Wilo SiClean Comfort 12, Installation And Operating Instructions Manual, Page: 52 / 108

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48 WILO SE 03/2018
11.3 Main faults, causes and remedies
If the fault cannot be remedied, please contact the trade or your near-
est Wilo-After-sales Service or agent.
Fault Cause Remedy
The pump fails to run Magnetothermal breaker tripped Check that the motor phases are not
in short-circuit. Replace the motor if
necessary.
Reset the circuit breaker.
Pump shaft blocked Switch off the electric supply of the
switchgear and then check the shaft
turns freely, if it is blocked, see
installation and operating instruc-
tions of the pump.
The pump fails to prime Air leak at suction Check tightness of all suction pipe
connections.
Suction pipe obstructed or valve on
suction side closed Check valve opening and clean the
piping if necessary.
No delivery pressure The pump turns the wrong way Check direction of rotation of the
pump. Interchange two phases on
the motor terminal block if direction
is not correct.
One or two pumps are no more
primed See before.
The pump is obstructed by particles Dismantle the pump and clean it.
Voltage of the motor is too low Check the voltage on motor termi-
nals.
The motorised valve fails to open The valve is blocked Check the lock using the hand oper-
ating key supplied with the valve .
The servomotor is not powered or
under-supplied Check the wiring.
Check the voltage of the motorised
valve in the switchgear.
Valve opening timer too short or no
timer Adjust it.
The fault indicator lights The motorised valve fails to close See before.
Timer of leakage detector too short Adjust it to the recommended value.
If necessary, increase slightly.
The sludge disposal is clogged Check the piping and clean if neces-
sary.
Defective automation device Switchgear or cabinet defective See installation and operating
instructions of the switchgear.
Wires disconnected Check all connections to the termi-
nal block of the switchgear.