Technical support
A.2 Troubleshooting
SIMATIC IPC847D
196 Operating Instructions, 01/2014, A5E32997454-AA
Error displays on the front panel
Details about the error display
See section "Watchdog (WD)"
Excess temperature in the device
See section "Temperature monitoring/display"
See section "Fan monitoring"
Red HDD0 ALARM LED is lit RAID reports that hard disk 0 is
See section "Status displays"
Red HDD1 ALARM LED is lit RAID reports that hard disk 1 is
See section "Status displays"
Red HDD2 ALARM LED is lit RAID reports that hard disk 2 is
See section "Status displays"
HDD | HDD3 ALARM is lit in
RAID reports that hard disk 3 is
See section "Status displays"
HDD0, HDD1, HDD2 ALARM
and HDD | HDD3 ALARM
RAID is in the "rebuild" state See section "Status displays"
HDD0, HDD1, HDD2 ALARM
and HDD | HDD3 ALARM is lit
in red
RAID system is not ready for
operation:
Affected drive must be identified with the help of the
RAID software. See section "Expanding and
assigning parameters to the device", section "Drives"
and section "Managing RAID systems".
PN Ι MPI/DP lights up red A fault has occurred on the CPU
See section "Status displays"
All front-panel LEDs are
Error in early BIOS-POST Contact Technical Support.
Device failure
despite redundant
power supply in
case of power
• One module is not switched on
• Both modules are connected
so the same AC circuit
• Switch on both modules
• Connect modules to separate AC circuits