tech-sheet-12074207 - Appliance Tech Manuals

tech-sheet-12074207
AmanaÒ Technical Information—Refrigerator

S148CA03 P1305501W S148CA01 P1305502W

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 S148CA01 S148CA03 Capacity 28.6 cu ft 28.6 cu ft Electrical 115 VAC 115 VAC requirements 60 Hz 60 Hz separate circuit 15A 15A Refrigerant R134a R134a type amount 47 47 Width without side 24 243/4 extrusions Depth 831/4 –841/64 831/4 –841/64 without handle includes door extrusions Height range rollers to top of air grille

No Load Performance Controls in Normal Position

Refrigerator Center Freezer Compartment Compartment Food Food Average Temperature ±3°F Percent Run Cycles/24 hr Average Temperature 65° 90° 110° Time ±10% ±25% 3 3 3 Kw/24 hr ± 0.4 65° 90° 110° ±3°F 65° 90° 110° 28 52 100 65° 90° 110° Ambient°F 1.2 2.3 4.2 30 32 0 65° 90° 110°

39 39 45

Temperature Relationship Test Chart

T-3 Suction Line Average Total Suction Pressure Head Pressure

T-1 Outlet ±3°F T-1 Inlet ±3°F ±7°F Wattage ±10% ±2 PSIG ±5 PSIG

Ambient°F 65° 110° 65° 110° 65° 110° 65° 110° 65° 110° 65° 110°

-14 -14 -14 -14 25 103 157 168 0 0 110 157

Return Technical Sheet to envelope after service

September 1997 1 12074207

Refrigerant Flow

CONDENSER

DRIER

SUCTION COMPRESSOR TUBE COMPRESSOR CAPILLARY DISCHARGE TUBE TUBE TO CONDENSER

POSTCONDENSER BRAZED JOINT FLANGE LOOP (EXCEPT FOR (FED AFTER THIS JOINT CONDENSATE PAN POSTCONDENSER SERPENTINE) LOOP IS ONE CONTINUOUS CENTER COPPER TUBE) MULLION LOOP (FED AFTER EVAPORATOR CONDENSER) CONDENSATE PAN CONDENSATE PAN SERPENTINE (FED (INSTALL WITH AFTER CENTER SERPENTINE MULLION LOOP) INSIDE PAN FOR PROPER EVAPORATION) September 1997

12074207 2

Cabinet Air Flow REFRIGERATOR AIR SUPPLY TUNNEL TO EVAPORATOR FRESH FOOD DC FAN FAN ASSEMBLY (ELECTRONICALLY EVAPORATOR CONTROLLED)

CRISPER AIR SUPPLY REFRIGERATOR RETURN AIR TUNNEL

September 1997 3 12074207

Machine Compartment Air Flow CONDENSER FAN ASSEMBLY CONDENSER DRIER COMPRESSOR

12074207 4 September 1997

Component Specifications

A3079001 Bulb Volt 115 VAC W att 40 watts

C8931604 Capacitor, compressor run Volt 220 VAC Capacitance 15 Mfd +10%

-5%

12049701 Compressor Type Fan Cooled, R134a refrigerant BTUH 1130 BTUH Volt 115 VAC 60 Hz W att 205 watts Current 21.3 amps Lock rotor 1.8 amps Full load Resistance 2.60 ohms Run Windings 4.35 ohms Start Windings

B2150504 Drier Drier must be changed every time the system is opened for testing or compressor replacement.

Desiccant (20) 8 x 12 4AXH – 7 M.S. -Grams

10428411 Heater, evaporator Volt 115 VAC W attage 450 ± 5% watts Resistance 30 ± 5% ohms

10522103 Motor, condenser PSC Volt 115 VAC, 60 Hz Rotation (facing end opposite shaft) Clockwise RPM W att 1300 RPM Current 6.4 watts Resistance 0.05 amps 480 ohms

10654208 Motor, ECM evaporator fan Volt 115 VAC, 60 Hz Rotation (facing shaft) Counterclockwise RPM 2600 RPM W att 3.4 watts

