5
Fault treatment
5.1 Communication error
When there is communication error between the controller and the variable speed driver, an
error code “ER….” will be displayed.
5.2 Error Display
When the Controller is not working, a fault code will be shown on the controller display, E.g. “ER:
OV”.
Press “Start/Stop” button will restore the controller.
Below the common fault code list:
9
Error
Description
Reason
OC
Over Current:
the threshold (200% of rated current)
Driver's output current exceeds
Driver output failure
Driver IPM module is damaged
OV
Over Voltage:
exceeds the threshold
Main circuit DC voltage
Over power of the power supply
Power supply voltage exceeds controller setting
UV
The main electric current is too low
Voltage:
Under
Power supply disconnected, driver discharging
Supply voltage fluctuation it too large
OH
Motor heat sink overheatingOver Heat:
Ambient temperature is too high
Motor Cooling Fan does not work
(Chart 5.1)
After starting, the driver will run the self-checking procedure by scanning the display and the
operation light, as diagram 6.1.
When there is communication error between controller and the variable speed driver,
communication error will be displayed, as diagram 6.2.
6
Operating Procedure
6.1 Starting
content flash, short press “Mode” again, reset complete. Short press “Speed 3” while the content
is flashing to stop the reset.
(Diagram 6.1, Self-checking procedure)