using power switch before servicing. Wires removed during disassembly must be replaced on proper
terminals to insure correct earthing and polarization. After servicing, reconnect power using power switch.
12045901 PRINTED IN U.S.A.
February 1998
19
12074208
Ice Maker
Specifications
Mold heater:
Thermostat:
(bimetal)
Water fill:
Motor cycle:
185 watts, 264 ohms
Close 17 ± 3°F (-8 ± 1°C)
Opens 32° ± 3°F (0°± 1°C)
140 cc, 7.5 sec.
Stamped in circuit.
Plug in connectors.
One revolution of blades takes
3 minutes plug stall time on ice
(eject and water fill).
Testing Procedures
Verify ice maker has power, shut-off arm is down, and
freezer is cold enough to close bimetal thermostat.
•
Test point L and N will verify 120 volts to ice maker
module.
•
Test points T and H will verify bimetal thermostat is
open or closed.
•
Verify test probes go into test points 1/2 inch
(1.25 cm).
1. Short T and H with a shunt (insulated 14 gauge wire
with ends stripped back 5/8 inch (1.6 cm)) to run
motor. If motor runs, replace bimetal thermostat. If
motor does not run, replace module.
Operation
Thermostat closes when temperature reaches
17° ± 3°F (-8.3° ± 1.5°C). Current flows through
thermostat to motor. See “Ice Maker Wiring Diagram”.
Motor is linked with drive gear. From module, there are
copper contacts that ride on copper strips on backside
of drive gear. As the drive gear rotates, contacts will
make or break a circuit (tract) to the copper strips to
operate ice maker.
All components can be tested without removing ice
maker or moving refrigerator away from installation.
Remove cover.
Test points are identified on module:
N = Neutral side of line
M = Motor connection
H = Heater Connection
T = Thermostat connection
2. Leave jumper in for half of revolution. Touch heater
mold. If heater mold feels warm, heater is working
properly.
3. Remove jumper. Water valve will be energized in
last half of revolution if mold heater has not failed.
L = L1 side of line
V = Water valve connection
N
!
M
Caution
To avoid ice maker damage do not short any
contacts together other than those specified.
V
L
T
12074208
H
20
February 1998
Ice Maker
Module Ohmmeter Checks
No Power to Ice Maker and
Ejector Blades in End of Cycle Position
Test Points
Component
Module Position
L-H
Mold and heater
Attached to support
Ohms
264
L-M
Motor
Separated from heater
16,100
Module Voltage Checks with Meter or Test Light
Power to Ice Maker
Test Points
Component
Line Voltage
0 Volts
L-N
Module
Power on
Power off
T-H
Bimetal
Open
Closed
L-H
Heater
On
Off
L-M
Motor
On
Off
N-V
Water valve
On
Off
Disassembly Procedures
Cover
1. Pull water adjustment knob forward.
Module, Motor, and Support Assembly
1. Loosen both screws in module access ports.
2. Snap off cover.
2. Disconnect shut-off arm.
!
WARNING
3. Pull mold from support assembly.
To avoid electrical shock which can cause severe
personal injury or death, disconnect power to
refrigerator using power switch before servicing.
Wires removed during disassembly must be
replaced on proper terminals to insure correct
earthing and polarization. After servicing,
reconnect power using power switch.
Remove module only by removing 3 screws and pulling
module out of housing.
Shut-Off Arm
1. Pull shut-off arm out from white bushing.
2. Replace by pushing completely in.
3. Follow steps below.
Shut off arm
Adjustment
screw
Module and Heater Assembly
1. Remove module and support assembly.
Mold attachment screw
access ports
2. Install module and support assembly on
replacement mold and heater assembly.
Fill Cup
1. Remove module and support assembly.
2. Remove ejector blades and shut-off arm.
3. Pull fill cup from mold.
February 1998
21
12074208
Ice Maker
Ejector Blades or Stripper
1. Remove module and support assembly.
2. Install ejector blades, realigning "D" coupling with
module cam.
Accessing Control Box
1. Remove motor and contact assembly from control
box by removing 3 screws.
2. Remove shut-off arm.
3. Pull free.
N
Water valve
energized
7.5 seconds
140 cc fill
11:00 position
M
Ejector blade
stop position
1:30 position
Start position:
thermostat closes,
motor on,
heater on
V
L
T
H
Thermostat
opens in this
range and
heater is off
Mold and heater screw access ports
!
6:00 position
Ejector stall on ice,
motor on
(30 seconds to 5 minutes)
4:00 position
Caution
Water Fill Adjustment
To avoid main assembly damage do not rotate
blades or drive gear.