12075002 Motor and blade, refrigerator fan Volt 24 VDC Rotation (facing shaft) Counterclockwise RPM 2200 RPM W att 2.4 watts

September 1997 5 12074207

Component Specifications

10377015 Overload Volt 115 VAC Ult. trip amps @ 158°F (70°C) 3.51 amps Close temperature 142°F (61°C) ±9° Open temperature 257°F (125°C) ±5° Short time trip (seconds) 10 seconds Short time trip (amps @ 77°F 14 amps (25°C))

10097202 Relay Resistance W ith power off check: 3 12 ohms Across terminals 2 & 3 0 ohms Shorted Very high or infinite ohms Open

12235201 Switch, Keyboard

Switch Functions Continuity Enable Key S1 Pin #3 and #4 Freezer Temperature S2 Pin #3 and #6 Refrigerator Temperature S3 Pin #3 and #7 W armer S4 Pin #6 and #7 Colder S5 Pin #4 and #6 Vacation S6 Pin #4 and #7 Max Cool S7 Pin #7 and #8 Fast Freeze S8 Pin #4 and #5 Alarm Off S9 Pin #4 and #8 Display Off S10 Pin #5 and #8

C3680306 Switch, fan Type DPST, NO Volt 250/125 VAC Current 10/5 amps

12074904 Switch, refrigerator light Type SPST, NC Volt 125/250 VAC Current 3 amps

12074905 Switch, freezer light Type SPDT, NO Volt 125/250 VAC Current 10 amps

12074801 Switch, power Type DPST Volt 125 VAC Current 15 amps

12074207 6 September 1997

Component Specifications

10544502 Switch, showroom T ype SPDT V olt 125 VAC C urrent 6 amps

C8983701 T herm is tor C heck resistance across term inals Bell Curve resistance (See Page 11) 30,000 ohms 1% ohms @ 77 F 68,200 ohms 2% ohms @ 45 F

10442407 T herm os tat V olt 120 VAC W att 1000 watts C urrent 10 amps R esistance across term inals O pen Above 55° ±6°F C los ed Below 20° ±8°F W ill stay in current state (either open or closed) Between 55° ±6°F and until either 55° ±6°F and 20° ±8°F is reached. 20° ±8°F

12070801 Valve, water Volt 120 VAC, 60 Hz W att 20 watts W ater pressure (inlet) 120 PSI Max 20 PSI M in Fill rate 140 ±10 CC’s at 7.5 seconds

Additional Part Numbers

B5742603 Blade, condenser fan 12096901 Socket, light, dual 10855402 Blade, evaporator fan 10281601 Socket, light, single 12061901 Condenser assembly 12104901 Snugger, shelf 12144301 Crisper pan assembly 10423129 Utility bin 12144601 Crisper, pan 14036404 Utility bin lid 12073102 Deli drawer lid 12073202 Deli drawer top 12073302 Deli drawer 12183901 Dairy drawer assembly (refrigerator) 14036506 Egg tray 12197201 Evaporator 12201901 Freezer, wire shelf 12210901 Freezer, basket assembly 10933004 Gasket, freezer door 10933003 Gasket, refrigerator door R0197203 Ice maker module & motor assembly R0156669 Ice maker mold & heater assembly D7813004 Ice maker wiring harness R0161060 Ice maker thermostat (also order R0195019 alumilastic cement). D7877001 Ice maker shut off arm 12200801 Ice pan 12201601 Keyboard overlay 12192901 Shelf assembly (freezer door) 12192902 Shelf assembly (refrigerator door) 12144002 Shelf, refrigerator 12144001 Shelf, crisper

September 1997 7 12074207

Display Panel

FRZ REF HIGH MAX TEMP TEMP TEMP FRZ

COLDEST DOOR MAX OPEN REF

Temperature Display Lights

FRZ REF HIGH MAX TEMP TEMP TEMP FRZ

COLDEST DOOR MAX * Colder OPEN REF

Display Freezer Ref Warme Max Max Alarm Display On Temp Temp Ref Frz Off Off

Display Freezer Ref Warmer * Colder Max Max Alarm Display On Temp Temp Ref Frz Off Off

12074207 Display Panel September 1997 Keyboard

Display Panel Operation

Keyboard Pad Functions Max Ref Pad Activates Maximum refrigerator mode setting Entry Tone refrigerator to coldest setting for 24 hours or until Indicates a pad was pressed, command read and Max Ref pad is pressed again. 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 2. To adjust maximum refrigerator time refer to Mode Three short tones indicate command accepted. B functions.

