Maeda MK0003, Service Manual, Page: 313 / 348

5-19
2.7 TROUBLESHOOTING
Refer to the following countermeasures if the inverter does not display any faults regardless of the operation being
faulty, or if the inverter does not operate as intended.
Refer to “Alarm Display and Countermeasures” if the inverter outputs a fault display and trips.
Symptom Content of the likely cause Countermeasures
Reference
The power does
not turn ON (The
POWER LED on
the main unit does
not light up) Short circuit line b1, P/+2
terminal or the DC reactor is
disconnected. Connect the short circuit line or the DC reactor.
Breakage in the input line. Check the wirings.
The motor does
not operate when
the run command
is issued. The primary run command selection
(A002) is incorrect. Set the primary run command selection (A002)
properly.
The primary frequency command
selection (A001) is incorrect. Properly set the primary frequency command
selection (A001) according to the input method of
the frequency command, and set the frequency.
The frequency setting is 0 Hz. Input the analogue voltage or current signal
corresponding to the frequency to the FV terminal
or FI terminal if the primary frequency command
selection (A001) is “01: control circuit terminal
block”. Refer to “Frequency Command Selection”
for the details on analogue voltage/current switch.
Set the frequency to the output frequency
setting/monitor (F001) if the primary frequency
command selection (A001) is “02: operator”.
Input the frequency according to the setting value of
the primary frequency command selection (A001)
(the frequency entered appears on F001).
Set the frequency on multi step speed command 0
to 15 (A020 to A035, A220) if in multi step speed
operation.
Not assigned to the multi function input
terminal (run command). If performing the run command with the multi
function input terminal, appoint “00: FW”, “01: RV”
to the terminal to be used.
If performing the run command with the 3 wire input
method, appoint “20: STA”, “21: STP”, “22: F/R”.
Multi step speed setting “02: CF1” to
“05: CF4” is 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 if the frequency set in multi
step speed command 1 to 15 (A021 to A035) is 0
(default value), it will not run.
Both the non-inverting input and
inverting input is ON. Turn either but not both, when performing the run
command with the input terminal of
non-inverting/inverting input.
Run direction restriction selection
(b035) is set, and non-inverting or
inverting is prohibited. Properly set the run direction restriction selection
(b035).
The connection position of the wirings,
or the short circuit line of the input
terminal of the run command is wrong. Correct the wirings. (the ON/OFF state of the input
terminal can be checked on the multi function input
monitor (d005).)