Viking VCSB481 Service-Handbuch

SERVICE NOTEBOOK

BUILT-IN REFRIGERATOR

VCSB481 / VCSB482

VIKING RANGE CORPORATION, PO DRAWER 956, GREENWOOD, MS. 38930-USA

TABLE OF CONTENTS

Technical Information--------------------------------------------------------------------------- 4

Refrigerant Flow---------------------------------------------------------------------------------- 5

Cabinet Air Flow--------------------------------------------------------------------------------- 6

Machine Compartment Air Flow-------------------------------------------------------------- 7

Component Specifications---------------------------------------------------------------------- 8

Display Panel Keyboard------------------------------------------------------------------------ 10

Electronic Functional Description------------------------------------------------------------- 11

Program Mode------------------------------------------------------------------------------------ 13

PC Board Layout--------------------------------------------------------------------------------- 16

Wiring Diagram----------------------------------------------------------------------------------- 18

Freezer Compartment Theory of Operation--------------------------------------------------- 18

Wiring Diagram----------------------------------------------------------------------------------- 19

Refrigeration Compartment Theory of Operation-------------------------------------------- 19

Wiring Diagram----------------------------------------------------------------------------------- 20

Refrigeration and Freezer Compartment Theory of Operation----------------------------- 20

Wiring Diagram----------------------------------------------------------------------------------- 21

Adaptive Defrost Theory of Operation-------------------------------------------------------- 21

Full Wiring Diagram----------------------------------------------------------------------------- 22

Ice Maker (Operation)--------------------------------------------------------------------------- 23

Ice Maker (Testing Procedures)---------------------------------------------------------------- 23

Ice Maker (Disassembly Procedures)---------------------------------------------------------- 24

Water Fill Valve Adjustment------------------------------------------------------------------- 25

Troubleshooting Chart--------------------------------------------------------------------------- 28

Ice Maker Wiring Diagram and Parts Layout------------------------------------------------ 32

TECHNICAL INFORMATION

•

••

•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 for design, disassemble, ice maker, safety, testing, and

troubleshooting information.

To avoid electrical shock which can cause severe personal injury or death, disconnect power to

the 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

ower usin

ower switch.

Model VCSB481SS

Capacity 28.57 cu. ft.

Electrical 120 VAC

Requirements 60 Hz

Separate Circuit 15 Amp

Refrigerant type 134A

Width 47 ½”

Depth 24”

Without Handle

Includes Door

Extrusions

Height Range 83 ¼” - 84

Rollers to Top

Of Ai G ill

No Load Performance Controls in Normal Position

Kw /24 hr

±0.4

Percent Run

Time ±10%

Cycles /

24hr

±25%

Refrigerator

Center

Compartment

Food

Average

Tem

erature

Freezer

Compartment

Food Average

Temperature

±±

±3°F

Temperature Relationship Test Chart

T-1

Outlet

±3°F

T-2

Inlet

±3°F

T-3 Suction

Line

±7°F

Average Total

Wattage

±10%

Suction Pressure

±2 PSIG

Head Pressure

±5 PSIG

Ambie

nt 65°

110° 65°

110° 65° 110°

REFRIGERANT FLOW

MACHINE COMPARTMENT AIR FLOW

Component Specifications

Switch, refrigerator light Type SPST, NC

(Right opening door hinge) Volt 125 / 250 VAC

Current 3 Amps

Switch, power Type DPST

Volt 125 / 250 VAC

Current 15 Amps

Switch, freezer light, sealed Type SPST, NC

Volt 125 / 250 VAC

Current 5.0 Amps.

Switch, showroom Type SPDT

Volt 125VAC

Current 6 Amps

Thermister Check resistance across

Terminals. Bell curve

Resistance (see page 13)

@77°F 30,000 ohms ±1% ohms

@45°F 68,000 ohms ±2% ohms

Thermostat Volt 120VAC

Watt 1000 Watts

Current 10 Amps

Resistance across

terminals

Above 55°F ±6°F Open

Below 20°F ±8°F Closed

Between 55°F ±6°F

And 20°F ±8°F Will stay in current state (either

Open or closed) until either 55°F

±6°F and 20°F ±8°F is reached.

Valve, water Volt 120VAC, 60Hz.

Watt 20 Watts

Water pressure (inlet)

Max 120psi

Min 20psi

Fill rate 140 ±10 CC’s at 7.5 seconds.

Component Specifications

Component Description Test Procedures

Bulb Volts 120VAC

Watts 40 watts

Capacitor, compressor run Volts 220VAC

Capacitance 15 µfc + 10%

- 5%

Compressor Type Fan cooled, R134a refrigerant

BTUH 970 BTUH

Volts 120VAC 60Hz

Watt 176 watts

Current: Lock rotor 21.3 A

Full load !.6 A

Resistance: Run windings 2.60Ω

Start windings 4.35Ω

Drier Drier must be changed every time the system is opened

for testing or compressor replacement.

Desiccant (20) 8x12.4AXH – 7 M. S.-Grams

Heater, evaporator Volt 120VAC

Wattage 450 ±5% W

Resistance 30 ±5% Ω

Component Specifications

Motor, condenser PSC Volt 120 VAC

Rotation (facing end opposite shaft) Clockwise

RPM 1300 RPM

Watt 6.4 Watts

Current 0.05 Amp

Resistance 480 Ω

Motor, ECM evaporator Volt 120VAC

fan. Rotation (facing shaft) Counterclockwise

RPM 2150 RPM

Watt 1.4 Watts

Motor and blade, Volt 120VAC

Refrigerator, condenser, Rotation (facing shaft) Counterclockwise

evaporator fan. RPM 3300 RPM

Watt 1.4 Watts

Overload Volt 120VAC

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

(925°C) 14 amps.

Relay Resistance with power off check

across terminals 2 & 3. 3 – 12 Ω

Shorted 0 Ω

Open very high or infinite ohms.

Switch, auger Type DPST, NO

Volts 250 / 125 VAC

Current 10 / 5 Amp.

Switch, refrigerator light Type SPST, NC

(left opening door hinge) Volt 125 / 25 VAC

Current 3 Amps.

DISPLAY PANEL KEYBOARD

Display Panel Operation

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.

Command Accepted Tone

Three short tones indicate command accepted.

Display On Pad

1. Activates control panel. Control panel

remains active at least 10 minutes.

2. Turns off Power Up Alarm (flashing lights)

after power is first plugged in or after power

outage.

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 Higher Temp or Lower Temp Pad.

Ref Temp Pad

Activates refrigerator temperature setting mode.

1. Refrigerator indicator light will glow.

Refrigerator temperature setting will be

displayed. Factory setting is 5.

2. Change refrigerator temperature setting by

pressing Higher Temp or Lower Temp Pad.

Higher Temp 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 Higher Temp Pad.

2. Press and hold Higher Temp pad to raise

temperature setting at a faster rate.

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