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4.2
Blower Motor Controller Tests
The blower motor operates during the normal idle operation (the speed is set by IAF in
Maintenance mode for stabilization of the oven temperatures), while in the cooking
mode at the desired speed, and during the MAINTenance mode. The MAINTenance
mode allows the service technician to manually operate the blower on and off and to
change the speed.
Note: The Blower Shaft rotates in the clockwise direction when viewed from
front of oven.
4.3
Blower Defective Messages
The TurboChef oven will display a defective (fail) message, "BMSC DEFECTIVE", if the
RUN status from the Blower Motor Speed Controller is absent during self-test or while
cooking.
In either case, they can be caused by the following problems:
SELF TEST
WHILE
COOKING
BMSC
BMSC
DEFECTIVE
DEFECTIVE
TurboChef, Inc.
CAUSE
Blower Motor Speed Controller
not returning the "Running" status.
(See indicator LED 7)
700-0655.DOC Rev B February 15, 1997
CORRECTIVE ACTION
1. Check BMSC Temperature. If
below 0°C, let controller warm up
and try again
2. Check Blower Fuses (See 12.0,
Pages 52-60).
3. Check Air Filter for cleanliness.
4. Check Cooling Fan operation.
5. Check for proper operation of
interlock/monitor switches.
6. Check fault message on BMSC.
(See 4.4.2, Page 26 or Reliance
Electric Manual.)
7. Check BMSC Settings. (See
4.5.2, Page 28.)
8. Check all connections in the
blower circuit (Ribbon cables, all
blue wire signal circuits).
9. Replace BMSC. (See 8.0, Page
45.)
10. Replace I/O CCA. (See 8.0, Page
45.)
11. Replace Blower Motor Assembly.
(See 4.1, Page 24.)
12. Replace Controller CCA. (See
8.3, Page 46.)
Page 25 of 62
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