System mode
The control input of the main pump is occupied with a control cable and configured to EXT. OFF.
The control input on the main pump switches both dual-pump partners.
The control input of the partner pump is ignored and has no significance regardless of its configuration. If the main pump malfunctions or if the twin-head pump connection is disconnected, the partner pump is also stopped.
Main pump | Partner pump | |||||
|---|---|---|---|---|---|---|
States | EXT. OFF | Behaviour of the pump motor | Display text for active influences | EXT. OFF | Behaviour of the pump motor | Display text for active influences |
1 | Active | Off | OFF | Active | Off | OFF |
2 | Not active | On | OK; normal operation | Active | On | OK; normal operation |
3 | Active | Off | OFF | Not active | Off | OFF |
4 | Not active | On | OK; normal operation | Not active | On | OK; normal operation |