Display On Pad Alarm Off Pad 1. Activates control panel. Control panel remains Turns off alarm signals. See Alarms section to interpret alarm signals. active at least 10 minutes. 1. Press and hold Alarm Off pad for 3 seconds to 2. Turns off Power Up Alarm (flashing lights) after deactivate Door Open alarm. To reactivate Door power is first plugged in or after power outage. Open alarm, press and hold Alarm Off pad for 3 seconds. Note: All pads, except Alarm Off, are inactive until Display On is pressed. 2. If Alarm Off pad is pressed and condition causing alarm is not corrected, alarm will reset. Freezer Temp Pad Activates freezer temperature setting mode. * 1. Freezer indicator light will glow. Freezer Activates Program Mode. See Program Mode section temperature setting will be displayed. Factory for description of functions available. setting is 5. 1. Open refrigerator door. 2. Change freezer temperature setting by pressing Warmer or Colder pad. 2. Press Display On pad.

Ref Temp Pad 3. Press * pad. Activates refrigerator temperature setting mode. 4. Within 6 seconds press the following pads in this 1. Refrigerator indicator light will glow. Refrigerator sequence: Max Ref, Max Frz, Max Ref, Max Frz. temperature setting will be displayed. Factory setting is 5. 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 2. Deactivates temperature indication area of control. tone is on, tone will sound at each bar level until top panel. level is reached. 1. Turn on temperature setting function of control

panel by pressing Warmer pad.

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.

September 1997 9 12074207

Electronic Functional Description

Power Disconnect Switch Thermistor Alarm Alarm sounds and freezer or refrigerator indicator light Use power disconnect switch to disconnect power shows and temperature indicators 4 through 7 will turn without unplugging refrigerator. Power disconnect on in sequence if either thermistor circuit opens. Refer switch is located behind air grille on top right side. to Temperature Control Operation Section and Refrigerator is shipped with power disconnect switch in Electronic Testing Section. the on position. 1. Press Alarm Off pad to turn off alarm. Showroom Switch 2. Alarm will retest for normal operation. If condition Showroom switch allows electronic controls and has not been corrected, alarm will sound again. 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.

Showroom switch

Power marAsl switch

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.

12074207 10 September 1997

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 Frozen Fresh Level by resistance levels of freezer and refrigerator Food Food thermistors. Cut-out Cut-out 9 F° (C°) ± F° (C°) ± 8 Refrigerator and Freezer Thermistor 1.5° 1.5° 7 Part # C8983701 -10 (-23) 29 (-2) 6 -8 (-22) 31 (-0.6) 5 Temp Resistance Temp Resistance -6 (-21) 33 (-0.6) 4 -5 (-21) 34 (1) 3 °F (°C) Ohms °F (°C) Ohms -4 (-20) 35 (2) 2 -3 (-19) 36 (2) 1 -20 (-29) 495600 36 (2) 87510 -2 (-19) 37 (3) Max Ref 0 (-18) 39 (4) Max Frz -15 (-26) 418200 38 (3) 82740 2 (-17) 41 (5) -10 (-23) -9 (-23) 354000 39 (4) 78300 —- —- 29 (-2) -6 (-21) 300600 43 (6) 74100

-4 (-18) 256200 45 (7) 70170

5 (-15) 218850 46 (8) 66450

10 (-12) 187470 48 (9) 62970

16 (-9) 161040 50 (10) 59670

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 the temperature decreases, resistance increases. As the temperature increases, resistance decreases.

An 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.

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 to be 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.

September 1997 11 12074207

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.

