Preventative Maintenance; Temperature Calibration - Wells M4200 Owner's Manual

PREVENTATIVE MAINTENANCE

THE FOLLOWING PROCEDURE IS TO BE PERFORMED BY QUALIFIED PERSONNEL ONLY
PRECAUTIONS:
FREQUENCY:
TOOLS:

TEMPERATURE CALIBRATION

1. Verify power cord is plugged into appropriate supply.
2. Use a digital thermometer with oven probe. Open the oven door and clamp the probe to the center
of the middle rack.
3. Route the probe wires between door gasket segments on the right corner of the oven. Close the
oven door. Plug the probe into the digital thermometer.
4. Press the POWER SWITCH to ON. Wait at least 30 minutes for temperatures to stabilize.
No cooling timer or bake cycle can be active.
ACTION
a) To enter programming mode, press and hold
PROG button for 5 seconds
b) Press #2 or #8 button
c) Press PROG button to display oven temp
in Fahrenheit and Celsius
d) Compare displayed temp with the digital thermometer reading. CAL TEMP should read within
±3ºF (±1ºC) of temperature on the digital thermometer. If temperatures are within 3ºF (1ºC) of
each other, proceed to Step f. If the difference between temperatures exceeds 3ºF (1ºC),
proceed with Step e.
e) Change the CAL TEMP to match the thermometer reading. Use the "2" button to increase
CAL TEMP and "8" button to decrease the CAL TEMP. Always increase or decrease CAL TEMP
in increments of 3 - 5 degrees, then wait about 1 minute for the oven to adjust. You may not see
an immediate change in CAL TEMP when "2" or *"8" is pressed. Repeat as necessary.
IMPORTANT: Pressing CANCEL at any time while in the TEMP CAL mode will cause any
changes to be ignored. These changes will neither be saved nor implemented.
f) Press PROG button to view the following defaults. Stop when you hear a beep and UPDATING
SYSTEM is flashed on the display. Any changes have been saved.
g) Press the CANCEL button to exit programming mode OVEN READY
CAUTION:
BURN HAZARD
Oven and inner door surfaces
are hot. Wear appropriate
protective gloves.
TEMPERATURE CALIBRATION
BURN HAZARD - Wear appropriate protective gloves
Monthly
Digital Thermometer with Oven Probe
DISPLAY WILL READ
TEMP CAL
TEMP CAL
CAL TEMP xxxF yyyC
where xxxF is ºF and yyyC is ºC
DEFAULT MENU
RISE TME
DETECT CURRENT
CAL CURRENT
TIME
UPDATING SYSTEM
TEMP CAL
Remove temperature probe
from oven before use.
26
NO
YES
10:00
NO
NO
(Ex: 00:00:00)
NO