Viking VUAR140 Troubleshooting Guide download pdf (Page 49)

TESTING PROCEDURES

Temperature Calibration Offset

The ERC incorporates ± 35°F calibration offset

capabilities for the oven. This adjustment will not

effect the cleaning cycle temperature and will remain

in memory if power is interrupted. Follow the

procedures as listed to calibrate oven.

1. Press BAKE pad.

2. Press + until an oven temperature greater than

500°F shows in display.

3. Immediately press and hold BAKE pad until “00"

appears in display, approximately 5 seconds.

4. To decrease oven temperature (for cooler oven),

press - until negative numbers appear. Oven can

be adjusted from -05° to -35° lower. To avoid

over adjusting oven move temperature -5° each

time.

5. To increase oven temperature (for a warmer oven)

press + until positive number appears. Oven can

be set from 05° to 35° higher.. To avoid over

adjusting oven, move temperature 5° each time.

6. Press OFF CANCEL pad. Temperature

adjustment

will be retained even through a power failure.

Function Switch Connection Check Procedure

The Quick Test mode can be used to verify relay

operation on the transformer/relay board. If the relay

engages (clicks) during Quick Test mode, it is

generally operative.

Transformer/Relay Board 1

The relays for oven light, bake, broil, convection

element, convection fan and double line break are

controlled by approximately 24VDC signal from the

ERC. Input voltage is 102 - 132 VAC.

Testing of relays is with voltage applied to oven after

attaching voltmeter leads to appropriate terminals.

NOTE: If bake, broil, or convection do not work, the

first test would be the relay for double line break.

Double Line Break --K6

Drive voltage (24VDC±) indicated at J1 connector

pins 1 and 3.

1. Turn off power to oven.

Attach voltmeter lead to E1 connector on relay board

3. Attach voltmeter lead to E18 connector on relay

module.

4. Turn on power and touch bake, broil, or

convection.

5. If 120VAC is indicated, the double line break

relay is closing. Otherwise, replace the

transformer/relay board.

Bake Relay -- K4

Double line break relay okay. Drive voltage at J1

connector Pins 3 and 5.

1. Turn off power to oven.

2. Attach voltmeter lead to E18 connector on relay

board.

3. Attach voltmeter lead to E11 (BK) connector on

relay module.

4. Turn on power and touch the bake pad.

5. If 240 VAC is indicated bake relay is operating.

Broil Relay -- K5

Double line break relay okay. Drive voltage at J1

connector Pins 3 and 6.

1. Turn off power to oven.

2. Attach voltmeter lead to E18 connector on relay

board.

3. Attach voltmeter lead to E12 (BR) connection on

`relay module.

4. Turn on power and touch broil pad.

5. If 240 VAC is indicated broil relay is operating.

Convection Element Relay --K2

Double line break relay okay. Drive voltage at J1

connector Pin 3 and 11.

1. Turn off power to oven.

2. Attach voltmeter lead to E18 connector on relay

board.

3. Attach voltmeter lead to E6 (CV EL) connector

on relay module.

4. Turn on power and touch convection pad.

5. If 240 VAC is indicated convection element relay

is operating.

Convection Fan Relay --K1

Drive voltage at J1 connector Pins 1 and 7.

1. Turn off power to oven.

2. Attach voltmeter lead to E3 (neutral) connector on

relay board.

3. Attach voltmeter lead to E4 (CVF) connector on

relay module.

4. Turn on power and touch convection pad.

5. If 120 VAC is indicated convection fan relay is

operating.

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Viking VUAR140 Troubleshooting Guide Page 49

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