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

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Maintenance

10

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
Installation and operating instructions Wilo-RAIN3
Maintenance
We recommend doing the commissioning of the installation by the Wilo after-sales ser-
vice.
Commissioning steps:
ƒ
Pump venting: unscrew and remove the plug of the pump, fill the pump with clear
water by means of funnel (Fig. 12).Screw back the plug.
ƒ
Check that all flexible hoses are properly connected and tight.
ƒ
Open the city main water inlet and wait for the break-tank filling.
ƒ
Plug in the power supply socket and switch on the system.
ƒ
Use the interface of the controller (see chapter 6.4) to switch to the manual/main
water mode. The pump and the suction pipes are filling up with water.
ƒ
Select automatic running mode.
ƒ
Open successively all taps or water outlets of the installation in order to remove all
the residual air. The pump should turn on during this step. Otherwise, the controller
switches to the failure mode. Acknowledge the failure until the pump is completely
primed.
ƒ
Close all taps of the installation and check the water tightness of the system.
The product is ready to run.
Only qualified personnel is authorized to performed maintenance work and repairs.
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 step 2 of chapter 7.3 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 check valve
Faulty mechanical seal
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
en
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