12074207 12 September 1997

Program Mode

Accessing Program Mode Mode B Functions

Two programming modes are available. Mode A allows Automatic Keyboard Function reading refrigerator and freezer thermistor Activate and deactivate keyboard by toggling temperatures. Mode B is used for all other Display Off pad. If high temperature indicator glows, programmable functions. keyboard will disable after 10 minutes. If high temperature indicator is off, keyboard is always 1. Open refrigerator door. enabled. DO NOT LEAVE KEYBOARD IN ENABLED 2. Press Display On pad. MODE AFTER PROGRAMMING IS COMPLETE.

3. Press * pad. Door Alarm Delay 1. Press Alarm Off pad. Door open indicator will glow. 4. Press the following sequence of pads within 6 seconds: Max Ref, Max Frz, Max Ref, Max Frz. One temperature indicator should glow indicating present delay setting in minutes (indicator 1 means 5. When access is granted, tone will sound three time 1 minute, 2 means 2 minutes, etc.) Default delay is and control will be in Program Mode A. Unmarked 3 minutes. indicator light will illuminate. 2. Press Warmer pad to decrease delay by 1 minute. 6. Toggle to Program Mode B by pressing Display On pad. Unmarked indicator light is off. 3. Press Colder pad to increase delay by 1 minute.

EEPROM Update in Control Memory Max Ref Run Time Duration 1. Press Max Ref pad. Max Ref light will glow. One EEPROM is permanent programmable memory of the control panel. temperature indicator should glow indicating Entry tone, door audio alarm and status are stored present Max Ref run time duration in 2 hour increments (indicator 1 means 2 hours, 2 means 4 in EEPROM after control panel is deactivated. hours, etc.) Default delay is 10 hours.

Information stored in EEPROM memory is not 2. Press Warmer pad to decrease Max Ref duration by affected by power loss. 2 hours.

Mode A Functions 3. Press Colder pad to increase Max Ref duration by 2 hours. Reading Temperature Display Max Frz Run Time Duration Temperature display will show thermistor temperature 1. Press Max Frz pad. Max Frz light will glow. One

in binary coded decimal format (BCD). Indicator lights 1 temperature indicator should glow indicating present Max Frz run time duration in 4 hour through 4 represent the tens digit with 1 being the most increments (indicator 1 means 4 hours, 2 means 8 hours, etc.) Default delay is 24 hours. significant bit. Indicator lights 5 through 8 represent 2. Press Warmer pad to decrease Max Frz duration by ones digit with 5 being the most significant bit. Positive 4 hours.

and negative are shown by indicator light 9; light glows 3. Press Colder pad to increase Max Frz duration by 4 hours. to show negative value

. VaVluaelwuhen Add together all lit indicators 8 1 through 4 according to their Indicator 4 values to obtain ten’s column 1 2 digit. Example if 3 and 4 are lit 2 1 the tens column total 3 (2 + 1 3 = 3) 4

5 8 Add together all lit indicators 5 through 8 according to their 6 4 values to get one’s column digit. Example if 6 and 7 are lit 7 2 the one column total 6 (4 + 2 = 6). The ex ample temperature 8 1 is 36º F. w ith coldest indicator not lit. Coldest +/-

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.

September 1997 13 12074207

Program Mode

Temperature Offset Calibration Exiting Program Mode Offset amount adjusts temperatures for refrigerator cut- ins and cut-outs by the amount of offset. The chart Press Display On pad for 3 seconds to exit Program below shows the indicator and the amount of offset from Mode. Tone will sound three times. Changes made in the factory default setting. Program Mode will be permanently saved in EEPROM.

INDICATOR OFFSET Note: If no pad is pressed for 10 minutes, Program 1 +8 Mode will be automatically exited. However, no 2 +6 changes will be saved if Program Mode exits 3 +4 automatically. 4 +2 5 0 6 -2 7 -4 8 -6 -8 Coldest

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.

12074207 14 September 1997

Electronic Testing 3. If terminal 7 on high voltage board changes with opening and closing of door, orange wire in low Electronic Testing Mode voltage harness is broken (check for continuity between pin 7 on high voltage board and pin 10 on Forced Defrost Start low voltage board) or low voltage board needs 1. Press Display On pad to activate control panel. replacing.

