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
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 her value of the set frequency to the same of higher than that
of the starting or stop frequency (F23 of 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).
To Next Page
Loading...