MARK V
4-3
POSSIBLE CAUSE(S) SUGGESTED REMEDY
D Potentiometer is bad.
D Temperature control board is bad.
D The potentiometer is approximately 900W and
can also be tested with an ohm meter. Connect
the test leads to the two outside wires of the poĆ
tentiometer to get the value of the pot. Leave one
lead connected to the outer wire of the potenĆ
tiometer. Move the other lead to the middle wire
of the potentiometer. To check the variable resistĆ
ance, turn the stem clockwise or counter clockĆ
wise. The reading should change from 0W to the
full value of the potentiometer.
Move the test lead from the outer wire to the other
outer wire of the potentiometer. Leave the middle
lead connected to your meter. Turn the stem
again to see the reverse effect.
D If both the probe and the pot are good and the the
heating system does not work the temperature
control board must be bad. Replace the board.
TABLE 1
DISPLAY ERROR CODES
INTELLITOUCH
HELP the temperature setting exceeds the maxiĆ
mum setting of 550_F. This will be shown as
an alternating HELP and PROB display.
PROB 1. Defective temperature probe.
2. Stripped insulation on probe wires.
3. Poor connection of probe terminals.
4. Probe sensing temperatures above or
below the probe sensing range.
8888 an Intellitouch computer failure.
INTELLIHOLD AND INTELLIPLUS
F2 Actual oven temperature is greater than the
maximum temperature setpoint
F3 Open temperature sensor
F4 Shorted temperature sensor while the conĆ
trol is in the cook mode.
F6 The 50/60 Hz input does not change states.
F7 Total chain timer over 24 hours
F8 The calculated EEPROM check sum is not
the same as the expected check sum reĆ
trieved from the EEPROM.
BLODGETT IQ CONTROL
NOTE: The error codes will appear in the top disĆ
play. All error codes are accompanied by
an audible alarm.
Hi Oven temperature is more than
40_F above the highest setpoint.
Prob Probe failure at greater than 693_F.
Probe (with alarm) - shorted temperture
probe.
HEAT ERR From a cool start (below 140_F), the
oven takes more than 10 minutes to
climb from 150Ć300_F.
FAN ERR Control thinks motor is not operating
FAN C ERR usually occurs when dirt or grease
collects on the veins of the blower
wheel causing centrifugal switch to
remain closed too long.
DOOR OPEN Occurs when a timer is activated
and the door is open. This fault self
clears once the door is closed.
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