Commissioning; Maintenance; Faults, Causes And Remedies; Fault Indication And Acknowledgement At The Control Device - Wilo -VR-System Installation And Operating Instructions Manual

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6 Commissioning

We recommend that you have the system com-
missioned by Wilo customer service.
Before switching it on for the first time, the onsite
wiring must be checked, in particular the earthing
and potential equalisation.
Before initial commissioning, the pumps and the
pipe system must be flushed completely, filled
and bled, if necessary.
DANGER! Risk of fatal injury!
Tighten all connection terminals prior to com-
missioning!
Indication
Mains On/Off LED
Low water LED
Overpressure LED
Pump green LED
Pump red LED
LC display
LC display
LC display
LC display symbol
LC display
"Key" symbol
26
Reaction
Is not on
Is on,
At least one pump is running
Is on,
Pumps off
Flashing
Is on
Flashing
Is on
Is on
"O F F" indicator flashing with cur-
rent system pressure
"S F" indicator
"E r r" indicator
Is on
Flashing
Is on

7 Maintenance

DANGER! Risk of fatal injury!
Before all maintenance and repair work, discon-
nect the system from the power supply and
secure it so that it cannot be switched on by
unauthorised persons.
We recommend that you conclude a maintenance
agreement to guarantee the highest operational
reliability at the lowest possible operating costs.

8 Faults, causes and remedies

8.1 Fault indication and acknowledgement at the
control device
Cause and remedy
Check position of main switch.
Check the power supply for the electronic modules, the mains
voltage and the fuses
Low-water signal is applied; however, period of time below
the delay time T1
Low-water signal active, pumps stopped once the delay time
T1 passed.
Low-water signal is no longer active, acknowledgement by
turning the rotary knob
System pressure above the overpressure threshold, system
shuts down after 3 seconds
System pressure OK again after overpressure fault, acknowl-
edgement by turning the rotary knob
At least one pump is running
At least one pump with error message; faulty pump is indi-
cated in the Operating modes menu by a key symbol
External On/Off inputs not closed, system switched off
externally
Sensor fault, no electrical connection to the sensor
Current fault in the error memory (extended menu function
was selected)
Operating mode with standby pump selected
Standby pump is not available, i.e. at least one pump is faulty
or "External Off" switched or dry-running protection acti-
vated
Pump not available (pump malfunction, Ext.Off, sensor fault)
WILO SE 07/2011