Wilo SiFlux Series, Installation And Operating Instructions Manual

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English
Installation and operating instructions Wilo-SiFlux 23
• Follow the installation and operating instructions for the pump,
level control device and other accessories.
DANGER! Risk of burns when body parts come into contact with
the pump!
Depending on the pump or system operating conditions (fluid tem-
perature), the entire pump can become very hot.
• Keep a safe distance during operation!
• In the case of high water temperatures and system pressures, allow
the pump to cool down before working on it.
• Always wear protective clothing and gloves when working.
Fault Cause Remedy
10.1 ONE OR TWO PUMPS FAIL TO PRIME Air leaks at suction. Check tightness of high suction pipe
connections.
Suction piping obstructed or valve
on suction manifold closed. Check valve opening and clean the
piping if necessary.
10.2 ONE PUMP FAILS TO RUN Thermal relay tripped. The pump "fault" indicator on the
switchgear must be lit.
Check the setting of the thermal
relay and reset it.
Magnetic circuit breaker or fuses
defective or blown. Check that the motor phases are not
short-circuited. Replace the motor
if necessary.
Reset the circuit breaker or replace
the fuses (check their ratings).
Pump shaft blocked. Switch off the electric supply of the
switchgear and then check if the
shaft turns smoothly. If it is
blocked, dismantle the pump.
Winding fault. Disconnect the terminal board of
the terminal block and check the
stator insulation to earth. Replace
the motor if necessary.
10.3 NO DELIVERY PRESSURE Flow higher than system capabili-
ties. Plan to replace the system by a more
adequate one (do not forget to con-
tact us in any case).
One or two pumps do not pump
anymore. See 10.1.
A pump is obstructed by particles. Have the pump dismantled and
cleaned.
Voltage of the motors too low. Check the voltage on motor termi-
nals.
10.4 RANDOM OPERATING, STARTING
FREQUENCY TOO HIGH Pressure transmitter defective. Check the setting: transmitter not
stable, replace it if necessary
10.5 OPERATING SWITCHGEAR DEFEC-
TIVE Switchbox or cabinet defective. See commissioning instructions of
the switchgear or cabinet.
Wires disconnected. Check all connections to the termi-
nal block of the switchgear.
Transmitter defective. Check the contacts, change the
respective transmitter if necessary.
10.6 PRESSUREVALVE ON DELIVERY SIDE
NOT TIGHT Valve diaphragm or ring destroyed. Change the valves.
10.7 CONVERTER FAULT A fault indication appears on the
display of the frequency converter. See commissioning instructions of
the pump.
10.8 THE SYSTEM DOES NOT STOP OR
START The shut-off valve is closed. Open the shut-off valve (rep. 16).