Mechanical Manual Control - Burkert 8681 Operating Instructions Manual

Control Head Type 8681
ServiceMode/ManualControl
The activation of the manual control is signaled by an illuminated LED display in the fault color: "Blinking patterns":
50 ms ON, 450 ms OFF.
The "blinking pattern" 100 ms ON, 100 ms OFF (3x) in the fault color signals that the manual control function was
disabled by the PC service program - the magnetic manual control does not function in this case! (see Chapter
"17.2. Blinking pattern & fault signaling")
Procedure for activating & deactivating the manual control for valve location 2/A1:
→
Observe safety guidelines for the system prior to using the manual control!
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Activating the magnetic manual control:
Hold the manual control tool on the identification points the between the cable glands for three seconds
(see "Fig. 36"):
("blinking pattern" in fault color = 50 ms ON, 450 ms OFF – active manual control;
"blinking pattern" in fault color = 100 ms ON, 100 ms OFF (3x) – manual control function disabled by the
software).
→
Once the measure has been completed, deactivate the magnetic manual control:
Hold the manual control tool on the identification points the between the cable glands for another three
seconds (see "Fig. 36").
After a power failure the magnetic manual control is reset and the control head restarts in standard
operating mode, i.e. the signal of the higher-level control is accepted.
18.2.

Mechanical manual control

If additional manual controls are required for additional service purposes or in the event of a failure of the elec-
trical energy, it is possible for all voltage and communication designs to switch the connected process valve using
the mechanical manual control of the solenoid valves after opening the housing.
DANGER!
Danger of explosion in explosive atmosphere (only in the event of a fault as zone 2)!
• Opening the hood or the housing in an explosive atmosphere is only allowed in a not energized state!
Fig. 37: Mechanical manual control of the solenoid valves
When the service measures have been completed, reset all manual controls to "0" for control-led oper-
ation of the system!
Hand lever of the
mechanical manual
control:
Red lever:
left: 0
right: 1
English
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