TurboChef Encore Touch Rapid, Service Manual

Page: 71 / 116

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Overview of Troubleshooting
This section contains information on the
following:
- Fault code descriptions
- Fault code troubleshooting
- Non-fault code troubleshooting
For information on accessing Test Mode, see page
19. For information and illustrations on replacing
components, see the Appendix.
fault Code Descriptions
To view the fault log, see page 18.
f1: Blower Running Status Bad
This fault is displayed when the motor controller
indicates no running status.
The motor and motor controller are monitored
continuously in all modes with special handling in
Test Mode (see “Control Blower Speed” on page
20). If a fault is detected, the oven will stop cooking
and go to the “Cooling Down” screen while flashing
“F1: Blower.”
Upon turning on the oven, the control will attempt
to restart the motor. If the restart is successful, the
fault message will be cleared from the display. The
fault message is also cleared at the onset of cooking
or when the blower motor is tested in Test Mode
(page 20, section “Control Blower Speed”).
f2: Cook Temperature Low
This fault is displayed if the cook cavity temperature
drops more than 120ºF (67ºC) below the set
temperature during a cook cycle (registered after
five seconds into a cook cycle).
The fault is cleared from the display at the onset
of cooking if the cook cavity temperature is within
120ºF (67ºC) of the set temperature or when the
heaters are tested in Test Mode (page 19, section
“Top Heater Test” and “Bottom Heater Test”).
f3: Magnetron Current Low
This fault is displayed when the current transformer
(CT) on the I/O control board detects less than 10
amps. The fault is monitored when the microwave is
on during a cook cycle or in Test Mode.
The fault is cleared from the display at the onset of
a cook cycle if the CT detects 10 amps or greater, or
when the magnetrons are successfully energized in
Test Mode.
f4: Door Monitor Defective
This fault is displayed when the control detects that
the monitor interlock switch opens before the
primary or secondary interlock switches. Additionally,
this fault will blow the 20-amp F3 fuse if the micro-
wave high voltage system is energized when the fault
occurs. The fault is cleared from the display when
the oven is powered off and then back on.
NOTE: Door interlock switches are in parallel.
For the oven schematic, see page 64. The fault is
monitored during a cook cycle and in Test Mode
when the microwave is on (see “Test Mode” on page
19).
f5: Magnetron Over Temperature
This fault is displayed if either magnetron
thermostat reaches 270ºF (138ºC), or if either
thermostat connector is disconnected.
The thermostats will reset automatically, and
are wired in series. The fault is cleared from the
display at the onset of a cook cycle if the thermostat
is closed and connected properly.
f6: Electrical Compartment Temperature High
This fault is displayed when the temperature of the
electrical compartment exceeds 158ºF (70ºC), as
measured by the sensor on the control board. The
electrical compartment temperature is monitored
once per minute.
The fault is cleared from the display if on the next
check, the thermocouple temperature is below
158ºF (70ºC).