Burkert 8681, Руководство по эксплуатации, Страница: 152 / 166

152
Service Mode / Manual override
The activation of the manual override or errors when using the manual override are signaled by device
status LED / Top LED in the fault colour - see chapter “21.2 Flashing pattern & fault signalling” on page 143
or “Table 15” on page 146
Procedure for activating & deactivating the manual override for valve location 2/A1:
→
Observe safety guidelines for the system prior to using the manual override!
→
Activating the magnetic manual override (only possible in Automatic mode):
Hold the magnetic manual override tool on the identification points between the cable glands for three
seconds (see “Fig. 49”), feedback for activation by device status LED / Top LED (“Table 15”)
→
Once the measure has been completed, deactivate the magnetic manual override:
Hold the manual override tool on the identification points between the cable glands for another three
seconds (see “Fig. 49”).
After a power failure, the magnetic manual override is reset and the control head restarts in normal
operating mode, i.e. the signal from the higher-level control is accepted.
22.2 Mechanical manual override
If additional manual overrides are required for additional service purposes or in the event of a failure of the
electrical energy, it is possible for all voltage and communication designs to switch the connected process
valve using the mechanical manual override of the respective solenoid valves V1 to V3 after opening the
housing.
DANGER!
Danger of explosion in a potentially explosive atmosphere (only in the event of a fault as zone 2)!
`
Opening the hood or the housing in a potentially explosive atmosphere is only allowed in a not ener-
gised state!
red hand lever of the
mechanical manual
override:
Hand lever position:
left: 0
right: 1
Fig. 50: Mechanical manual override of the solenoid valves
When the service measures have been completed, reset all manual overrides to "0" for controlled
operation of the system!
english
Control Head Type 8681