Hitachi L100 User Manual
Page 128
L100 Inverter
T
roub
les
hooti
n
g
and Mai
n
tena
nce
6–3
Troubleshooting Tips
The table below lists typical symptoms and the corresponding solution(s).
Symptom/condition
Probable Cause
Solution
The motor
will not run.
The inverter
outputs U, V, W
are not supply-
ing voltage.
•
Is the frequency command source
A01 parameter setting correct?
•
Is the Run command source A02
parameter setting correct?
•
Make sure the parameter
setting A01 is correct.
•
Make sure the parameter
setting A02 is correct.
•
Is power being supplied to termi-
nals L1, L2, and L3(N)? If so, the
POWER lamp should be on.
•
Check terminals L1, L2, and
L3(N), then U/T1, V/T2,
and W/T3.
•
Turn on the power supply or
check fuses.
•
Is there an error code
EXX
displayed?
•
Press the Func. key and
determine the error type.
Then clear the error (Reset).
•
Are the signals to the intelligent
input terminals correct?
•
Is the Run Command active?
•
Is the [FW] terminal (or [RV])
connected to P24 (via switch, etc.)
•
Verify the terminal functions
for C01 - C05 are correct.
•
Turn on Run Command.
•
Supply 24V to [FW] or [RV]
terminal, if configured.
•
Has the frequency setting for F01
been set greater than zero?
•
Are the control circuit terminals H,
O, and L connected to the potenti-
ometer?
•
Set the parameter for F01 to
a safe, non-zero value.
•
If the potentiometer is the
frequency setting source,
verify voltage at “O” > 0V.
•
Is the RS (reset) function or FRS
(free-run stop) function on?
•
Turn off the command(s).
Inverter outputs
U, V, W are
supplying
voltage.
•
Is the motor load too heavy?
•
Reduce load, and test the
motor independently.
The optional
remote operator
is used (DR/W)
•
Are the operational settings
between the remote operator and
the inverter unit correct?
•
Check switches 1 and 2 on
the optional remote operator
(copy unit).
The direction of the motor is
reversed.
•
Are the connections of output
terminals U/T1, V/T2, and W/T3
correct?
•
Is the phase sequence of the motor
forward or reverse with respect to
U/T1,V/T2, and W/T3?
•
Make connections according
to the phase sequence of the
motor. In general:
FWD = U-V-W, and
REV=U-W-V.
•
Are the control terminals [FW] and
[RV] wired correctly?
•
Is parameter F04 properly set?
•
Use terminal [FW] for
forward, and [RV] is reverse.
•
Set motor direction in F04.
2
1
4
3
ON
OFF
1: Off
2: On
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