WACKER Group IRFUN 38/115, Operator'S Manual

Page: 24 / 34

Repair instructions
T01036en.fm
24
There is a risk of injury should a condenser explode when voltage is
applied and, as a result thereof, potting compound is ejected. This is
why you should always wear eye protection and avoid the area right
above the condensers.
Before you apply voltage, always carry out a visual inspection of the
opened inverter. Condensers with bulged tops or ones that are higher
than the others are already damaged. You must not apply voltage to
this inverter!
If a red LED lights up when you turn on the machine, the machine has
shut down because of a detected error.
(*) - see Technical Data
For additional protection of the machine against excessive input volt-
age a metal-oxide varistor has been installed in the input circuit.
Malfunction Cause Remedy
Green LED is not lit.
Internal vibrator (IR)
not running. - Supply cable
interruption.
- Poor contact
transitions. - Check supply cable.
- Check contact transitions
(switches, connectors) and
rework if necessary.
Green and first red
LEDs illuminate.
IR not running. - Cable disruption
between frequency
converter (FU) and IR.
- Fault in the FU
electronics. - Check cables and replace if
faulty.
- Replace FU.
Green and second
red LEDs illuminate.
IR not running. - Ground contact in the
FU or IR. - Insulation measurements
at IR and FU, replace faulty
components.
Green and third red
LEDs illuminate.
IR not running. - Temperature in the FU
housing too high.
- IR runs sluggish. - Measure the current values
(*) in the output lines.
- Remove fault in the IR.
Green and fourth
red LEDs illuminate.
IR not running. - Short circuit between
FU and IR. - Locate the short circuit by
measurements and
remove.
Green and fifth red
LEDs illuminate.
IR not running. - Incorrect input voltage,
too high or too low. - Measure voltage at the
switch.
- Check generator.