2. Simultaneously press and hold Max Ref and DANGER Display Off pads for 3 seconds. High Voltage Forced Compressor Start 1. Press Display On pad to activate control panel. 1. Check for line voltage on terminal E8 on high voltage board. With freezer door open, reading 2. Simultaneously press and hold Max Frz pad and should be 115 VAC. With door closed, reading Display Off pad for 3 seconds. should be approximately 0 VAC. If voltage does not change with light switch and light switch is turning Open Thermistor Detect 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 2. Check for voltage on pin 7 on pin connector of high on in sequence if either thermistor circuit opens. Refer voltage board. Output voltage should toggle with to Temperature Control Operation Section and toggling of light switch. If it does not toggle, high Electronic Testing Section. voltage board needs replacing.

1. Press Alarm Off pad to turn off alarm. 3. If voltage on pin 7 on pin connector on high voltage board changes with opening and closing of door, 2. Alarm will retest for normal operation. If condition orange wire in low voltage harness is broken (check has not been corrected, alarm will sound again. for continuity between pin 7 on high voltage pin connector and pin 10 on low voltage board) or low Evaporator Fan Suppression voltage board needs replacing. The evaporator fan will turn off every time either refrigerator or freezer door is open. To test if this function is operating:

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.

September 1997 15 12074207

Electronic Functional Description

WARNING

Ground

Line Voltage (L1) Transformer Neutral (L2)

Freezer Door Open

9309

Refrigerator Door 100-298-03 Open REF-AMP-03 SN. 2307 Defrost Heater 10627301 Defrost Heater Relay Defrost Terminator Capacitor Comp./Cond. Fan Power Switch

E3 12 Pin Connector September 1997 Comp./Cond. Fan Relay

Evaporator Fan Evaporator Fan Relay Fresh Food Fan

12074207 16

Electronic Functional Description

WARNING

Refrigeration and Defrost Component Checks Made at High Voltage Board

Low voltage board input W1 to D11 approximately -25 VDC 120 VAC High voltage board input E10 to E9 (Neutral) or ground approximately

Compressor/condenser fan motor “ON” = E4 to E9 (Neutral) ground approximately 120 VAC “OFF” = E4 to E9 (Neutral) or ground

Compressor/condenser fan motor “CLOSED” = R7 to ground approximately -11 VDC relay “OPEN” = R7 to ground approximately -25 VDC

Evaporator fan motor relay “CLOSED” = R8 to ground approximately -11 VDC “OPEN” = R8 to ground -25 VDC

Evaporator fan motor “ON” = E2 to E9 (Neutral) or ground approximately 120 VAC “OFF” = E2 to E9 (Neutral) or ground 0 VAC

Defrost heater “ON” = E6 to E9 (Neutral) or ground approximately 120 VAC “OFF” = E6 to E9 (Neutral) or ground 0 VAC

Defrost heater relay “CLOSED” = R9 to ground approximately -11 VDC “OPEN” = R9 to ground approximately -25 VDC

Defrost terminator “CLOSED” = E5 to E9 (Neutral) or ground approximately 120 VAC “OPEN” = E5 to E9 (Neutral) or ground 0 VAC

Fresh food fan output voltage “ON” = E1 to ground approximately -25 VDC High voltage board to fresh food fan “OFF” = E1 to ground 0 VDC

Fresh food fan input voltage “ON” = R10 to ground approximately -11 VDC Signal to high voltage board from “OFF” = R10 to ground approximately -25 VDC low voltage board

Filament voltage at pins 11 and 12 = less than 5 VAC

September 1997 17 12074207

Wiring Schematic

WARNING

DANGER

High Voltage

12074207 12261901 September 1997 PRINTED IN U.S.A.

S148CA03 P1305501W S148CA01 P1305502W

Wiring Diagram

WARNING

Pink wire is spare for service chich loops througout unit with leads available at several places. See wiring diagram.

