Henny Penny Wendy's MP94 Series User manual

Wendy's MP94X Quick Reference Guide
Unit Operation
1. Turn unit on.
2. The time of day or " On " is displayed.
3. Press and hold the temperature button at any time to display the actual
temperature of the drawer. The led above the temperature button will blink
slowly.
Temperature Setpoint Programming
1. Press and hold the temperature button for 6 seconds. The actual
temperature will be shown first followed by the flashing setpoint.
2. Once the setpoint is flashing in the display, continue holding the temperature
button and press the SET button. Release all buttons. The setpoint is
flashing quickly in the display.
3. Use the up and down buttons to change to the desired setpoint. Hold in the
up or down buttons to change the setpoint value quicker.
4. Once the desired setpoint temperature is reached, press SET to exit setpoint-
programming mode.
Time of Day Clock Programming
1. Press and hold the SET button.
2. Use the up and down buttons to program the desired time. Hold in the up or
down button to change the time value quicker.
3. Once the desired time value is reached, release the SET button.

Special Program Mode
1. Turn off unit. Press and hold both the up and down buttons and turn unit
back on. Hold in on the up and down buttons until SP is displayed, then
release the up and down buttons. Display will then show "°F" or "°C".
2. Press up or down buttons to toggle from "°F"(Fahrenheit) to "°C"(Celsius) or
vice versa.
3. Press and release the SET button. "CAL" will now be displayed. Press and
hold the temperature switch and the actual temperature will be displayed.
Use the up and down buttons to calibrate to the desired temperature. Make
sure the actual temperature of the unit is stable before attempting a
calibration. A good time to calibrate the unit would be 1 hour to 1 1/2 hours
after power up.
4. Press and release the SET button. "In-" will now be displayed. Press and
hold the up or down buttons and the message will count down "In-3", "In-2",
"In-1", "In-", "SYS". Once the messages are done the control is now
initialized to factory default settings and the up or down button can be
released. The control is now in normal mode.
5. Press and release the SET button. "OP" is displayed. This message is short
for outputs. Press the temperature button to toggle the heat output. The led
above the temperature tells if the heat output is on (led lit) or off . Press the
down button to toggle the display digits and the rest of the leds.
6. Press and release the SET button. "C=Y" means the time of day clock will be
the default display. "C=n" means that " On " will be displayed.
7. This is the last step in special programming, if the Set button is pressed and
released step 2 of special programming (the changing of the temperature
scale) will be entered.
8. Exit special programming by holding in on the Set button at any step.
NOTE:
If a value is changed the set button must be pressed to save the new value. Don't
change a value and turn off the control or the new value will not be saved. Use step 8
to exit special programming. Make sure the Set button is not held when moving through
the different steps of special programming unless the operator wants to exit special
programming.

Number of Drawers Programming
1. Turn unit off.
2. While holding in on the SET button and the number of drawers (i.e. 941 -> 1,
942 -> 2, etc.) turn on the power.
3. Turn unit off and back on again. Verify that the correct number of drawers is
present in the power up messages.
Error Codes
1. "E04" - control board too hot. Possible problem: Inadequate ventilation of
louvers. Unit placed in an area of intense heat.
2. "E06" - faulty temperature probe. Possible problems: probe connections are
loose, leads are cut or shorted, or probe is bad. Check connections and wire
schematic. If problem not fixed, replace probe.
3. "E41" - EEProm memory scrambled. Initialize board by pressing the up or
down buttons.
4. "HI" - Software hi-limit. Temperature in cabinet is too hot. Possible problem:
Relay failed in the closed position and heaters are locked on. Make sure
heater is not shorting out to chassis or this problem will reoccur.