WEG W21 - 5 - Solution of faults; 5.1 - Fault Types; 5.2 - Fault Information and Details

W21 Magnet Drive System
®
| 9
Quick Guide
5 - Solution of faults
This chapter explains the display content and measures of the inverter fault, alarm and operation fault. In addi-
tion, the poor condition caused by the inverter and motor failures and the corresponding processing measures
will be briefly described. Tuning Guide on trial use is also referred to in this chapter
.
5.1 - Fault Types
Type Inverter Action When Fault Happens
Equipment Fault
When inverter detects a fault, the following conditions would happen:
●
Keyboard display character showing fault content.
●
Inverter output stops. Motor free slide stops.
●
When function [F2.29] is 3(output fault), Y terminal outputs valid open-collector digital
output.
●
When function [F2.30\F2.31] is 3(fault output), TA1-TC1, TA2-TC2 terminals output
open passive digital output.
●
For faults like OL, OC, SC, OV, UL2, if [FA.22] is not 0, the inverter will restart auto-
matically after the time interval set by [FA.23].
External Fault
In certain application occasions, external related equipments fault signals are consi-
dered in the inverter control system as usage of monitoring, protection and switch con-
trol. At this time, if one multi function terminal is defined as “external fault”, and when
the external related equipments fault signals are effective, the inverter stops output and
give out alarm signal.
5.2 - Fault Information and Details
Keyboard
Display
Fault
Code
Fault Type Possible Causes Treatment Measures
L.U.1
Too low
when stop
●
Power supply is too
low
●
Voltage detection
circuit is abnormal
●
Check input power, eliminate fault.
●
Seek support from vendor.
E.LU2
Under
voltage in
run
●
Power supply is too
low
●
Power capacitance
is too small, or there
is enormous impact
current in the power
grid.
●
Inner DC main con-
tactor is not closed.
●
Check input power, eliminate fault.
●
Improve power-supply system.
●
Seek support from vendor.
E.oU1
Acc over-
voltage
●
Power voltage fluc-
tuation over limit.
●
Start motor when
running.
●
Detect power voltage and eliminate
fault.
●
Restart motor until it totally stop; Set
F1.00 to 1or 2.