Preparation For Practical Operation - Fuji Electric FRENIC-HVAC Manual

< Modification of motor control function code data >
Modifying the current function code data sometimes can solve an insufficient torque or overcurrent incident. The
table below lists the major function codes to be accessed. For details, refer to the FRENIC- HVAC User's Manual,
Chapter 6 "FUNCTION CODES" or Chapter 9 "TROUBLESHOOTING"
Function code Name
F07 Acceleration Time 1
F08 Deceleration Time 1
F09 Torque Boost 1
< Remedy to be taken if an alarm ECF (Enable circuit failure) occurs >
Possible Causes
(1) Poor connection of interface PCB
(2) Enable circuit logic error
(3) Enable circuit (safety circuit) failure
detected

4.5 Preparation for Practical Operation

After verifying normal motor running with the inverter in a test run, proceed to the practical operation.
For details, refer to the FRENIC-HVAC User's Manual.
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Modification key points
If the current limiter is activated due to a short acceleration time and large
drive current, prolong the acceleration time.
If an overvoltage trip occurs due to a short deceleration time, prolong the
deceleration time.
If the starting motor torque is deficient, increase the torque boost. If the motor
with no load is overexcited, decrease the torque boost.
What to Check and Suggested Measures
Check that the interface printed circuit board (PCB) is firmly connected to
the inverter unit.
Restarting the inverter releases the alarm.
Check that the logic values of the output of safety switches match with
each other (EN1/EN2 = High/High or Low/Low).
Restarting the inverter releases the alarm.
If this error persists after the above procedures have been taken, the
inverter is defective.
Consult your Fuji Electric representative. (The alarm cannot be released.)
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