Siemens SIMATIC IPC847D Operating Instructions Manual page 196

Technical support
A.2 Troubleshooting
Error displays on the front panel
Front LED
Red WATCHDOG LED is lit
Red TEMP LED is lit
Red FAN LED is lit
Red HDD0 ALARM LED is lit
Red HDD1 ALARM LED is lit
Red HDD2 ALARM LED is lit
HDD | HDD3 ALARM is lit in
red or flashes green
HDD0, HDD1, HDD2 ALARM
and HDD | HDD3 ALARM
flash red
HDD0, HDD1, HDD2 ALARM
and HDD | HDD3 ALARM is lit
in red
PN Ι MPI/DP lights up red
All front-panel LEDs are
constantly lit
Redundant power supply
Problem Possible cause
Device failure
•
despite redundant
•
power supply in
case of power
failure
196
Possible cause
Watchdog has triggered
Excess temperature in the device
Fan failure
RAID reports that hard disk 0 is
defective
RAID reports that hard disk 1 is
defective
RAID reports that hard disk 2 is
defective
RAID reports that hard disk 3 is
defective
RAID is in the "rebuild" state
RAID system is not ready for
operation:
A fault has occurred on the CPU
1616 onboard interface
Error in early BIOS-POST
One module is not switched on
Both modules are connected
so the same AC circuit
Details about the error display
See section "Watchdog (WD)"
See section "Temperature monitoring/display"
See section "Fan monitoring"
See section "Status displays"
See section "Status displays"
See section "Status displays"
See section "Status displays"
See section "Status displays"
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".
See section "Status displays"
Contact Technical Support.
Possible remedy
Switch on both modules
•
Connect modules to separate AC circuits
•
Operating Instructions, 01/2014, A5E32997454-AA
SIMATIC IPC847D