Maeda MK0003, Service Manual, Page: 314 / 348

5-20
Symptom Content of the likely cause Countermeasures
Reference
The motor does
not operate when
the run command
is issued. The wirings of the analogue input or
variable resistor of the frequency
command is wrong. Correct the wirings.
• Measure the voltage between FV to SC terminal
with a tester and check that the correct voltage
is flowing if using the analogue voltage or
variable resistor input.
• Disconnect the wirings and measure the current
between current source to FI terminal with a
tester and check that the correct current is
flowing if using the analogue current input.
“51: F-TM (force terminal block)” is
assigned to the multi function input
terminal to run with the operator, and it
is in ON state. Turn OFF the assigned terminal.
“31: OPE (force operator function)” is
assigned to the multi function input
terminal to run with the control circuit
terminal block, and it is in ON state. Turn OFF the assigned terminal.
The inverter is tripped. (ALARM LED
lights up, and “Exxx” is displayed) Press the STOP/RESET key to release the trip
(reset), and find the cause and perform
countermeasures from the alarm code, and then
restart.
Safety function switching switch is ON,
and either the multi function input
terminal S3/GS1, or S4/GS2 is OFF. Turn both of the safety input GS1 and GS2 if using
the safety function. Turn the switching switch OFF if
not used.
“18: RS (reset)”, “14: CS (commercial
switch)”, “11: FRS (freelance top)” is
assigned to the multi function input
terminal, and it is in ON state. Turn OFF the corresponding terminal.
“84: ROK (run OK signal)” is assigned
to the multi function input terminal, and
it is in OFF state. Turn ON the assigned terminal.
There is a breakage in the wiring from
the inverter to the motor, and the
wirings within the motor. Check the wirings.
Excessive load. Reduce the load.
The motor is being restrained. Release the restrain.
The rotational
speed of the motor
does not increase. Poor contact in the analogue input or
variable resistor of the frequency
command. Check the wirings.
• Measure the voltage between FV to SC terminal
with a tester and check that the correct voltage
is flowing if using the analogue voltage or
variable resistor input.
• Disconnect the wirings and measure the current
between voltage source to FI terminal with a
tester and check that the correct current is
flowing if using the analogue current input.
The overload restriction or the
overcurrent restriction function is
operating. Disable the function, or raise the operation level.
The primary maximum frequency
(A004) and frequency maximum limit
(A061/A261) settings are low. Change the settings.
Acceleration time is long Shorten the acceleration time
(F002/F202/A092/A292).
“06: JG (jogging)” is assigned to the
multi function input terminal, and it is in
ON state. Turn OFF the assigned terminal.
“02: CF1” to “05: CF4” are assigned to
the multi function input terminal, and is
in ON state. Turn OFF the multi step speed setting. (If the multi
step speed setting is ON, it will run in multi step
speed operation, so it will run according to the
frequency set in the multi step speed command 1 to
15 (A021 to A035).)
Excessive load. Reduce the load.
The motor is being restrained. Release the restrain.