Wilo RAIN 3-25 EM, Installation And Operating Instructions Manual

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Faults, causes and remedies en
Installation and operating instructions Wilo-RAIN3 41
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.
10 Faults, causes and remedies
DANGER
Health hazard!
Repair work may only be carried out by qualified personnel! Respect the safety in-
structions in chapter 9.
Faults Causes Remedies
The pump does not start
No electrical power supply Control the fuses/circuit breakers on the electric
board, the connections and the power supply
cable and then restart the system.
The pump does not deliver
the suction head is too high Check the water level in the rainwater storage
tank.
Pressure too low
Suction head too high Clean the filter or the strainer of the foot valve in
the rainwater storage.
Suction filter/strainer/foot valve clogged Check the water level.
The pump stops
Circuit breaker of the engine triggered Restart after cooling.
The pump starts and stops per-
manently Light leakage or defective shut-off device Close the draining pipe to look for the default.
The pump is not tight
Faulty mechanical seal Change the pump
The three-way valve is not work-
ing anymore Blocked due to sediments on the valve seat visual check and, if necessary, dismantle and
clean the valve.
Default indication on the control
panel
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 Check the contacts or perform a visual control.
The system is running with city
main water whereas the rainwater
storage thank is full The control panel is in manual mode Restore the correct functioning mode on the
control panel.
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 Check the contacts or perform a visual control.
The system is automatically renewing the water
inside the break-tank (check chapter 7.1) Nothing to do, it’s a programmed feature. Check
chapter 7.1.
The float valve in the break-tank
is not closing/water is draining
through the overflow The float valve is defective or mechanically
blocked Perform a visual check, and if needed remove the
break-tank in order to check the float valve.
Controller error codes