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TurboChef Technologies, Inc. C Series
8 - 9
Delta Blower Motor Controller Fault Codes & Troubleshooting
Fault
Name
Fault Descriptions Corrective Actions
ocA Over-current during acceleration:
1. Short-circuit at motor output.
2. Torque boost too high.
3. Acceleration time too short.
4. AC drive output capacity is too small.
1. Check for possible poor insulation at the
output line.
2. Decrease the torque boost setting in
Pr.7-02.
3. Increase the acceleration time.
4. Replace with the AC drive with one that
has a higher output capacity (next HP
size).
Ocd Over-current during deceleration:
1. Short-circuit at motor output.
2. Deceleration time too short.
3. AC drive output capacity is too small.
1. Check for possible poor insulation at the
output line.
2. Increase the deceleration time.
3. Replace with the AC drive with one
Ocn Over-current during steady state operation:
1. Short-circuit at motor output.
2. Sudden increase in motor loading.
3. AC drive output capacity is too small.
1. Check for possible poor insulation at the
output line.
2. Check for possible motor stall.
3. Replace with the AC drive with one that
has a higher output capacity (next HP
size).
EF The external memory IC can not be programmed 1. When the external terminal EF-GND is
closed, the output will be turned off.
(Under N.O E.F)
cFI Internal memory IC can not be programmed. 1. Switch off power supply.
2. Check whether the input voltage falls
within the rated AC drive input voltage.
3. Switch the AC drive back on.
cF2 Internal memory IC can no be read. 1. Check the connections between the
main control board and the power board
(internal to motor controller).
2. Reset drive to factory defaults
cF3 Drive's internal circuitry abnormal. 1. Switch off the power supply.
2. Check whether the input voltage falls
within the rated AC drive input voltage.
Switch on the AC drive.
HPF Hardware protection failure 1. Return to the factory. Replace
controller.
codE Software protection failure 1. Return to the factory. Replace
controller.
cFR Auto accel/decal failure 1. Do not use the function of auto
acceleration/deceleration.
GF Ground fault:
The AC drive output is abnormal. When the output terminal is
grounded (short circuit current is 50% more than the AC drive rated
current), the AC drive power module may be damaged. The short
circuit protection is provided for AC drive protection, not user
protection.
Ground fault:
1. Check whether the IGBT power module
is damaged.
2. Check for possible poor insulation at the
output line.
CEI Communication Error 1. Check the connections between the AC
drive and computer for loose wires.
2. Check if the communication protocol is
properly set.
bb External Base Block. AC drive output is turned off. 1. When the external input terminal (B.B)
is active, the AC drive output will be turned
off.
2. Disable this connection and the AC
drive will begin to work again.