AC90 TENSION CONTROL FREQUENCY INVERTER MANUAL BASIC OPERATION AND TRIAL RUN
50
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
Inverter action while fault happens
Equipment fault
While inverter detect fault, the state likes this:
●
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.
External fault
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.
5.2 Fault information and details
Keyboard
display
Fault
code
Fault type
Possible causes
Treatment
L.U.1
Too low while
stop
●
Power supply is too low
●
Voltage detection circuit is
abnormal
●
Check input power, eliminate
fault.
●
Seek support from factory.
E.LU2
Too low
voltage in run
●
Power supply is too low
●
Power capacitance is too
small, or there is big
impact current in the
power grid.
●
Inner DC main contactor is
not closed.
●
Check input input power,
eliminate fault.
●
Improve power-supply system.
●
Seek support from factory.
E.oU1
Acc
over-voltage
●
Power voltage fluctuation
over limit.
●
Start running motor .
●
Detect power voltage and
eliminate fault.
●
Restart motor until it totally
stop.Set F1.00 as 1or 2.
E.oU2
Dec
over-voltage
●
Deceleration time is too
short.
●
Load potential energy or
inertia is too large.
●
Power voltage fluctuation
over limit.
●
Prolong deceleration time
properly.
●
Reduce load inertia or improve
inverter capacitance or add
braking unit.
●
Detect input power and clear
fault.
