Service Manual
12
01/2017
3.1
System startup fault
Fault description
The control system cannot start up successfully after power-on; the PPU normally shows a black screen with no display at
all.
Diagnostic steps
1.
Check the status LED on the PPU panel.
•
If the status LED is lit, power off the control system and check whether
you have inserted the CF card properly. Then power on again and
observe whether you have eliminated the fault.
•
If the status LED is off, check the power supply interface (X1) on the
back of the PPU for the following:
–
Whether the connection is loose
–
Whether the 24 V terminal matches the interface
–
Whether the 24 VDC power supply is available by measuring with a
multimeter
2.
Replacement and maintenance are necessary if the fault still exists after
the above operations, because probably the PPU is damaged.
3.2
PPU/HMI fault
Fault description
The HMI screen or the keys on the PPU are inactive.
Diagnostic steps
1.
Check whether the control system is in the crashed state. If yes, restart the control system and then check whether the
fault still exists.
2.
Replacement and maintenance are necessary if the fault still exists after the above operations, because probably the
PPU is damaged.
Summary of Contents for SINUMERIK 808D
Page 30: ...Service Manual 30 01 2017 Notes ...