Viking VUAR140 Troubleshooting Guide download pdf (Page 40)

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° F. lower. To avoid

over adjusting oven move temperature -5° each

time.

5. To increase oven temperature (for warmer oven)

press + until positive num

bers appear. Oven can

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

adjusting oven, move temperature 05° 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 relay for door lock, oven light, bake, and broil, are

controlled b

y approximately 24 VAC signal from the

ERC. Input voltage is 102-132 VAC.

Testing of the relays is with voltage applied to oven

after attaching voltmeter leads to appropriate

terminals.

Double Line Break –K6

Drive voltage (24 VAC) indicated at J1 connector pin

1 and 3

1. Turn off power to oven.

2. 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 24 VAC is indicated, the double line break

rela

y 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 24 VAC is indicated, bake relay is opening.

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

modul

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

relay module.

4. Turn on power and touch broil pad.

5. If 24 VAC is indicated broil is operating.

Oven Light Relay –K10

Drive voltage at J1 connector pins 1 and 4.

1. Turn off power to oven.

2. Attach voltmeter lead to E3 (neutral) connector

on relay

module.

3. Attach voltmeter lead to E17 connector on relay

modul

4. Turn on power and touch oven light pad.

5. If 120 VAC is indicated, oven light relay is

operat

ing.

Door Lock Relay –K3

Double line break relay okay. Drive voltage at J1

connector pins

1 and 9.

1. Turn off power to oven.

2. Attach voltmeter lead to E3 (neutral) connector

on relay

module.

3. Attach voltmeter lead to E8 connector on relay

module.

4. Turn on power and program cleaning cycle

operation.

5. Two indications will be present during this test.

a. 120 VAC will be present when the lock

assembly

is being engaged.

b. 0 VAC is indicated when the door is

locked and cleaning is operational.

Display (Filament) Voltage

1. Turn power on, turn meter to VAC scale.

2. Touch meter lead to J1-1 terminal.

3. Touch meter lead to J1-14 terminal.

4. Meter should indicate 3.VAC.

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Viking VUAR140 Troubleshooting Guide Page 40

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