Contents hide
1 PRO48 Refrigerator
2 Product Information
2.1 Specifications:
2.2 Product Usage Instructions:
2.2.1 Important Safety Information:
2.2.2 Wiring Instructions:
2.2.3 Component Information:
2.3 Frequently Asked Questions (FAQ):
2.3.1 Q: Who should use this product?
2.3.2 Q: What should I do if I encounter difficulty during installation?
2.3.3 Q: Can I replace components on my own?
2.4 Documents / Resources
2.4.1 References

PRO48 Refrigerator

“

Product Information

Specifications:

  • Model: Pro-Series (648PRO)
  • Wiring Diagram Model: PRO48
  • Part Number: 3758388 REV D
  • High Voltage: 10-2

Product Usage Instructions:

Important Safety Information:

  1. This product is intended for use by qualified service personnel
    only.
  2. Disconnect the appliance from the electrical supply before
    beginning any service.
  3. Ensure all grounding devices are connected when the service is
    complete.
  4. Failure to observe the above warnings may result in severe
    electrical shock.

Wiring Instructions:

Follow the provided wiring diagrams and schematics for proper
installation and maintenance of the Pro-Series (648PRO) appliance.
Ensure all wires are connected securely and according to the
specified color codes.

Component Information:

    • Water Filter SW: Green
    • L1 Power L2 Supply Cord: Ribbed (White), Plain
      (Black)
    • Ref Compressor & Starting Relay: Solid
      Door Only (Red)
    • Ref Variable Speed Compressor: Glass Door Only
      (Black, Red, White, Gray)
    • Icemaker Water Valve: Various wire colors and
      connections

Frequently Asked Questions (FAQ):

Q: Who should use this product?

A: This product is designed for use by qualified service
personnel only. It is important to follow all safety guidelines and
wiring instructions provided in the manual.

Q: What should I do if I encounter difficulty during
installation?

A: If you encounter any difficulties during installation or
wiring, please contact our customer support for assistance. Do not
attempt to operate the appliance if you are unsure about the wiring
connections.

Q: Can I replace components on my own?

A: To ensure safety and proper functioning of the appliance, it
is recommended to have any component replacements or repairs done
by qualified service personnel who are familiar with the product
specifications.

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Wiring Diagrams/Schematics

Pro-Series (648PRO)

WIRING DIAGRAM MODEL: PRO48
PART NUMBER 3758388 REV D

– This wiring information is provided for use by qualified service personnel only. – Disconnect appliance from electrical supply before beginning service. – Be sure all grounding devices are connected when service is complete. – Failure to observe the above warnings may result in severe electrical shock.

WATER FILTER SW
GREEN

L1 POWER L2 SUPPLY CORD

RIBBED

WHITE

PLAIN

BLACK

REF COMPRESSOR & STARTING RELAY (SOLID DOOR ONLY)
RED

REF VARIABLE SPEED COMPRESSOR (GLASS DOOR ONLY)

BLACK RED

WHITE GRAY VARIABLE SPEED CONTROL BOX

VARIABLE SPEED
CONTROL BOX

ICEMAKER WATER VALVE
2 WHITE 1 2
1 GRN
LT BLUE BROWN BLACK GREEN

BLACK
TAN WHITE BLACK PURPLE

BLACK

2

WHITE

1

2

GRAY 1

GRN
LT BLUE BROWN BLACK GREEN

FRE VARIABLE
SPEED COMPRESSOR

AWECO REF VALVE
WHITE
WHITE/RED

GRN 2
1

95 3 2 48 67 1

CONDENSER FAN MOTOR

5

1 P6

1

P8

7

P3

P17 P18 P19
P14 P11 11

GREEN/YELLOW BLACK YELLOW
PURPLE GRAY BLUE
MAIN CONTROL
BOARD

24 1

P16

P412 20 1
P2 5
1
P5

P13 P15

P1

P12

1

WHITE BLACK
WHITE

1 DC POWER SUPPLY
2

TAN/WHITE WHITE/RED PINK WHITE/BLUE GRAY/WHITE ORANGE ORANGE/RED RED ORNAGE/BLACK ORNAGE/WHITE TAN WHITE

HINGE SWITCH GRAY/WHITE BLUE WHITE/BLUE GREEN/YELLOW ORANGE/RED PINK TAN

DRIVER
TOP ACCENT LIGHT

ORANGE WHITE

YELLOW ORANGE
FRE DOOR SWITCH

1

BLACK

2

BROWN

3

BLUE

6

WHITE

4

BLACK

5

BLACK

BLUE GRAY/WHITE
WHITE
ZONE 1 FRE

WHITE ORG/RED

UPR DRAWER LIGHT
ORG/RED

GRAY TAN/WHITE
RED BLACK PURPLE WHITE
TAN BLUE GREEN/YEL WHITE/BLUE GRAY/WHITE ORG/RED PINK ORANGE YELLOW WHITE
DEFROST HEATER
FILL TUBE HEATER

