B&C Technologies SA Series Industrial - Manual (Page 63)

TROUBLE SHOOTING
7-3
If no alarm code appears on the LED monitor
Motor is running abnormally
1. The motor does not rotate.
Possible Causes What to Check and Suggested Measures
1. No power supplied to the
inverter.
Check the input voltage, output voltage and inter phase voltage
unbalance.
→ Turn on a molded case circuit breaker, an earth leakage circuit
breaker (with the exception of those exclusively designed for
protection from ground faults) or a magnetic contactor.
→ Check for voltage drop, phase loss, poor connections, or poor
contacts, and fix them if necessary.
2. No forward / reverse
operation command was
inputted, or both the
commands were inputted
simultaneously (external
signal operation).
Check the input status of the forward / reverse command with
Menu #4 “I/O checking” using the keypad.
→ Input a run command.
→ Set either the forward or reverse operation command to off if
both commands are being inputted.
→ Correct the assignment of commands (FWD) and (REV) to
function codes E98 and E99.
→ Connect the external circuit wires to control circuit terminals
(FWD) and (REV) correctly.
3. No indication of rotation
direction (keypad
operation).
Check the input status of the forward/reverse rotation direction
command with Menu #4 “I/O Checking” using the keypad.
→ Input the rotation direction (F02=0), or select the keypad
operation with which the rotation direction is fixed (F02=2 or
3)
4. The inverter could not
accept any run commands
from the keypad since it
was not in running mode. Check which operation mode the inverter is in, using the keypad.
→ Shift the operation mode to Running mode.
5. A run command with
higher priority than the
one attempted was active
and the run command was
stopped.
While referring to the block diagram of the drive command
generator
* check the higher priority run command with Menu #2
“Data checking” and Menu #4 “I/O checking” using the keypad.
* Refer to the FRENIC – Mini User’s Manual (MEH446).
→ Correct any incorrect function code data settings (e.g., cancel
the higher priority run command).
6. The set frequency was set
to the same or lower than
the value of the starting or
stop frequency.
Check that a frequency command has been entered, with Menu #4
“I/O checking” using the keypad.
→ Set the value of the set frequency to the same of higher than
that of the starting or stop frequency (F23 or F25).
→ Reconsider the starting and stop frequencies (F23 and F25),
and if necessary, change them to lower values.
→ Inspect the frequency command devices, signal converters,
switches or relay contacts. Replace any ones that are faulty.
→ Connect the external circuit wires correctly to terminals (13),
(12), (11) and (C1).