RD 500 RD42
Fault display and fault diagnostics
5-3
DOK-RD500*-RD42*******-IB03-EN-P
5.6
Fault display on the regenerative feedback control
NR16236
If the unit is shutdown due to a fault, there is a panel with 9 LEDs on the
NR16236 regenerative feedback control (also refer to the terminal layout
diagram) - information on the fault cause. With the exception of LEDs
H1.1 and H1.2, the other LED displays are only updated if there is an ON
command or a fault. If you wish to identify the cause of the fault, then a
new ON command may only be issued, if the fault display was evaluated.
After the supply voltage has been connected for the first time, displays
can be random which have no relevance. All of the LEDs are updated
after the ON command was issued.
3 green LEDs
3 green LEDs
3 red LEDs
1
3
2
H2
H1
H3
Fig. 5-3: LEDs
LED
Significance
Explanation
H1.1
Power section enabled
The IGBT power transistors have been
enabled; for fast line supply
fluctuations or for overcurrent
conditions, the LED briefly goes dark,
as the power section briefly inhibits
itself.
H1.2
Operating mode
If the LED is lit, then the standby mode
is active.
H1.3
Line supply OK
If the LED is no longer bright after a
fault trip, then the line supply voltage
was the cause due to
overvoltage/undervoltage.
H2.1
Main contactor ON
If the LED is dark after a fault trip, then
the fault is in the main contactor.
H2.2
n. c.
H2.3
V
DC link
OK
If the LED is dark after a fault trip, then
the DC link voltage was the cause due
to overvoltage/undervoltage.
H3.1
General fault
Displays a general fault trip
H3.2
Power section fault
The fault trip was due to a power
section fault
H3.3
Overload
The fault trip was due to an overload
fault
Fig. 5-4: Explanation of the various LEDs
