Viking VCWB300 Diagnostic Check Points, Touch switch inputs with switches connected, typical

Page 13

DIAGNOSTIC CHECK POINTS

(Rfer to Wiring Schematic on Page 19)

Number

DescriptionA

E1

Display Board Send

1+5Vdc

2data signals

3ground

E2

Touch switch inputs (with switches connected), typical

1+5VDC

2Ground Common for measurements on E2

3Not connected

4When button is touched +4Vdc to +5Vdc, otherwise less than +1Vdc.

5When button is touched +4Vdc to +5Vdc, otherwise less than +1Vdc.

6When button is touched +4Vdc to +5Vdc, otherwise less than +1Vdc.

7+5Vdc

8

Ground Common for measurements on E2.

9Not connected.

10When button is touched +4Vdc to +5Vdc, otherwise less than +1Vdc.

11When button is touched +4Vdc to +5Vdc, otherwise less than +1Vdc.

12When button is touched +4Vdc to +5Vdc, otherwise less than +1Vdc.

E3

Outputs and line voltage inputs (loads connected) typical.

1Showroom switch off = 0V, on = 120VAC

2– 7 Not connected.

8Door switch open = 0V, closed = 120VAC.

9When Zone* is being cooled or service mode = 115 VAC , off = 0V

10When Zone* is being cooled or service mode = 115 VAC , off = 0V

11When Zone* is being cooled or service mode = 115 VAC , off = 0V

12When zone** is being cooled or service mode = 115 VAC , off = 0V

13When zone** is being cooled or service mode = 115 VAC , off = 0V

14When zone** is being cooled or service mode = 115 VAC , off = 0V

15When zone* lights to be on = 115 VAC , off = 0V

16Power line neutral. Common for all E3 measurements.

*E3 pin 9 Solenoid #1 / pin 10 Solenoid #2 / pin 11 Solenoid #3

**E3 pin 12 Evap. Fan #1 / pin 13 Evap. Fan #2 / pin 12 Evap. Fan #3.

NOTE: All wiring controlling Fan #3, Sol #3, and both #3 Thermisters have Black strips. All wiring controlling Fan #2, Sol #2 and both #2 Thermisters have Red strips. All wiring controlling Fan #1, Sol #1 and both #1 Thermisters have White strips.

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Contents BUILT-IN Full Height Wine Cooler Service NotebookMode of Operation Table of ContentsDiagnostic Check Points Electronic Function DescriptionGeneral Specifications Model VCWB300# Sealed System Control Panel Assembly Page Page Glass Mullion Shelf Showroom Switch The showroom switch Power Disconnect SwitchDisplay Panel Keyboard Lights Display Panel OperationDisplay Pad AlarmWine Cooler Leveling Hinge Adjustment Door Stop AdjustmentTouch switch inputs with switches connected, typical Diagnostic Check PointsOutputs and line voltage inputs loads connected typical Display Board IDB5D Display Board receive Compressor Relay Use E3 16 as common for measurementsFutaba VFD display data connection Mechanical Data General InformationApplication Electrical DataDEG. F Resistance Thermister Resistance ReadingSolenoid Valve / Evaporator Fan VCWB300 Wiring Schematic VCWB300 Wiring Diagram Troubleshooting Guide Problem Possible Cause Correction Problem Possible Cause Correction Troubleshooting Guide con’tCondenser Air / Flow Condenser Fan Fault Compressor FaultCondenser Air / Con Denser Fan Fault Evaporator Thermistor FaultRefrigerant Valve Solenoid Fault Thermistor FaultFan and Light Switch Lights Switched OnWiring Crossed Light SwitchUnit Switched Off Press unit On/Off key No Power from Check E15 to ground See Control BoardBad LED Board Replace control panel assembly Control Panel Ribbon Check control panel ribbon
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VCWB300 specifications

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