Faults, Causes And Remedies - Wilo RAIN3 Série Notice De Montage Et De Mise En Service

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Faults, causes and remedies

Faults
The pump does not start
The pump does not deliver
Pressure too low
The pump stops
The pump starts and stops per-
manently
The pump is not tight
The three-way valve is not work-
ing anymore
Default indication on the control
panel
The system is running with city
main water whereas the rainwater
storage thank is full
The float valve in the break-tank
is not closing/water is draining
through the overflow
Installation and operating instructions Wilo-RAIN3
Faults, causes and remedies
DANGER
Death hazard!
Death hazard by electrocution during work on the electrical devices.
In order to do maintenance work and repairs, the device/installation must be turned
off and secured against being inadvertently switched on.
In a general matter, only a qualified electrician or installer is authorized to repair the
damaged connecting cables.
A yearly control of the installation by an after-sales service is recommended. The pump
does not require any maintenance. At least once a year, it is recommended to control
the water tightness of the installation.
If the system is not used for a long period, it is recommended to close the city main wa-
ter inlet, unplug the socket to cut the power and drain the complete installation. Use
the lower hole of the pump to drain it. Check the first step of chapter 6.4 for the break-
tank drainage process.
DANGER
Health hazard!
Repair work may only be carried out by qualified personnel! Respect the safety in-
structions in chapter 9.
Causes
No electrical power supply
the suction head is too high
Suction head too high
Suction filter/strainer/foot valve clogged
Circuit breaker of the engine triggered
Light leakage or defective shut-off device
Faulty mechanical seal
Blocked due to sediments on the valve seat
The float switch signal sent to the controller is
wrong because the cable is damaged or the float
switch is blocked inside the rainwater storage
tank
The control panel is in manual mode
Despite the sufficient water level in the tank, the
float switch did not change the supply mode.
The cable is damaged or the float switch is
blocked inside the tank
The system is automatically renewing the water
inside the break-tank (check chapter 7.1)
The float valve is defective or mechanically
blocked
Controller error codes
Remedies
Control the fuses/circuit breakers on the electric
board, the connections and the power supply
cable and then restart the system.
Check the water level in the rainwater storage
tank.
Clean the filter or the strainer of the foot valve in
the rainwater storage.
Check the water level.
Restart after cooling.
Close the draining pipe to look for the default.
Change the pump
visual check and, if necessary, dismantle and
clean the valve.
Check the contacts or perform a visual control.
Restore the correct functioning mode on the
control panel.
Check the contacts or perform a visual control.
Nothing to do, it's a programmed feature. Check
chapter 7.1.
Perform a visual check, and if needed remove the
break-tank in order to check the float valve.
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