2. Voltage check (V
L
and V
I
)
(• = LED lights up, o = LED out)
LEDs Operating status Error treatment
oV
L
oV
I
Operating voltage for electronic
components not applied (pin 1)
Check operating voltage
connection
• V
L
• VI
Operating status normal or,
operating status normal but
valves do not switch.
Possible causes:
• Operating voltage of outputs
(pin 2) not in tolerance range or
not applied.
• Compressed air supply not
correct
• Pilot exhaust blocked
or
Operating status normal but
INTERBUS error message of
LEDs RC, BA, RD
None
Check the ...
• Operating voltage and/or
connection of outputs;
(pin 2) (tolerance range
DC 21.6V ... 26.4V)
• Compressed air supply
• Pilot exhaust channels
See error messages
LEDs, RC, BA, RD
• V
L
o V
I
or
o V
L
• V
I
Hardware error Service case
Fig. 5/3b: Part 2 – LED error messages
VIFB6 - 03/05 5. Diagnosis/Error Treatment
5-6
9809c
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