Turning water level adjustment screw will move contact
in relationship with contact ring segment. This causes
contact to vary time water valve is energized. Contact
ring is tapered at end of fill time.
Switches will jam if turned counterclockwise and gears
will be destroyed if turned clockwise. Advance ice
maker into cycle by using a jumper to bridge H to R. Ice
maker will not run if motor is defective. Shut-off arm
must be in on position.
There are several slotted shafts on motor assembly
board. Do not insert screwdriver and attempt to turn
shafts. Slots permit assembly only.
There are nonrepairable and nonreplaceable
components in module. When diagnosing or repairing
ice maker, do not remove module unless replacing
module.
• Turning screw clockwise decreases fill time.
• Turning screw counterclockwise increases fill time.
• 1/2 turn equals 20 cc or 1.2 seconds.
• Full turn equals 40 cc or 2.4 seconds.
12074208
22
February 1998
Ice Maker
!
achieve mode temperatures easily.
Thermostat, mold heater, and wiring harness are
replaceable. Any other failure, including motor, requires
replacement of module assembly. Replacement mold
assembly comes with new mold heater installed.
Caution
To avoid module damage do not rotate water
adjustment screw more than one full turn in
either direction.
Thermostat
1. Remove control box from mold by removing
screws.
If water valve adjustment screw falls out, put screw in
hole and align as shown below.
Screws
Water
adjustment
screw
N
M
2. Pull front of black housing free of mold. Thermostat
is on mold side.
V
L
T
Thermostat
H
When small hole is centered in large hole, water fill
adjustment is 7.5 seconds (normal fill time).
Water Problems
Retaining clips
Poor water quality can cause ice maker to fail or
produce unacceptable cubes. Mineral content or sand
can restrict screen in water fill valve or particle of sand
can keep valve from seating properly.
If water valve does not close, the following could occur:
• no ice production
3. Grasp 1 thermostat clip and pull out.
4. Press in new thermostat. Verify pins are properly
indexed. Electrical assembly does not need to be
removed.
If replacing module, transfer clips to new mold
support. Use new thermal bonding material.
• small or hollow ice cubes
• flooding of ice container
Install water filter, part #R0183114, to eliminate bad
taste, odor, and visible contaminates.
Mineral contact can cause lime build up in mold.
Wicking of water over mold and poor cube release can
occur. Silicone is applied at upper edges around fill cup
and stripper.
Wiring Harness
Remove wiring harness by pressing retaining tab
and pulling forward.
Temperature Problems
Freezer temperatures above normal 0° ± 2°F
(-18°±1°C) will slow down ice production. Increase ice
production by setting freezer to colder setting.
Thermostat cycling temperature (1 revolution ice
maker) is 17° ± 3°F (-8° ± 1°C). Ice will freeze when
these temperatures are achieved. Cycling time will be
slower if freezer temperature is not cold enough to
February 1998
Press
tab
23
12074208
Ice Maker
!
Caution
To avoid property damage, test for water leaks
after repair or replacement of water valve. Do
not overtighten connection to household water
supply.
Water Valve
Water valve has 1 solenoid. Valve has 80 mesh screen
water strainer. When tan encapsulated solenoid is
energized, the amount of water entering ice maker
mold is directly proportional to length of time water
valve switch is held closed by timing cam.
Inside valve is a flow washer which acts as a water
pressure regulator. Proper ice maker fill is 140 cc
±10cc at 7.5 seconds of water fill at an inlet pressure
ranging from 20 to 120 PSI (1.4 to 8.2 bar).
Wiring Harness
A nonresettable thermal fuse micro device 170°F
(78°C) is spliced into red wire of ice maker wiring
harness. Excessive heat can cause no ice production.
Replacing wiring harness will only temporarily solve
problem. Replace ice maker thermostats.
12074208
24
February 1998
Ice Maker Troubleshooting Chart
No or Low Ice Production
Problem
Action
Warm freezer
Adjust freezer control or repair refrigerator
Broken locking tab on vertical cam
Replace module
Shorted and burned module shut-off
switch and contacts
Replace module
Stalled or stripped motor
Replace module
2:30 Ejector Position
February 1998
Contaminated module.
Motor won't run when “T” and “H” test
points are shorted.
