Wilo Control MS-L, Installation And Operating Instructions Manual

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Installation and operating instructions • Wilo-Control MS-L • Ed.02/2022-05 27
7.1.2 Buttons
Function Buttons Description
MS-L1... MS-L2...
Manual mode Pressing the button switches the respective pump on independent of the level
control. The pump operates as long as the button is held down. This function is in-
tended for test mode.
Automatic mode Press the button to switch on automatic mode. The pumps are switched on and
off independent of the level control.
Stop Press the button to switch off automatic mode. The pumps are not controlled de-
pendent on the level. The switchgear is in standby mode.
Buzzer off/reset Press the button to switch the integrated buzzer off and deactivate the collective
fault signal (SSM).
Press the button for more than 1 s to acknowledge a fault. This releases the con-
trol again.
7.1.3 LEDs Control MS-L2... : Pump-dependent LEDs are displayed in two rows using the symbols:
• Top row: current status of pump 1
• Bottom row: current status of pump 2
Display LED LED colour Description
MS-L1... MS-L2...
Mains connection Green LED lights up : Mains voltage and control voltage are on.
Automatic mode Green
LED flashes : Switchgear switched on − standby mode
LED lights up : Automatic mode switched on
LED off : Pump deactivated (only Control MS-L2...)
Pump operation Green LED flashes : Pump running during the set follow-up time.
LED lights up : Pump is running.
Service interval/operating
parameters − Yellow LED lights up : Service interval has elapsed.
LED flashes : Operating parameters exceeded.
High water alarm Red LED lights up : High water alarm activated
“Motor current monitoring”
fault Red LED flashes : Switchgear is operated without any load.
LED lights up : Set rated current exceeded
“Thermal motor monitoring”
fault Red LED lights up : Temperature sensor in motor triggered
7.1.4 Key lock Activate the key lock to prevent inadvertent or unauthorised activation of buttons:
Description Buttons
MS-L1... MS-L2...
Switch the key lock on and off by pressing the following but-
tons at the same time (for approx. 1 s): manual mode (pump 1),
stop and automatic mode.
All LEDs light up for approx. 2 s by way of confirmation.
Observe the following points:
• If a button is pressed when the key lock is active, all LEDs light up for 2 sec.
• The buzzer can be switched off and the collective fault signal (SSM) deactivated when
the key lock is active.
• Acknowledgement of error messages is not possible!