Analysis Of Various Operating Problems That Do Not Trigger An Trip Message - Hitachi SJ100 SERIES Service Manual

3-2. Analysis of Various Operating Problems That Do Not Trigger an Trip
message.
Problem
The motor does not start
Rotation direction is
opposite
Motor does not increase
speed
The inverter cannot be
programmed
Unstable rotation of the
motor
Data is not changed
Cannot change data by
Copy Unit
Possible cause
Mode of frequency command [A01]
and/or Run command [A02] is not
proper
Incorrect power supply condition
Inverter is in trip mode
0 Hz of Multi-stage speed is given
FRS and/or RS is remaining
0 Hz command is given
Each phase to phase voltage does
not balance. (out of +-3%)
Load is too heavy
If you use DOP or DRW, DIP
switch selection of the operator is
incorrect.
Inverter Failure
Wiring of the motor cable is
incorrect (U, V, W)
Setting of [F04] is incorrect
Motor load is too heavy
(Overload limitation)
External frequency set (VR) is out
of order
Frequency limiter [A61] is set
Acceleration time is too short
Software lock is selected [b31]
While INV running
RS or FRS command is given
Multi stage speed command is
given
Loose connection of DOP/DRW
Inverter is in trip mode
Motor load is changing heavily
Source voltage is changing
Mechanical resonance
Forgot to press [STR] key
Turn main power off within 6
seconds after pressing [STR] key
Turn power off within 6 seconds
after started copying
Remedy
Check each mode again
Check that the power supply is
within its specification
Get rid of the trip cause
Make FRS and RS invalid
Replace the unit
Decrease the load or use bigger
capacity of inverter and motor
Set as follows
ON
OFF
Same as J300, J100,L100
Replace the unit
Check the wiring of the motor
cable
Check the setting
Remove or decrease the motor
load
replace VR
Eliminate frequency limiter
Set longer acceleration time
Make software lock invalid
Stop the INV
Make them invalid
Make inverter in stop mode
Connect DOP/DRW properly
Reset the inverter
Reduce the motor load changing
or use bigger capacity of inverter
and motor
Reduce the changing
Change output frequency
Press [STR] key after changing
data
Make sure to wait at least 6
seconds after [STR] key is pressed
Make sure to wait at least 6
seconds
3-7
1 2 3 4