ORG/BLACK DRIVER
WHITE
TOP ACCENT LIGHT

WHITE/RED
TAN/WHITE RED
WHITE TAN ORG/WHITE
WHITE/BLUE GRAY/WHITE ORG/RED PINK ORANGE YELLOW

WHITE YELLOW ORANGE/WHITE

DRAIN TROUGH HEATER
1 BLUE 2 GRAY/WHITE
DEFROST TERMINATOR

WHITE

ZONE 3 REF
ORG/WHITE

YELLOW

UPR DRAWER LIGHT
YELLOW

YELLOW ORG/WHITE

YELLOW ORG/BLK
REF DOOR SWITCH

HINGE SWITCH

ZONE 1 UPPER DRAWER

WHITE ORG/RED GREEN/YELLOW ORANGE/RED PINK WHITE TAN

LWR DRAWER LIGHT

ICEMAKER

1 GRN/YELLOW WHITE
3 PINK TAN

DRAWER LIGHT
SWITCHES

ZONE 4 UPPER DRAWER

WHITE

ORG/WHITE

DRAWER LIGHT
SWITCHES

LWR DRAWER LIGHT

YELLOW ORANGE/WHITE

ZONE 1 LOWER DRAWER

ZONE 4 LOWER DRAWER

#3758440 – Revision C – November, 2019

HIGH VOLTAGE
10-2

Pro-Series (648PRO)

Wiring Diagrams/Schematics

WIRING DIAGRAM MODEL: PRO48
PART NUMBER 3758388 REV D

– This wiring information is provided for use by qualified service personnel only. – Disconnect appliance from electrical supply before beginning service. – Be sure all grounding devices are connected when service is complete. – Failure to observe the above warnings may result in severe electrical shock.

1

P13

P1

P15

P16

24 P17

P18
P19
P14 11
P11

BLACK

SENSOR (REF COND)

JACKET CABLE (MARK WITH 1 BLACK STRIPE NEAR SENSOR END)

SENSOR (FRE COND) JACKET CABLE

SENSOR (AMBIENT)

JACKET CABLE (MARK WITH 1 BLUE STRIPE NEAR SENSOR END)

5

1 P6

1

P8

7

P3

1

P12

MAIN CONTROL
BOARD

1 P4 20 2
1 P2
5 1

P5

RED 1 BLUE 4 YELLOW 5 WHITE 2

RED

YELLOW BLUE
WHITE

UPPER REF EVAP FAN MOTOR

BLACK/WHITE WHITE

BLACK/WHITE WHITE

JACKET CABLE (MARK WITH 2 BLUE STRIPES NEAR SENSOR END)

SENSOR (FRE CAB)

SENSOR (FRE EVAP)

JACKET CABLE (MARK WITH 2 GREEN STRIPES NEAR SENSOR END)

13

SIDE LED WHITE RED YELLOW/PURPLE YELLOW/BROWN BLUE/BLACK BLUE/WHITE

SENSOR (REF EVAP)

JACKET CABLE (MARK WITH 2 BLACK STRIPES NEAR SENSOR END)

SENSOR (REF CAB)

JACKET CABLE (MARK WITH 1 BROWN STRIPE NEAR SENSOR END)

13

SIDE LED

DOOR HEATER

FRE EVAP FAN MOTOR

RED
YELLOW BLUE WHITE

ZONE 1 REF

1 RED 4 YELLOW/BROWN
5 BLUE/WHITE 2 WHITE

WHITE/BLACK
ZONE 3 REF

(IN HINGE)

ZONE 1 UPPER DRAWER

RED 1 YELLOW/PURPLE 4
BLUE/BLACK 5 WHITE 2
SENSOR (REF LWR EVAP)

