Chapter 5 Fault Diagnoses And Processing; Fault Types; Fault Information And Details - Veichi AC90 Manual

AC90 TENSION CONTROL FREQUENCY INVERTER MANUAL

Chapter 5 Fault Diagnoses and Processing

This chapter explains the display contant and process of the inverter fault, alarm and operation fault. It also simply
explains the bad situation caused by inverter or motor fault and how to solve it. For the adjustment guide in trial run,
please refer to this chapter too.

5.1 Fault types

Type
While inverter detect fault, the state likes this:
●
●
●
Equipment fault
●
●
External fault

5.2 Fault information and details

Keyboard Fault
display code
L.U.1
E.LU2
E.oU1
E.oU2
Keyboard display character showing fault content.
Inverter stops output. Motor free slide stops.
While function F2.22/F2.23 is set as 3(output fault), Y1/Y2 terminals output valid
open-collector digital output.
While function F2.24 is 3(fault output), TA-TC terminals output open passive digital
output.
While there is fault as OL, OC, SC, OV, UL2, if FA.15 is not 0, the inverter will restart
automatically after FA.16 setting time.
In certain application occasions, external related equipments fault signals are considered
in the inverter control system as usage of monitoring, protection or switch control. At this
time, if one multi function terminal is defied as "external fault", the inverter stops output
alarm signal.
Fault type
Power supply is too low
●
Too low while
Voltage detection circuit is
●
stop
abnormal
Power supply is too low
●
Power capacitance is too
●
small, or there is big
Too low
impact current in the
voltage in run
power grid.
Inner DC main contactor is
●
not closed.
Power voltage fluctuation
●
Acc
over limit.
over-voltage
Start running motor .
●
Deceleration time is too
●
short.
Dec Load potential energy or
●
over-voltage inertia is too large.
Power voltage fluctuation
●
over limit.
BASIC OPERATION AND TRIAL RUN
Inverter action while fault happens
Possible causes
50
Treatment
Check input power, eliminate
●
fault.
Seek support from factory.
●
Check input input power,
●
eliminate fault.
Improve power-supply system.
●
Seek support from factory.
●
Detect power voltage and
●
eliminate fault.
Restart motor until it totally
●
stop.Set F1.00 as 1or 2.
Prolong deceleration time
●
properly.
Reduce load inertia or improve
●
inverter capacitance or add
braking unit.
Detect input power and clear
●
fault.