Documents are only to be used and distributed completely and unchanged. It is strictly the users’ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 999155 / 29/01/2009
page 28 of 36
If the pump does not achieve the ultimate vacuum:
☞
In case the diaphragms and valves have been replaced, a run-in period of several
hours is required before the pump achieves its ultimate vacuum.
☞
In case of unusual noise switch off pump immediately and check clamping disc
positions
If the pump does not achieve the ultimate total vacuum:
Check hose connectors between pump heads and manifolds for leaks. If necessary
recheck pump chamber.
Replacing the device fuse
The pigtail fuses (slow blow fuse 6,3A) is built in in a wire (1,
black and blue) inside the terminal box. To replace the fuses
it is necessary to replace the whole wires (fixed with flat pin
bushes (2)).
➨
Open the terminal box. Unscrew the four screws with a
Torx screw driver TX20 and remove the terminal box cov-
er. Remove the wire with the blown fuse (fixed with flat
pin bushes (2), see figure). Mount the new wire (flat pin
bushes) and close the terminal box. Fasten the cover with
the four screws.
Order-no. Set of fuses NT
.........................................
636542
The replacing of the device fuse has to be carried out by an
electrician
. Switch off
the pump and disconnect it from mains before opening the terminal box. After dis-
connecting from mains wait two minutes to allow the capacitors to discharge. After
replacing the fuse, the pump must be checked for electric safety (see below)! Identify
and eliminate the cause of failure before switching on the pump again.
1
2
2
➨
Position the diaphragm pump carefully on the other side, support pump appropriately. Perform main-
tenance of the remaining pump heads according to the description above.
Important: Check operability and safety of the pump after repair and after
replacing the device fuse.
Check the electrical safety (protective conductor resistance, insulating resist
-
ance, high voltage test) according to IEC 61010 and national regulations.
