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4.4
Blower Motor Controller Defective Messages
4.4.1 Fault Codes
The SP500 controller requires only minor troubleshooting if a fault should occur. The
controller displays fault (ERR) codes which assist in troubleshooting if a fault should
occur. If a fault condition occurs while the drive is running, (LED 7 on), the drive will
coast to rest and a 2-digit fault code is flashed on the display.
The fault code is also entered into the error log. The error log is designated as "ERR"
on the display.
4.4.2 How to Access and Read the Error Log
Fault codes are entered into the error log in sequential order if more than 1 fault should
occur. The first error to occur will be flashed on the display and two more errors may
be logged into the error log. (The error log must be accessed to see them). After three
faults have occurred, no more subsequent faults will be entered into the error log.
The faults entered into the error log are numbered sequentially. If first an overcurrent
fault were to occur, it would be in the error log as "1=OC". If next a thermal overload
fault were to occur (and the first error was not yet cleared), it would be in the error log
as "2=OL", and so on.
The last fault to occur will appear first when accessing the error log. For example, if the
last fault was a low bus fault, and the error log has 3 entries, then the error log would
display "3=LU" when the error log is first accessed.
Faults are retentive to the error log if a power loss occurs. The entire error log can be
cleared by pressing the STOP/RESET button.
* To access the error log:
1. Enter MAINTenance mode on the oven. (Press MAINTenance, enter access code, then press
ENTER.)
2. Enter the Program Mode on the SP500 controller. (Press the MODE/ENTER key.)
3. If the display shows "F-00", use the down arrow key to move directly to "Err". Either the up or down
arrow key can be used to move through the function list.
4. Press the MODE/ENTER key. (If "ERR" is still displayed, no errors are stored in log.)
5. Press the up arrow key to move through the error codes.
6. Press the STOP/RESET key to clear faults. Refer to 4.4.3.
4.4.3 Messages in Error Log
OH: Thermostat / Drive Overload
Cause
The internal thermostat has caused a trip that indicates
excessive temperatures in the controller.
1.
The ambient temperature of the controller is exceeded.
TurboChef, Inc.
700-0655.DOC Rev B February 15, 1997
Action
Press the STOP/RESET button (or cycle oven power off for 30
seconds, then on.) The error will not clear until the internal drive
temperature is back within range. This may take a few seconds.
1.
Check Blower shaft to see if it freely turns.
2.
Check the Oven Air Filter and verify the Floor Fan is
operating (If the oven is hot).
motor/controller test.
Refer to the blower
Page 26 of 62
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