Wilo Economy MHIE 1 Series, Installation And Operating Instructions Manual

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English
29
8 Operating faults
De-energise the pump before each
intervention and secure against non-au-
thorised restarts!
All of the incidents listed below will lead to
a switch-off via the error relay.
De-energise the pump before each intervention.
If the fluid is toxic, corrosive or hazardous for
personnel, then WILO or the authorised repair
company must be informed of the situation.
Clean the pump in such cases in order to ensure
absolute safety for the craftsmen performing
the repairs.
If the pump is at a complete standstill and an intervention is required, disconnect the power supply, wait until the LEDs have gone out completely, eliminate the fault
and reconnect the power supply. If a major fault is present, then an after-sales service employee must be called in.
If the operating fault cannot be rectified, then please
contact your local professional tradesmen or the Wilo
after-sales service in your vicinity.
ATTENTION!
Display Frequency converter beha-
viour
Fault/possible causes Elimination
Green
LED
Red
LED
Reaction time
up to standstill
Frequency
converter
Waiting time
before swit-
ching
back on
Relay status
Contact
Off On No standstill / Open a) Frequency converter sup-
ply has undervoltage.
- Check voltage at the
terminals of the fre-
quency converter.
Off On Immediate No switching
back on Open b) Frequency converter
supply has overvoltage.
- Check voltage at the
terminals of the fre-
quency converter.
Off On Immediate No switching
back on Open c) The motor has a short-cir-
cuit.
- Dismantle motor/
frequency converter
of the pump and have
it checked or repla-
ce it.
Off On <10 s No switching
back on Open d) The pump is overloaded. - excessive density and/
or viscosity of the
pumped fluid.
Off On <60 s No switching
back on Open e) The sensor cable
(4-20 mA) is disconnected
(only Mode 2).
- Check correct current
supply and cabling of
the sensor.
WILO SE 04/2016