12233902 PRINTED IN U.S.A.

September 1997 S148CA03 P1305501W 12074207 S148CA01 P1305502W

Ice Maker

Specifications

Mold heater: 185 watts, 264 ohms

Thermostat: Close 17 ±3°F (-8 ±1°C)

(bimetal) Opens 32° ±3°F (0°±1°C)

Water fill: 140 cc, 7.5 sec.

Motor cycle: Stamped in circuit.

Plug in connectors.

One revolution of blades takes

3 minutes plug stall time on ice

(eject and water fill).

Operation Testing Procedures

Thermostat closes when temperature reaches Verify ice maker has power, shut-off arm is down, and 17° ± 3°F (-8.3° ±1.5°C). Current flows through freezer is cold enough to close bimetal thermostat. thermostat to motor. See Ice Maker Wiring Diagram. Test point L and N will verify 120 volts to ice maker Motor is linked with drive gear. From module, there are copper contacts that ride on copper strips on backside module. of drive gear. As the drive gear rotates, contacts will Test points T and H will verify bimetal thermostat is make or break a circuit (tract) to the copper strips to operate ice maker. open or closed. All components can be tested without removing ice Verify test probes go into test points 1/2 inch maker or moving refrigerator away from installation. Remove cover. (1.25 cm). Test points are identified on module: 1. Short T and H with a shunt (insulated 14 gauge wire

N = Neutral side of line with ends stripped back 5/8 inch (1.6 cm)) to run motor. If motor runs, replace bimetal thermostat. If M = Motor connection motor does not run, replace module.

H = Heater Connection 2. Leave jumper in for half of revolution. Touch heater mold. If heater mold feels warm, heater is working T = Thermostat connection properly.

L = L1 side of line 3. Remove jumper. Water valve will be energized in last half of revolution if mold heater has not failed. V = Water valve connection

N ! Caution M To avoid ice maker damage do not short any contacts together other than those specified.

V H L T

12074207 20 September 1997

Ice Maker

Module Ohmmeter Checks No Power to Ice Maker and Ejector Blades in End of Cycle Position

Test Points Component Module Position Ohms L – H 264 L – M Mold and heater Attached to support 16,100 Motor Separated from heater

Module Voltage Checks with Meter or Test Light Power to Ice Maker

Test Points Component Line Voltage 0 Volts L – N Power off T – H Module Power on Closed L – H L – M Bimetal Open Off N – V Off Heater On Off

Motor On

Water valve On

Disassembly Procedures

Cover Module, Motor, and Support Assembly 1. Pull water adjustment knob forward. 1. Loosen both screws in module access ports. 2. Disconnect shut-off arm. 2. Snap off cover. 3. Pull mold from support assembly. Remove module only by removing 3 screws and pulling ! WARNING module out of housing. To avoid electrical shock which can cause severe personal injury or death, disconnect power to Shut-Off Arm refrigerator using power switch before servicing. 1. Pull shut-off arm out from white bushing. Wires removed during disassembly must be 2. Replace by pushing completely in. replaced on proper terminals to insure correct 3. Follow steps below. earthing and polarization. After servicing, reconnect power using power switch.

Shut off arm

Adjustment Module and Heater Assembly screw 1. Remove module and support assembly. 2. Install module and support assembly on Mold attachment screw access ports 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.

September 1997 21 12074207

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 Ejector blade M energized stop position 7.5 seconds 1:30 position V 140 cc fill 11:00 position Start position: thermostat closes,

motor on, heater on

L H

Mold and heater screw access ports Thermostat 6:00 position Ejector stall on ice, opens in this motor on ! Caution To avoid main assembly damage do not rotate range and (30 seconds to 5 minutes) blades or drive gear. heater is off 4:00 position

Switches will jam if turned counterclockwise and gears Water Fill Adjustment will be destroyed if turned clockwise. Advance ice maker into cycle by using a jumper to bridge H to R. Ice Turning water level adjustment screw will move contact maker will not run if motor is defective. Shut-off arm in relationship with contact ring segment. This causes must be in on position. contact to vary time water valve is energized. Contact There are several slotted shafts on motor assembly ring is tapered at end of fill time. board. Do not insert screwdriver and attempt to turn shafts. Slots permit assembly only. Turning screw clockwise decreases fill time. There are nonrepairable and nonreplaceable Turning screw counterclockwise increases fill time. components in module. When diagnosing or repairing 1/2 turn equals 20 CCor 1.2 seconds. ice maker, do not remove module unless replacing Full turn equals 40 CCor 2.4 seconds. module.