Replace module
Open or missing thermostat
Replace or install thermostat
Apply alumilastic
No power to ice maker (harness)
Determine discontinuity by tracing power
Jammed cubes
Notice size and density of cubes
Un-jam cubes
Check fill tube and fill-cup assembly
Frozen fill tube
Replace water valve
Kinked water line
Un-kink line and check line for weak sections
Obstructed water line to ice maker or
refrigerator
Clear water line
Clogged water valve
Replace water valve
No power to water valve
Determine discontinuity by tracing power
Low water pressure
Short “T” & “H” test points for 10 seconds.
Remove jumpers. Catch water in glass.
Increase water pressure to 20 -120 psi (1.4 - 8.2 bar)
140 cc's.
Open heater circuit
Replace mold and heater assembly
Closed thermostat
Replace thermostat
Damaged heater tulips on module
Replace module
Short heater pins that do not
contact module
Replace mold and heater assembly
Raised shut-off arm
Lower shut-off arm to begin cycle
Water or ice in actuator/housing hole
Remove module
Dry actuator and housing hole
Small or burred housing hole
Repair or replace ice maker
Large or burred actuator O.D.
Replace module
Damaged module housing
Replace module
Deformed shut-off arm
Replace shut-off arm
Little or no alumilastic on thermostat
Apply alumilastic to thermostat
Housing to mold screws not seated
Tighten 2 screws (20-26 in.lb) (22.8 - 29.6 cm.kg)
Heater not staked in mold
Replace mold and heater assembly
Apply alumilastic
Incorrect heater temperature
Replace mold and heater assembly
Apply alumilastic
Broken shut-off lever or
mislocated shut-off switch
Replace module
25
12074208
Ice Maker Troubleshooting Chart
3:00 Ejector Position
Contaminated
Replace module
Jammed cubes
Notice size and density of cubes
Un-jam cubes
Refrigerator or ice maker not level
Level refrigerator or ice maker
No power to ice maker
Determine discontinuity by tracing power
Excessive water-fill volume
Adjust module screw, lower water pressure, or
replace water valve
Cubes falling back into mold during
ejection
Replace fill cup
Check fill tube assemby
4:00 Ejector Position
Contaminated
Replace mold and heater assembly
Apply alumilastic
Thermostat out of calibration
Replace thermostat
Apply alumilastic
Open heater circuit
Motor should oscillate
Replace mold and heater assembly
Apply alumilastic
Little or no alumilastic on thermostat
Apply alumilastic to thermostat
Heater not staked in mold
Replace mold and heater assembly
Apply alumilastic
Broken locking tabs on vertical cam
Replace module
6:00 Ejector Position
Contaminated
Replace mold and heater assembly
Apply alumilastic
Insufficient water to ice maker,
small or hollow cubes
Refer to “Hollow Ice Cubes”
7:30 Ejector Position
Contaminated
Motor will not oscillate
Replace module
Shut-off arm stuck in ice or
obstructed
Remove obstruction
Replace module
Cubes not formed properly
Un-Jam
Check fill cup and fill tube assembly
9:00 Ejector Position
12074208
Contaminated
Replace module
Cube frozen to fill cup or mold
Un-jam
Replace fill cup and module
26
February 1998
Ice Maker Troubleshooting Chart
Excessive Ice Production
Problem
Action
Shut-off arm not in actuator
Replace shut-off arm in actuator
Deformed shut-off arm
Replace shut-off arm
Broken shut-off lever or
lever bypassing vertical cam
Replace module
Broken module actuator
Replace module
Hollow Ice Cubes
Problem
Action
Low water fill volume
Adjust module screw, clear water path,
or replace water valve
Improper freezer air-flow
Direct air flow away from thermostat
Thermostat out of calibration
Replace thermostat
Apply alumilastic
Flooding or Ice in Bucket or Freezer
February 1998
Problem
Action
Thermostat out of calibration
Replace thermostat
Apply alumilastic
Jammed cube stalled in water-fill cycle
Remove cube
Determine reason for stall
Leaky water valve
Replace water valve
Excessive water fill volume
Replace water valve
Motor stalled in water-fill cycle
(12:00 ejector position)
Replace module
Contaminated module
Replace module
Refrigerator or ice maker not level
Level refrigerator or ice maker
Excessive water pressure
Decrease water pressure (20-120 psi) (1.4 - 8.2 bar)
Shorted and burned module shut-off
switch and contacts
Replace module
Broken locking tab on verticle cam
(Stalled in water fill)
Replace module
Fill-tube not properly positioned in
fill cup
Reposition fill tube
Fill cup water opening blocked
Replace fill cup
Cubes fall over back of ice maker,
melting in freezer
Replace fill cup
27
12074208
Ice Maker Wiring Diagram and Parts Layout
115
12074208
28
February 1998
Download PDF