Gardena 4000/4 Operating Instructions Manual page 9

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Red Power LED is lit
The pump is connected to the mains power.
The pump functions in the normal operating mode.
Green LED is lit
The pump is connected to the mains and the pump is running.
Once the pump has reached the max. pump pressure, the pump
switches off (the green LED extinguishes) and the pump functions
in the normal operating mode.
Green LED flashing slowly (once a second)
The flow rate on the delivery side is too low (below 90 l / h).
.
The pump continues to run and then switches off. It turns on
again as soon as the switching pressure of approx. 2.2 bar
has been reached (e.g. in the case of a leak).
The pump must be switched off just before you finish draining
.
water from the unit.
Green LED flashing quickly (four times a second)
The flow rate on the inlet side is too low (below 400 l / h).
.
The pump continues to run for approx. 40 seconds. If normal
operation is not achieved during this time, the pump switches
off and the control unit changes to the "automatic self-priming
mode".
Note: The pump can be switched on again at any time
by pressing the RESET button.
Yellow LED flashing slowly (once a second)
The amount of water is too low when restarting the pump.
.
The pump runs through the first "priming cycle". If the normal
operating mode is not achieved, the pump switches off and the
control unit changes to the "auto-matic self-priming mode".
Note: The pump can be restarted at any time by pressing the
RESET button.
Yellow LED flashing quickly (four times a second)
Alarm which indicates if the amount of water is too low when
.
the pump is operating in the normal mode. The control unit
changes to the "automatic self-priming mode".
Note: The pump can be restarted at any time by pressing the
RESET button.