RED

YELLOW BLUE
WHITE

LWR REF EVAP FAN MOTOR

JACKET CABLE (MARK WITH 1 RED STRIPE NEAR SENSOR END)

ZONE 4 UPPER DRAWER

SENSOR (REF LWR CAB)

JACKET CABLE (MARK WITH 1 GREEN STRIPE NEAR SENSOR END)

ZONE 1 LOWER DRAWER
ICE MAKER

ZONE 4 LOWER DRAWER

LOW VOLTAGE
10-3

#3758440 – Revision C – November, 2019

Wiring Diagrams/Schematics

Pro-Series (648PRO)

WIRING SCHEMATIC MODEL: PRO48
PART NUMBER 3758388 REV D

– This wiring information is provided for use by qualified service personnel only. – Disconnect appliance from electrical supply before beginning service. – Be sure all grounding devices are connected when service is complete. – Failure to observe the above warnings may result in severe electrical shock.

BLACK WATER FILTER SW

L1 115 VOLTS 60 CYCLES

NEUTRAL

WHITE

RED

N.O.

1
P1 P13
P15 P16
P17 P18 P19
P14 P11

1

P4

P12

20

2

1 P2
5

1

P5

MAIN CONTROL
BOARD

P8

11

1

24
1 P3
7 1 P6 5

WHITE/BLUE

ORANGE/WHITE ORANGE/BLACK GRAY/WHITE ORANGE
ORANGE/RED
N.C. YELLOW
ZONE 3 DOOR SWITCH N.C.
YELLOW
ZONE 1 UPR DRAWER SWITCH N.C.
YELLOW
ZONE 1 LWR DRAWER SWITCH N.C.
YELLOW
ZONE 1 DOOR SWITCH N.C.
YELLOW
ZONE 4 UPR DRAWER SWITCH N.C.
YELLOW
ZONE 4 LWR DRAWER SWITCH

TAN/BLACK TAN PINK

295
IM

AWECO REF VALVE 2
WATER VALVE
160

M WHITE/RED

CONDENSER FAN MOTOR

ORANGE/BLACK

ZONE 3

DRIVER

TOP ACCENT DOOR LIGHT

WHITE WHITE WHITE
WHITE WHITE

ORANGE/RED ORANGE

ZONE 1 ZONE 1 ZONE 1

DRAWER LIGHT DRAWER LIGHT

DRIVER

TOP ACCENT DOOR LIGHT

WHITE WHITE WHITE

ORANGE/WHITE

ZONE 4 ZONE 4

DRAWER LIGHT DRAWER LIGHT

WHITE WHITE

2300-2900 FILL-TUBE HEATER WHITE

DEF HEATER 1
BLUE

WHITE

BI-METAL 1

TROUGH HEATER 1

WHITE

PURPLE
BLACK
BLACK
REFRIGERATOR COMPRESSOR
AND STARTING RELAY (SOLID DOOR)
GRAY

VSPEED CONTROL BROWN BOX FZ
BLACK

LT. BLUE LT. BLUE

WHITE

VSPEED CONTROL

BROWN

BOX REF BLACK

(GLASS DOOR)

WHITE

BLACK

WHITE

WHITE

WHITE

LOW VOLTAGE

DC POWER SUPPLY

LEFT DISPLAY BOARD
EXERNAL DEVICE

SERVICE DISPLAY
KEYPAD

1
P13 P1
P15
P16
P17 P18 P19
P14 P11
RIGHT DISPLAY BOARD

P12

1

P4

20

2

1 P2
5

1

RED WHITE
BROWN BLUE BROWN BLUE

THERMISTER 1 AMBIENT
THERMISTER 2 FRE COND

P5 BROWN
BLUE

BROWN BLUE
THERMISTER REF EVAP

THERMISTER REF CABINET
BROWN BLUE

BROWN

THERMISTER REF COND

BLUE

THERMISTER REF LWR CABINET

EVAPORATOR FAN ZONE 4 EVAPORATOR FAN ZONE 3 EVAPORATOR FAN ZONE 1

MAIN

24

CONTROL

BOARD

1

BROWN BLUE

THERMISTER FZ CABINET
BROWN BLUE

BROWN BLUE
THERMISTER FZ EVAP

THERMISTER REF LWR EVAP

P3 7

BLACK/WHITE WHITE WHITE
BLACK/WHITE

SIDE LIGHTS SIDE LIGHTS

11

P8

1

1 P6

5

B/W
WHITE BLACK WHITE

GLASS DOOR HTR

RED

BLUE/BLACK

YELLOW/PURPLE

M

M

M

YELLOW

BLUE

YELLOW/BROWN BLUE/WHITE

WHITE

#3758440 – Revision C – November, 2019

10-4

Pro-Series (648PRO)

