Electric Oven Service Manual

TROUBLESHOOTING
29
Overview of Troubleshooting
This section contains information on the
following:
- Fault code descriptions
- Fault code troubleshooting
- Non-fault code troubleshooting
Fault Code Descriptions
Fault codes are logged in a fault counter (page
16) for troubleshooting. Upon completing the
service call and restoring successful operation of
the oven, the technician should clear all faults
(see page 20).
F1: Blower Failure
This fault is displayed if for three consecutive
times the control board does not receive the
“status OK” signal from the BMSC.
The fault is cleared from the display if the
blowers successfully restart upon starting a cook
cycle or in
TEST MODE.
F2: Low Temp During Cook
The oven will emit a beeping noise and display
this fault if the cook cavity temperature falls
25°F (14°C) below the current cooking profile’s
set temperature, and the fault will be logged in
the fault counter.
The fault is cleared from the fault display if the
cook cavity temperature returning to within
25°F (14°C) of the set cooking temperature
during cooking or in
TEST MODE.
F3: Flameout
This fault is displayed if the flame fails to light
three consecutive times at startup, or once the
oven reaches the cooking temperature, the
flame goes out and fails to re-light three
consecutive times.
The fault is cleared from the display if the flame
succeeds to light when the user re-selects the
cooking profile.
F4: Emergency Stop
This fault is displayed when the emergency stop
key is pressed.
This fault acts as a counter that logs how many
times the emergency stop key (page 9) has been
pressed.
The fault is cleared from the display once the
oven is restarted.
F5: CC Over Temp
This fault is displayed if the cook cavity’s tem-
perature reaches or exceeds 625°F (329.4°C).
The fault is cleared from the display once the
oven is restarted and the temperature recedes
below 625°F (329.4°C).
F6: EC Over Temp
This fault is displayed if the equipment cham-
ber reaches 149°F (65°C); however, the oven
will not shut down and the fault will not be
logged in the fault count log unless the equip-
ment chamber reaches 158°F (70°C).
The fault is cleared from the display when the
equipment chamber temperature falls below
149°F (65°C).
F7: RTD Failure
This fault is displayed if the RTD circuit is
open, shorted, reads above 645°F (340.5°C), or
reads below -40°F (-40°C).
The fault is cleared from the display if the RTD
circuit is closed, or the temperature reads within
645°F (340.5°C) and 40°F (-40°C)