Preparation For Practical Operation - Fuji Electric FRENIC-HVAC User 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, see Chapter 6
"FUNCTION CODES" and Chapter 9 "TROUBLESHOOTING."
Function code
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

5.7.11 Preparation for practical operation

After verifying normal motor running with the inverter in a test run, connect the motor with the
machinery and perform wiring for practical operation.
(1) Configure the application related function codes that operate the machinery.
(2) Check interfacing with the peripheral circuits. Turn the power ON and check that the reference
frequency 0.00 Hz is blinking on the LCD monitor.
1) Mock alarm
Generate a mock alarm by pressing the " +
and check the alarm sequence. The inverter should stop and issue an alarm output signal (for
any fault).
2) Judgment on the life of the DC link bus capacitor
When the multi-function keypad is used, it is necessary to set up the judgment reference
level to be applied for the judgment on the life of the DC link bus capacitor.
When the remote keypad is used, the same setting-up is also necessary in order to judge the
life of the DC link bus capacitor under the practical operating conditions.
For details, refer to Chapter 10.
3) I/O checking
Check interfacing with peripherals by checking I/O on (PRG) > 3 (INV Info) > 3 (I/O
Check) on the keypad in Programming mode. For details, refer to Chapter 5.
4) Analog input adjustment
Adjust the analog inputs on terminals [12], [C1] and [V2] using the function codes related to
the offset, filter and gain that minimize analog input errors. For details, refer to Chapter 6.
Name
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.
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.)
5-107
Modification key points
What to Check and Suggested Measures
keys" on the keypad for 5 seconds or more
5.7 Alarm Mode