Trouble Shooting - Hitachi J300U Series Instruction Manual

9.2

Trouble shooting

Symptom
The The inverter
motor outputs
will not U(T1), V(T2)
run. and W(T3)
are not
supplying
voltage.
Inverter
outputs
U(T1), V(T2)
and W(T3)
are supplying
voltage.
The optional
remote
operator is
used.
(copy unit)
The
direction
of the
motor is
reversed.
Probable cause
• Is power being supplied to terminals
R(L1), S(L2) and T(L3)?
If it is, the POWER lamp should be on.
• Is the display E ?
* *
• Is the operation instruction RUN ON?
• Is terminal FW (or REV) connected to
terminal CM1?
• Has the frequency setter been turned on
by pushing key and then
FUNC
key.
2
1
• 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?
• Has RS/FRS been left ON?
• Is the mode key
• Has the motor seized or is the load too
great?
• Are the remote operator and equipment
body switched coorrectly ?
• Is the setting of the DIP switch on the
back of the remote operator correct ?
• 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)?
• Are the terminals on the printed-circuit
board correct?
• Check terminals R(L1), S(L2), T(L3), U(T1),
V(T2), and W(T3).
• Turn on the power supply.
• Press
Then press the reset key.
• Set to ON.
• Connect terminal CM1 to terminal FW
(or REV) on the printed-circuit board.
(When the terminal mode is selected.)
• 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.
• Release reset.
• Contact FRS.
setting correct? • Read the explanation of the function mode
once again. (Page 7-12) F9 frequency/run
commanding method
• Release seizure or lighten the load.
• Test the motor independently.
• Check the operation of the optional remote
operator. (copy unit)
ON
OFF
• 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).)
• 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).
9-6
Countermeasure
and check the content.
2
1
1 2 3 4
1: OFF
2: ON (Same as VWA, J100)