12074207 22 September 1997

Ice Maker

! Caution achieve mode temperatures easily. To avoid module damage do not rotate water Thermostat, mold heater, and wiring harness are adjustment screw more than one full turn in replaceable. Any other failure, including motor, requires either direction. replacement of module assembly. Replacement mold assembly comes with new mold heater installed. If water valve adjustment screw falls out, put screw in hole and align as shown below. Thermostat

1. Remove control box from mold by removing screws.

Screws

Water

N adjustment

screw

V H 2. Pull front of black housing free of mold. Thermostat L T is on mold side.

Thermostat

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 3. Grasp 1 thermostat clip and pull out. produce unacceptable cubes. Mineral content or sand 4. Press in new thermostat. Verify pins are properly can restrict screen in water fill valve or particle of sand can keep valve from seating properly. indexed. Electrical assembly does not need to be If water valve does not close, the following could occur: removed. If replacing module, transfer clips to new mold no ice production support. Use new thermal bonding material.

small or hollow ice cubes Wiring Harness

flooding of ice container Remove wiring harness by pressing retaining tab and pulling forward. 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.

Temperature Problems Press tab 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

September 1997 23 12074207

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 ±10CCat 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.

12074207 24 September 1997

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 Replace module switch and contacts

Stalled or stripped motor Replace module

2:30 Ejector Position

Contaminated module. Replace module

Motor won’t run when “T” and “H” test

points are shorted.

Open or missing thermostat Replace or install thermostat Apply alumilastic

No power to ice maker (harness) Determine discontinuity by tracing power

Jammed cubes Un-jam cubes Notice size and density of 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 Clear water line refrigerator

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 Replace mold and heater assembly contact module

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 Replace module mislocated shut-off switch

September 1997 25 12074207

Ice Maker Troubleshooting Chart

3:00 Ejector Position

Contaminated Replace module

Jammed cubes Un-jam cubes Notice size and density of 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 Replace fill cup ejection 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 Replace mold and heater assembly Motor should oscillate 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

Contaminated 6:00 Ejector Position Replace mold and heater assembly Insufficient water to ice maker, Apply alumilastic small or hollow cubes Refer to “Hollow Ice Cubes”

Contaminated 7:30 Ejector Position Motor will not oscillate Replace module Shut-off arm stuck in ice or obstructed Remove obstruction Cubes not formed properly Replace module Un-Jam Contaminated Check fill cup and fill tube assembly Cube frozen to fill cup or mold 9:00 Ejector Position Replace module Un-jam Replace fill cup and module

12074207 26 September 1997

Ice Maker Troubleshooting Chart

Problem Excessive Ice Production Shut-off arm not in actuator Action Deformed shut-off arm Replace shut-off arm in actuator Broken shut-off lever or Replace shut-off arm lever bypassing vertical cam Replace module Broken module actuator Replace module

Problem Hollow Ice Cubes Low water fill volume Action Improper freezer air-flow Thermostat out of calibration Adjust module screw, clear water path, or replace water valve

Direct air flow away from thermostat

Replace thermostat Apply alumilastic

Flooding or Ice in Bucket or Freezer

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 Replace module (12:00 ejector position)

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 Replace module switch and contacts

Broken locking tab on verticle cam Replace module (Stalled in water fill)

Fill-tube not properly positioned in Reposition fill tube fill cup

Fill cup water opening blocked Replace fill cup

Cubes fall over back of ice maker, Replace fill cup melting in freezer

September 1997 27 12074207

Ice Maker Wiring Diagram and Parts Layout

115

12074207 28 September 1997