Hitachi J300U Series - Manual (Page 79)

9-6
1 2
Symptom Probable cause Countermeasure
The
motor
will not
run. The inverter
outputs
U(T1), V(T2)
and W(T3)
are not
supplying
voltage. • Is power being supplied to terminals
R(L1), S(L2) and T(L3)?
If it is, the POWER lamp should be on. • Check terminals R(L1), S(L2), T(L3), U(T1),
V(T2), and W(T3).
• Turn on the power supply.
• Is the display E ? • Press and check the content.
Then press the reset key.
• Is the operation instruction RUN ON?
• Is terminal FW (or REV) connected to
terminal CM1? • Set to ON.
• Connect terminal CM1 to terminal FW
(or REV) on the printed-circuit board.
(When the terminal mode is selected.)
• Has the frequency setter been turned on
by pushing key and then
key.
• Push down keys and set.
• When terminal mode is selected, connect the
potentiometer to H, O, and L, and then set.
• In the case of the internal interface power
source, short the terminals P24 and PLC or
CM1 and PLC.
• In the case of the external interface power
source, turn the PLC terminal on.
• Has RS/FRS been left ON?
• Contact FRS.
• Is the mode key setting correct? • Read the explanation of the function mode
once again. (Page 7-12) F9 frequency/run
commanding method
Inverter
outputs
U(T1), V(T2)
and W(T3)
are supplying
voltage.
• Are the printed-circuit board terminals
H, O and L connected to
the potentiometer?
• Are the terminals connected to the
external and internal interface power
source the terminal mode is selected?
1 2
• Has the motor seized or is the load too
great? • Release seizure or lighten the load.
• Test the motor independently.
The optional
remote
operator is
used.
(copy unit) • Are the remote operator and equipment
body switched coorrectly ?
• Is the setting of the DIP switch on the
back of the remote operator correct ? • Check the operation of the optional remote
operator. (copy unit)
ON
OFF
1 2 3 4
1: OFF
2: ON (Same as VWA, J100)
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 in respect to U(T1),
V(T2) and W(T3)? • Make the connections according to the phase
sequence of the motor. (In general, forward
should be in the sequence: U(T1), V(T2)
and W(T3).)
• Are the terminals on the printed-circuit
board correct? • Short the FW terminal for forward rotation or
the intelligent input terminal 8 (the intelligent
input terminal 8 is allocated to run command
REV by initialization at factory before
shipment) for reverse rotation to the CM1
terminal (Sink type).
FUNC
* *
• Release reset.
9.2 Trouble shooting