OJ Electronics OJ-DV Series User Manual

© 2016 OJ Electronics A/S
26
INSTRUCTIONS OJ-DV | Maintenance and troubleshooting
Symptom Cause Action
OJ-DV cuts out due
to an alarm
At least one alarm active Use OJ-DV Hterm to view the alarm and determine which alarm has
stopped the controller/motor.
Reset the alarm by short-circuiting the ”Alarm reset” input – digital
input Din1 or Din2 depending on the setup.
The alarm can also be reset by disconnecting the power supply to
the OJ-DV and reconnecting it after approx. 60 seconds.
The alarm is re-activated after reset Use OJ-DV PCTool to view the alarm and determine which alarm has
stopped the controller/motor.
Remedy the cause of repeated alarm activation.
23.4. Troubleshooting when OJ-DV is controlled via Modbus:
Symptom Cause Action
Motor inoperative Lacking supply voltage Check the voltage supply to OJ-DV terminals ”L” and ”N” on 230V
models (H1) or terminals ”L1”, ”L2” and ”L3” on 3x400V and 3x230V
models (H3…H5).
(Nominal supply voltage is stated on the rating plate.)
Check whether short-circuit protection has been activated.
Check that the voltage supply to OJ-DV has not been cut o by
other components.
Poor electrical connections Check electrical connections.
Wrong motor for OJ-DV setup Check that the correct motor settings have been read into and stored
in the OJ-DV setup.
Lacking operating signal Check that OJ-DV can receive an operating signal.
Coil Stat Bits Register 0X0001: Motor start/stop (1=On).
Lacking % control signal from Mod-
bus controller
Check the Modbus control signal at Modbus address: Holding regis-
ters; Register 3X0001: PrcSet 0-10000 (0-100%).
The motor has been stopped 5
times by the built-in motor protector
because of overloading
Reset alarm: Coil Stat Bits Register 0X0002: Reset (1 pulse = Reset).
The alarm can also be reset by disconnecting the power supply to
the OJ-DV and reconnecting it after approx. 60 seconds.
Defective OJ-DV controller Replace OJ-DV.
Never attempt to repair a defective OJ-DV controller.
Contact your supplier for replacement/repair.
Defective motor Replace motor.
Motor running in
wrong direction
Wrong phase sequence in motor ca-
ble
Interchange two phase wires on the motor or the OJ-DV terminal strip.
OJ-DV noisier than
acceptable
Switching frequency too low Increase switching frequency.
0 = Auto
1 = Low = 4 kHz
2 = High = 8 kHz
Increasing switching frequency increases losses within OJ-DV, thus
reducing eciency.
OJ-DV switching frequency can be changed via OJ-DV Hterm or via
Modbus.
OJ-DV cuts out due
to an alarm
At least one alarm active Use OJ-DV Hterm to view the alarm and determine which alarm has
stopped the controller/motor.
Reset the alarm by short-circuiting the ”Alarm reset” input – digital
input Din1 or Din2 depending on the setup.
The alarm can also be reset by disconnecting the power supply to
the OJ-DV and reconnecting it after approx. 60 seconds.
The alarm is re-activated after reset Read out the alarm via Modbus registers and determine which alarm
has stopped the controller/motor.
Remedy the cause of repeated alarm activation.

OJ Electronics OJ-DV Series Specifications

General

Brand	OJ Electronics
Model	OJ-DV Series
Category	Controller
Language	English