Wiring Diagrams/Schematics

WIRING DIAGRAM MODEL: PRO48
PART NUMBER 3758388 REV D

– This wiring information is provided for use by qualified service personnel only. – Disconnect appliance from electrical supply before beginning service. – Be sure all grounding devices are connected when service is complete. – Failure to observe the above warnings may result in severe electrical shock.

TROUBLESHOOTING
To enter the Service Mode press and hold COLDER and then press POWER. To exit the Service Mode press ICE MAKER as needed.

SERVICE MODE MENU

SERVICE MODE 1) DIAGNOSITCS >

<DIAGNOSTICS 1) SELF TEST >

<SELF TEST START? >

{SELF TEST RUNNING}

SERVICE MODE 2) OP STATUS >
SERVICE MODE 3) MODEL INFO >

<DIAGNOSTICS 2) ERROR HISTORY >
<DIAGNOSTICS 3) THERMISTORS >
<DIAGNOSTICS 4) ACTIVATE ZONE >
<DIAGNOSTICS 5) STATISTICS >
<MODEL: PRO48 CHANGE MODEL? >

<ERROR HISTORY 1) VIEW HISTORY >

{SEE LIST OF SERVICE CODES IN CHART BELOW}

<ERROR HISTORY 2) CLEAR HISTORY >

NO? YES?

AMBIENT CONDENSERS ZONE #1 ZONE #2 ZONE #3 ZONE #4

AMBIENT CONDENSERS ZONE #1 ZONE #2 ZONE #3 ZONE #4

RUNNING TIME POWER CYCLES % RUN BETWEEN DEFROSTS % RUN 50 CYCLES COMPRESSOR CYCLES DEFROST AVERAGE TEMPS DOOR OPEN TIME ICE MAKER SELF TEST
<SELECT MODEL 1) PRO48

NO? YES?

SERVICE MODE 4) VERSION INFO >

CONTROL HVMICRO EECONF LT LCD RT LCD LOGGER KEYPAD S/N

<SELECT MODEL 2) PRO48G

NO? YES?

CONTROL CIRCUITS

ZONE 1 SPEED SIGNAL ZONE 4 TACHOMETER ZONE 3 TACHOMETER
UNUSED
ZONE 1 FAN TACHOMETER

EVAP 12 VDC POWER GROUND RETURN
EVAP FAN POWER 12 VDC UNUSED
ZONE 4 SPEED SIGNAL ZONE 3 SPEED SIGNAL UNUSED
485 NETWORK

GLASS DOOR HEATER GLASS DOOR HEATER
– SIDE LIGHT + SIDE LIGHTS

1
P8 P6

P11 P14 P19

LEFT DEFROST HTR

ZONE 1 EVAP SENSOR
ZONE 1 CABINET SENSOR ZONE 4 EVAP SENSOR ZONE 3 EVAP SENSOR
ZONE 4 CABINET SENSOR ZONE 3 CABINET SENSOR
RIGHT CONDENSOR LEFT CONDENSOR
AMBIENT

P18

P3

MAIN

CONTROL

P17

BOARD

P16

P5 P15

LEFT COMPRESSOR RIGHT COMPRESSOR MAIN LIGHTS L1

WHITE – 12 Vdc RED + 12 Vdc

P2

P13

NEUTRAL

P4

20

P12

1

REFRIGERANT VALVE
CONDENSER FAN ICEMAKER
ICE ACCESSORIES WATER FILTER INPUT

WATER VALVE INPUT ZONE 4 DRAWERS INPUT ZONE 3 DOOR INPUT ZONE 1 DRAWERS INPUT ZONE 1 DOOR INPUT ZONE 1 DEFROST BI-METAL INPUT
10-5

PRO48/PRO48G ZONES

ZONE 1

ZONE 3

ZONE 1
ZONE 1

ZONE 4
ZONE 4

#3758440 – Revision C – November, 2019

Documents / Resources

SUB-ZERO PRO48 Refrigerator [pdf] Owner's Manual
648PRO, PRO48 Refrigerator, PRO48, Refrigerator

References

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