En
gl
is
h (
G
B)
26
7.3 Service system
According to the motor runtime service requirements
will appear. Service requirements appear regardless
of the current operating state of the pump and do not
affect the dosing process. If no service requirement
has occurred, service has to be performed at least
every two years.
*
Since the last service system reset
Fig. 21
Service soon!
Fig. 22
Service now!
The service requirement signals when the
replacement of wearing parts is due and displays the
number of the service kit. Press the click wheel to
temporarily hide the service prompt.
When the "
Service now!
" message appears
(displayed daily), the pump must be serviced
immediately. The
symbol appears in the
"
Operation
" menu.
The number of the service kit required is also
displayed in the "
Info
" menu.
7.4 Perform service
Only spare parts and accessories from Grundfos
should be used for maintenance. The usage of
non-original spare parts and accessories renders
any liability for resulting damages null and void.
Further information about carrying out maintenance
can be found in the service kit catalog on our
homepage www.grundfos.com.
7.4.1 Dosing head overview
Fig. 23
Dosing head, exploded view
Service requirement
Motor runtime [h]*
Service soon!
7500
Service now!
8000
T
M
0
4
11
3
1
111
0
T
M
0
4
11
3
1
111
0
Caution
For media which result in increased wear,
the service interval must be shortened.
Service soon!
Please exchange
diaphragm and valves!
Service kit:
97xxxxxx
Service now!
Please exchange
diaphragm and valves!
Service kit:
97xxxxxx
Warning
Risk of chemical burns!
When dosing dangerous media, observe
the corresponding precautions in the
safety data sheets!
Wear protective clothing (gloves and
goggles) when working on the dosing
head, connections or lines!
Do not allow any chemicals to leak from
the pump. Collect and dispose of all
chemicals correctly!
Caution
Before any work to the pump, the pump
must be in the "Stop" operating state or be
disconnected from the power supply. The
system must be pressureless!
T
M
0
4
1
1
23
21
10
1
Safety diaphragm
2
Flange
3
O-ring
4
Diaphragm
5
Valve on discharge side
6
Valve on suction side
7
Dosing head
8
Screws with discs
9
Cover
10
Deaeration valve
11
Drain opening
1
2
3
5
7
8
4
6
10
9
11
