B&C Technologies SA Series Industrial - Manual (Page 65)

TROUBLE SHOOTING
7-5
Possible Causes What to Check and Suggested Measures
4. A frequency command
with higher priority than
the one attempted (e.g.
multistep frequency,
communications or
jogging operation, etc.)
was active and the set
frequency was set to too
low a value.
Check the higher priority run command with Menu #2 “Data
checking” and Menu #4 “I/O checking” using the keypad, referring
to the block diagram of the drive command generator.
* Refer to the FRENIC – Mini User’s Manual (MEH446).
→ Correct any incorrect function code data settings (e.g., cancel
the higher priority run command, etc).
5. The acceleration /
deceleration time was too
long.
Check the data of function code F07, F08, E10, E11 and H54.
→ Change the acceleration / deceleration time to match the load.
6. Overload
Measure the output current.
→ Lighten the load (e.g., operate the mechanical brake correctly).
7. The current limiting
operation did not increase
the output frequency.
Check whether current limiting is active or not with Menu #3
“Drive monitoring” and check the current limiting level (F44)
using the keypad.
→ Change the level of the current limiting (F44) to an appropriate
value.
Decrease the value of torque boost (F09), then turn the power off
and back on again and check if the speed increases.
→ Adjust the value of the torque boost (F09).
Check the data of function codes F04, F05, H50, and H51 to ensure
that the V/f pattern is right.
→ Match the V/f pattern values with the motor ratings.
8. Bias and grain set
incorrectly.
Check the data of function codes F18, C50, C32, C34, C37 and
C39
→ Change the bias and gain to correct values.
3. The motor runs in the opposite direction to the command.
Possible Causes What to Check and Suggested Measures
1. Wiring had been
connected to the motor
incorrectly
Check the wiring to the motor.
→ Connect terminals U, V, and W of the inverter to the
respective U, V, and W terminals of the motor.
2. Incorrect connection and
settings for run commands
and rotation direction
command (FWD) and
(REV) Check the data of function codes E98 and E99 and the connection
to terminals (FWD) and (REV).
→ Correct the data of the function codes and the connection.
3. The setting for the rotation
direction via keypad
operation is incorrect.
Check the data of function code F02.
→ Change the data of function code F02 to 2 (forward rotation)
or 3 (reverse rotation).