Temperature Calibration Offset; Function Switch Connection; Transformer/Relay Board 1; Double Line Break K6 - Viking VEDO 273 Service Notebook

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.
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 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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