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Troubleshooting
9 Troubleshooting
This chapter explains how to troubleshoot a problem when inverter protective functions, fault
trips, warning signals, or faults occur. If the inverter does not work normally after following the
suggested troubleshooting steps, please contact the LSIS customer service center.
9.1 Trip and Warning
When the inverter detects a fault, it stops the operation (trips) or sends out a warning signal. When
a trip or warning occurs, the keypad displays the information briefly. Detailed information is
shown on the LCD display. Users can read the warning message at PRT-90. When more than 2 trips
occur at roughly the same time, the keypad displays the higher priority fault information. In the
keypad, fault trips with higher priority are displayed first. Use the [Up], [Down], [Left] or [Right]
cursor key on the keypad to view the fault trip information. The fault conditions can be
categorized as follows
•
Level: When the fault is corrected, the trip or warning signal disappears and the fault is not
saved in the fault history.
•
Latch: When the fault is corrected and a reset input signal is provided, the trip or warning
signal disappears.
•
Fatal: When the fault is corrected, the fault trip or warning signal disappears only after the
user turns off the inverter, waits until the charge indicator light goes off, and turns the inverter
on again. If the inverter is still in a fault condition after powering it on again, please contact
the supplier or the LSIS customer service center.
9.1.1 Fault Trips
Protection Functions for Output Current and Input Voltage
LCD Display Type Description
Over Load Latch
Displayed when the motor overload trip is activated and the actual
load level exceeds the set level. Operates when PRT-20 is set to a
value other than ‘0’.