en-US
Main pump
States
EXT. OFF
1
Active
2
Not active
3
Active
4
Not active
Table 35: System mode
Single mode
The control input of the main pump and the control input of the partner pump are respectively occupied with
a control cable and configured to EXT. OFF. Each of the two pumps is individually switched by its own con-
trol input. If the main pump malfunctions or if the twin-head pump connection is disconnected, the control
input of the partner pump is assessed.
Alternatively, a cable jumper can also be put on the partner pump instead of a separate control cable.
Main pump
States
EXT. OFF
1
Active
2
Not active
3
Active
4
Not active
Table 36: Single mode
Combined mode
The control input of the main pump and the control input of the partner pump are respectively occupied with
a control cable and configured to EXT. OFF. The control input of the main pump switches both twin-head
pump partners off. The control input of the partner pump only switches the partner pump off. If the main
pump malfunctions or if the twin-head pump connection is disconnected, the control input of the partner
pump is assessed.
102
Behavior of
Display text
the pump mo-
for active in-
tor
fluences
Off
OFF
Override OFF
(DI1/2)
On
OK; normal op-
eration
Off
OFF
Override OFF
(DI1/2)
On
OK; normal op-
eration
Behavior of
Display text
the pump mo-
for active in-
tor
fluences
Off
OFF
Override OFF
(DI1/2)
On
OK; normal op-
eration
Off
OFF
Override OFF
(DI1/2)
On
OK; normal op-
eration
Installation and operating instructions • Wilo-Stratos MAXO/-D/-Z • Ed.02/2023-10
Partner pump
EXT. OFF
Behavior of
the pump mo-
tor
Active
Off
Active
On
Not active
Off
Not active
On
Partner pump
EXT. OFF
Behavior of
the pump mo-
tor
Active
Off
Active
Off
Not active
On
Not active
On
Display text
for active in-
fluences
OFF
Override OFF
(DI1/2)
OK; normal op-
eration
OFF
Override OFF
(DI1/2)
OK; normal op-
eration
Display text
for active in-
fluences
OFF
Override OFF
(DI1/2)
OFF
Override OFF
(DI1/2)
OK; normal op-
eration
OK; normal op-
eration