ETNA EPH B-M46 Series, Инструкция по установке, эксплуатации, обслуживанию и каталог запасных частей

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18. Troubleshooting
Making sure the booster set is disconnected from the mains before performing any maintenance operations.
FAILURE REASON SOLUTION
1) The booster set does not start A. No mains voltage
B. Blown fuses because the mo-
tor or the power supply cable are
short-circuited
C. Overload protection previously
activated
A. Supply electric power
B. Repair the motor or replace the
cable
C. Reset the protector (If it repeats
again, see problem 4)
2) The booster set does not deliver
a reduced or irregular flow A. Piping obstructed or valve
jammed
B. Pump not primed because it has
not been filled, or because of faulty
seal on suction piping or foot valve
(contains the mechanical seal may
have been seriously damaged)
C. Difference in level and/or exces-
sive suction flow resistance
D. Incorrect rotation direction
(3-phase motors only)
E. Air in suction pipe or pump
A. Dismantle and clear or replace.
B. Fill the pump with liquid after
checking the seal on the suction
pipe and foot valve, and the integ-
rity of the mechanical seal.
C. Reduce the difference in level.
Use a large diameter pipe. Clear
the foot valve. Replace the foot
valve with a larger capacity valve.
D. Invert power supply wires on the
terminal board
E. Bleed the air
3) The pumps vibrate and noisy. A. The pump is cavitating
B. Worn motor or support
bearings.
C. Foreign bodies between fixed
and rotating parts of pump
A. Check the flow-see probable
cause 2C
B. Replace the bearings
C. Clean or replace the parts.
4) The overload protector steps in
a. Accidently
b. Systematically
A. See 3C
B. Temporary lack of a phase
C. See 3B
D. To many numbers of start-stops
D. The membrane is blown or les
air in the membrane tank replace
the membrane or charge the air
into the tank %10 less of the start-
ing pressure value when the system
is not under pressure
5) The pump rotates in reverse
when it is stopped A. Leek in the suction pipe
B. Faulty foot valve or check valve
C. Air in suction pipe
A. Repair or replace
B. Replace faulty foot valve
C. Discharge the air
6)The pumps do not make change
over A. Wrong pressure switch setting.
B. Damaged electronic card
A. Adjust the pressure switches
B. Replace the electronic card