ABB ACS800 Series Hardware Manual page 90

90
This table lists recommended actions in faults indicated by the IRDH275.
Display Cause
indication
No display The alarm relay is in the fault position and the
main contactor / breaker of the drive has opened.
Connection PE? Low-resistance conductor to earth is not
connected to terminals
System Low-resistance conductors from the IT system
connection are not connected to terminals L1, L2 or L3.
Device error x Internal device error
Note: If the on/off switching of the supply voltage is not possible for technical
reasons, a RESET of the process control can be carried out by pressing the ESC,
RESET and MENU keys simultaneously.
Earth fault monitoring in IT (ungrounded) systems (+Q954)
What to do
Check the auxiliary power supply of the IRDH275.
1. Check the wiring of terminals
and KE.
2. Press the TEST button.
3. Switch the supply voltage off and on.
1. Check the wiring of terminals L1 and L2 to the
2. Press the TEST button.
3. Switch the supply voltage off and on.
4. Check the fuses.
1. Press the TEST button.
2. Switch the supply voltage off and on.
3. Contact BENDER.
drive PE.
drive.
and KE to the