Valves
There is a yellow LED for each valve solenoid
coil on the valve bridges. This LED shows the
switching status of the valve solenoid coil.
LED Switching position of
valve solenoid coil
Meaning
Yellow out Basic position Logic 0 (no signal)
Yellow alight • Switch position
or
• basic position
Logic 1 (signal applied)
Logic 1 but:
• Operating voltage of outputs is
below permitted tolerance range
(< 21.6V)
or
• compressed air supply not correct
or
• pilot exhaust blocked
or
• Service case
Fig. 5/4: LED display – switching status of solenoid valve coil
VIFB13 - 03/05 5. Diagnosis/error treatment
5-6
9701 NH
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