Maintenance Measures - Wilo EMU FA Notice De Montage Et De Mise En Service

9.5

Maintenance measures

9.5.1 Recommended maintenance
measures
9.5.2 Visual inspection of the power
supply cable
9.5.3 Visual inspection of accessories
9.5.4 Visual inspection of coatings and
housing for wear
9.5.5 Function test of the monitoring
device
9.5.5.1 Testing the resistor of the ex-
ternal electrode for sealing cham-
ber control
Installation and operating instructions Wilo-EMU FA + F-Motor
Maintenance and repair
When using pumps under hard conditions, it is recommended to sign a maintenance
contract. Contact customer service.
WARNING
Sharp edges on the impeller and suction port!
Sharp edges can form on the impeller and suction port. There is danger of limbs be-
ing severed! Protective gloves must be worn to protect from cuts.
WARNING
Hand, foot or eye injuries due to the absence of protective equipment!
Danger of (serious) injuries during work. Wear the following protective equipment:
• Safety gloves for protection against cuts
• Safety shoes
• Closed safety goggles
The following pre-requisites must be fulfilled prior to starting maintenance measures:
▪ Pump cooled down to the ambient temperature.
▪ Pump cleaned thoroughly and disinfected (if required).
Regular inspection of power consumption and the operating voltage in all three phases
is recommended for smooth operation. In normal operation, these values remain con-
stant. Slight fluctuations depend on the characteristics of the fluid. Power consumption
can provide an early indication of damage or malfunctions in the impeller, bearings or
motor, which can be rectified. Larger voltage fluctuations strain the motor winding and
can cause the pump to break down. Regular inspections can therefore largely prevent
major secondary damage and reduce the risk of total breakdown. In this regard, it is re-
commended to use remote monitoring for regular inspections.
The power supply cables must be checked for:
▪ Bubbles
▪ Cracks
▪ Scratches
▪ Abrasion
▪ Crushing
If the power supply cables are damaged, the pump must be decommissioned immedi-
ately! Customer service must replace the damaged power supply cable. The pump may
only be started up again once the damage has been properly remedied.
CAUTION! Water may penetrate into the pump due to the damaged power supply
cables! Water ingress leads to total damage of the pump.
Accessories must be checked for:
▪ Correct fixation
▪ Smooth function
▪ Wear symptoms
Any defects detected must be repaired immediately or the accessories must be re-
placed.
The coatings and housing parts must not show any signs of damage. If there are de-
fects, the following must be observed:
▪ If the coating is damaged, it must be restored.
▪ Contact customer service if housing parts have worn out!
To test resistances, the pump must be cooled down to the ambient temperature!
Measure the resistor of the electrode with an ohmmeter. The measured value must ap-
proach "infinity". For values ≤ 30 kOhm, if there is water in the oil – change the oil!
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