Viking VCSB483D Service manual

VCSB483D# -- DFSB483D# --DDSB483D#
COVER
F90597

SERVICE NOTEBOOK
REFRIGERATION
VCSB483D# -- DFSB483D# -- DDSB483D#
VIKING RANGE CORPORATION, P.O. DRAWER 956, GREENWOOD, MS 38930-USA
F90597

TABLE OF CONTENTS
VCSB483D# with Ice and Water-------------------------------------------------------------------- 4
Cabinet Air Flow-------------------------------------------------------------------------------------- 5
Machine Compartment Air Flow-------------------------------------------------------------------- 6
Refrigerant Flow--------------------------------------------------------------------------------------- 7
Water Flow--------------------------------------------------------------------------------------------- 8
General Specifications-------------------------------------------------------------------------------- 9
Compressor Specifications---------------------------------------------------------------------------- 10
R134a Refrigerant Service Information------------------------------------------------------------- 11
Safety Precautions-------------------------------------------------------------------------------------- 12
Equipment and Tools----------------------------------------------------------------------------- 13-16
Evacuation and Charging--------------------------------------------------------------------------- 17-18
Display Panel Operation------------------------------------------------------------------------------ 19
Alarms--------------------------------------------------------------------------------------------------- 20
Electronic Functional Description------------------------------------------------------------------- 20
Mode A and Mode B----------------------------------------------------------------------------- 21-23
Refrigerator / Freezer Thermister Resistance------------------------------------------------------- 24
Factory Set Freezer / Refrigerator-------------------------------------------------------------------- 24
Reading Temperature Display------------------------------------------------------------------------ 24
Temperature Offset Calibration---------------------------------------------------------------------- 24
Low Voltage Board Check Points------------------------------------------------------------------- 25
High Voltage Board Check Points------------------------------------------------------------------ 26
Wiring Diagram VCSB483# (no Water or Ice in door) Dispenser---------------------------- 27
Wiring Diagram VCSB483D# (Dispenser Model)------------------------------------------------ 28
Variable Capacity Compressor (VCC) Control Unit--------------------------------------------- 29
Speed Control Interface------------------------------------------------------------------------------ 30
Wiring Schematic-------------------------------------------------------------------------------------- 31
Freezer Compartment Theory of Operation-------------------------------------------------------- 32
Refrigeration Compartment Theory of Operation------------------------------------------------- 33
Refrigeration and Freezer Compartment Theory of Operation---------------------------------- 34
Compressor Starting Procedures-------------------------------------------------------------------- 35
Compressor Normal Operation Mode-------------------------------------------------------------- 35
Inverter Shutdown and Protections----------------------------------------------------------------- 36
Adapter Board Logic Flowchart--------------------------------------------------------------------- 37
Control Board Operations----------------------------------------------------------------------------- 38
Troubleshooting Guide------------------------------------------------------------------------------39-40
Ice and Water Dispenser------------------------------------------------------------------------------- 41
Water Filter---------------------------------------------------------------------------------------------- 42
Water Filter Bypass Instructions
Standard Installation-------------------------------------------------------------------------- 43
Water Filter Bypass Instructions------------------------------------------------------------- 44
System Specification and Performance Data Sheet------------------------------------------------ 45
Water Line Connections------------------------------------------------------------------------------- 46
Icemaker-----------------------------------------------------------------------------------------------47-51
3

VCSB483D# with ICE and WATER
4

CABINET AIR FLOW
5

MACHINE COMPARTMENT AIR FLOW
6

REFRIGERANT FLOW
7

WATER FLOW
8

WARNINGS
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
grounding and polarization. After servicing, reconnect power using power switch.
DC Compressor – Do Not Connect to 120VAC
9

SPECIFICATIONS AND FEATURES
The VCC receives one of 3 signals from the adaptor board: OFF, E frequency, and H
frequency.
OFF STATE CRITERION
The VCC control signal is OFF whenever the voltage drive to the compressor relay is off.
H(HIGH COOLING CAPACITY) STATE CRITERIA
The VCC control signal goes to the H frequency when any of the following conditions are
detected
:
•
The first compressor cycle after power restoration. The high capacity provides a faster
initial pull-down to control temperature
.
• The compressor duty cycle exceeds DCHT, 90%. Once triggered, this mode persists until
the duty cycle drops below DCHX, 50%. A high external ambient increases the duty
cycle.
• Compressor operation for more than 3 hours. The longest normal run time at 90°F is 2.5
to 3 hours. A longer run time implies the user activated the maximum refrigerate or
maximum freeze mode or there is an unusual cooling load. The mode persists until the
duty cycle drops below DCHX.
E(EFFICIENT COOLING STATE CRITERION
The VCC control signal assumes the Estate when none of the conditions above for the Hstate
are valid.
Note: Compressor Speed = Frequency x Motor Constant
10