Wilo Wilo-VR-System User Manual

English
26 WILO SE 07/2011
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!
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
Indication Reaction Cause and remedy
Mains On/Off LED
Is not on Check position of main switch.
Check the power supply for the electronic modules, the mains
voltage and the fuses
Low water LED
Is on,
At least one pump is running
Low-water signal is applied; however, period of time below
the delay time T1
Is on,
Pumps off
Low-water signal active, pumps stopped once the delay time
T1 passed.
Flashing Low-water signal is no longer active, acknowledgement by
turning the rotary knob
Overpressure LED
Is on System pressure above the overpressure threshold, system
shuts down after 3 seconds
Flashing System pressure OK again after overpressure fault, acknowl-
edgement by turning t
he rotary knob
Pump green LED
Is on At least one pump is running
Pump red LED
Is on At least one pump with error message; faulty pump is indi-
cated in the Operating mod
es menu by a key symbol
LC display
“O F F” indicator flashing with cur-
rent system pressure
External On/Off inputs not closed, system switched off
externally
LC display
“S F” indicator Sensor fault, no electrical connection to the sensor
LC display
“E r r” indicator Current fault in the error memory (extended menu function
was selected)
LC display symbol
Is on Operating mode with standby pump selected
Flashing Standby pump is not available, i.e. at least one pump is faulty
or “External Off” switched or dry-running protection acti-
vated
LC display
“Key” symbol
Is on Pump not available (pump malfunction, Ext.Off, sensor fault)

Wilo Wilo-VR-System Specifications

General

Brand	Wilo
Model	Wilo-VR-System
Category	Control Unit
Language	English