Hitachi SJ700-2 Series, Service Manual

Page: 32 / 81

2- 4
Name Description
Display on
digital operator
Display on remote
operator
Troubleshooting and corrective action
Option 2
error
The inverter detects errors in the option
board mounted in the optional slot 2.
For details, refer to the instruction
manual for the mounted option board. Check whether the option board is
mounted correctly.
(Check the board mounting.)
Check whether the option board is used
correctly.
(Check the instruction manual for the
option board.)
Waiting in
undervoltage
status
If the input voltage falls, the inverter will
shut off its output, display the code
shown on the right, and wait for the
recovery of the input voltage.
The inverter will display the same error
code also during an instantaneous
power failure.
(remark) Inverter trips with under
voltage when this status continues for
40 seconds. Check whether the power supply voltage
has fallen.
(Recover the power supply.)
Check the MCB and magnetic contactors
for poor contacts.
(Replace the MCB and magnetic
contactors.)
Check whether the voltage across the P
and N terminals is normal.
(Check the voltage across the P and N
terminals.)
Communica-
tion error
If a problem occurs in the
communication between the digital
operator and inverter, the inverter will
display the code shown on the right. Check whether the relay plug is fitted
correctly.
(Check the relay plug for connection.)
Check whether the digital operator is
connected correctly.
(Check the digital operator for connection.)
Waiting for
retry
When the retry after instantaneous
power failure or tripping has been
enabled, the inverter displays the code
shown on the right while awaiting retry
after an instantaneous power failure or
tripping.
Power-off
The inverter displays the code shown
on the right when the inverter power is
turned off.
Restricted
operation
command
When an operation direction has been
restricted by the setting of "b035", the
inverter will display the error code
shown on the right if the operation
command specifying the restricted
operation direction is input.
Empty trip
history
If the inverter has not tripped before,the
inverter displays .
？
to
OP2-0
OP2-9
UV.WAIT
R-ERROR COMM<1>
RESTART
ADJUST
POWER OFF
RUN.CMD DISABLE
R-ERROR COMM<2>