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7. MAINTENANCE
- The booster requires no special maintenance during operation.
- The motor bearings have lifetime lubrication.
- The mechanical packing requires no maintenance during opera-
tion.
- In periods when the ambient temperature is below 0ºC or the pump
8. MALFUNCTIONS
Always DISCONNECT THE UNIT FROM THE ELECTRICITY SUPPLY
before carrying out repair and maintenance work on it.
MALFUNCTION
8.1 ONE OR TWO
a) Air inlet at suction:
PUMPS CANNOT
BE PRIMED
b) Foot valve / strainer: (version "B") not
watertight or obstructed:
c) Major loss of load on suction:
d) Municipal mains water pressure insufficient
or non-existent:
e) Suction piping obstructed or suction tube
valve closed:
8.2 ONE PUMP DOES
a) magnetic protection tripped:
NOT OPERATE
(version CVV)
b) Defective or spent fuses:
(version EBMS)
c) Pump shaft blocked:
d) Defective windings:
8.3 LACK OF DIS-
a) Flow required is greater than the capacity
CHARGE PRESSURE
of the unit:
b) One or two pumps unprimed:
c) Municipal mains water pressure lower than
the minimum pressure needed:
d) One pump is obstructed by foreign matter:
e) The motors are being supplied at insuffi-
cient voltage:
8.4 INTERMITTENT OPE-
a) Pressure transmitter defective:
RATION; PUMPS
b) Equipment has insufficient capacity:
STOP AND START
c) No air in reservoir:
FREQUENTLY
8.5 DRY RUNNING
a) Dry running pressure switch adjusted too
SAFETY DEVICE
high:
TRIPS FREQUENTLY
b) Fall in municipal mains water pressure
when pumps start up:
8.6 OPERATIONAL
a) Fuses blown (version EBMS):
AUTOMATIC CON-
b) Contact breaker tripped (version CVV):
TROL DEFECTIVE
c) Wires disconnected:
d) Defective transmitter:
8.7 DISCHARGE
a) Valve membrane destroyed:
VALVE NOT
WATERTIGHT
8.8 PUMP VARIABLE
a) Code E00 until E42 lit:
SPEED DRIVE
SHOWS ERROR
MESSAGE
CAUSE
a) Check all the suction piping connections for watertightness. Check that the suction
strainer (version "B") is well covered with water.
b) Check the seal on the valve; replace if necessary.
c) Calculate the load losses and make sure that they are compatible with the pumps'
NPSH.
d) If this happens more than once, it is important to make use of a tank.
e) Check the valve opening and clean the tubing if necessary.
a) Reset the contact breaker inside the control box. If there is persistent tripping,
check the contact breaker and the connection between the control box and the
pump.
b) Replace them (check their rating).
c) Disassemble the pump, clean it and replace the defective parts.
d) Disassemble the pump, check it or replace it.
a) Consider replacing the unit with a more suitable one (refer to us in any case).
b) Check that the suction strainer (version "B") is not absorbing air or that the tank
inflow is not too close to the strainer.
c) Discuss the matter with the water company or replace the unit. Refer to us.
d) Disassemble and clean the pump.
e) Check the voltage at the motor terminals.
a) Check the setting: the transmitter may be unstable. Replace it if necessary.
b) Install an additional tank.
c) Inflate the reservoir or replace the bladder.
a) Set the pressure switch correctly.
b) Set the dry running pressure switch at min. If the situation persists, it means the muni-
cipal mains water supply is insufficient: check the pressure on the pressure gauge
when the pumps are being started up, or refer to the water company.
a) Replace them.
b) Replace them.
c) Check all the connections to the control box terminals.
d) Check the contacts, change the transmitter concerned if necessary.
a) Change the valves.
a) See the pump commissioning instructions (Chapter "Malfunctions).
10
is stopped for a long time, it should be drained by unscrewing the
plug inside.
CAUTION !
Always fill the pump before using it again.
REMEDY
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