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AM 50-125AE 230/50 Hz 100501753
Инструкция по эксплуатации A Страница: 13

CALPEDA AM 50-125AE 230/50 Hz 100501753 Инструкция по эксплуатации A онлайн [13/64] 840824

A,AS Rev16 - Operating Instructions Page 13 / 64

11. TROUBLESHOOTING

OFF

WARNING: Turn off the power supply before performing any operations.

Do not allow the pump or motor to run when dry even for a short period.

Strictly follow the user instructions and if necessary contact an authorised service centre.

PROBLEM

PROBABLE CAUSES POSSIBLE REMEDIES

The motor does

not start

1a) Unsuitable power supply

1b) Incorrect electrical connections

1c) Engine overload protective device cuts

in.

1d) Blown or defective fuses

1e) Shaft blocked

1f) If the above causes have already

been checked, the engine may be

malfunctioning

1a) Check that the mains frequency and voltage correspond to the electrical

characteristics shown on the indicator plate

1b) Connect the power supply cable to the terminal board correctly. Check that

the thermal overload protection is set correctly (see data on the engine

indicator plate) and make sure that the fuseboard upline of the engine has

been properly connected

1c) Check the power supply and make sure that the pump shaft is turning

freely. Check that the thermal overload protection has been set correctly

(see engine indicator plate)

1d)

Replace the fuses, check the electric power supply and points a) and c)

1e) Remove the cause of blockage as indicated in the “Blocked pump”

instruction booklet

1f) Repair or replace the engine by applying to an authorised service centre

Pump blocked

2a) Prolonged periods of inactivity with

formation of rust inside the pump

2b) Presence of solid bodies in the pump

rotor

2c) Bearings siezed

2a) Rotation may be started directly from the pump shaft or from the joint

(remember to turn off the electricity supply rst ) or contact an authorised

service centre

2b) If possible, dismantle the pump casing and remove any solid foreign

bodies inside the rotor, if necessary contact an authorised service centre

2c) If the bearings are damaged replace them or if necessary contact an

authorised service centre

The pump

functions

but no water

comes out

3a) Possible inltration of air from suction

tube connections, drain plugs or lling of

pump or from the gaskets of the suction

pipe

3b) Foot valve blocked or suction pipe not

fully immersed in liquid

3c) Suction lter blocked

3a) Check which part is not tight and seal the connection adequately

3b) Clean or replace the bottom valve and use a suction pipe suitable for the

application

3c) Clean the lter, if necessary, replace it . See point 2a) also.

Insufcient ow

4a) Pipes and accessories with diameter too

small causing excessive loss of head

4b) Presence of deposits or solid bodies in

the internal passages of the rotor

4c) Rotor deteriorated

4d) Worn rotor and pump case

4e) Excessive viscosity of the liquid pumped

(if other than water)

4f) Incorrect direction of rotation

4g) Suction head excessive in relation to the

suction capacity of pump

4h) Suction pipe too long

4a) Use pipes and accessories suitable for the specic application

4b) Clean the rotor and install a suction lter to prevent other foreign bodies

from entering

4c) Replace the rotor, if necessary, contact an authorised service centre

4d) Replace the rotor and the pump casing

4e) The pump is unsuitable

4f) Invert the electrical connections on the terminal board or control panel

4g) Try to close the feeder gate partially and/or reduce the difference in level

of the pump and the liquid being aspirated

4h) Bring the pump closer to the suction tank so as to use a shorter pipe. If

necessary use a pipe of a wider diameter

Noise and

vibrations

from the pump

5a) Rotating part unbalanced

5b) Worn bearings

5c) Pump and pipes not rmly attached

5d) Flow too strong for the diameter of the

delivery pipe

5e) Functioning in cavitation

5f) Unbalanced power supply

5g) Incorrect alignment of pump-motor unit

5a) Check that no solid bodies are obstructing the rotor

5b) Replace the bearings

5c) Anchor the delivery and suction piping as needed

5d) Use bigger diameters or reduce the pump ow

5e) Reduce the ow by adjusting the feeder gate and/or using pipes with a

bigger internal diameter. See point 4g) too

5f) Check that the mains voltage is right

5g) If necessary, the unit must be re-aligned

Leakage from

the mechanical

seal

6a) The mechanical seal has functioned

when dry or has stuck

6b) Mechanical seal scored by presence of

abrasive parts in the liquid pumped

6c) Mechanical seal unsuitable for the type

of application

6d) Slight initial drip during lling or on rst

start-up

In cases 6a), 6b) and 6c), replace the seal, if necessary contact an authorised

service centre

6a) Make sure that the pump casing (and the suction pipe if the pump is not

self-priming) are full of liquid and that all the air has been expelled. See

point 5 e) too.

6b) Install a suction lter and use a seal suited to the characteristics of the

liquid being pumped.

6c) Choose a seal with characteristics suitable for the specic application

6d) Wait for the seal to adjust to the rotation of the shaft. If the problem

persists, see points 6a), 6b) or 6c) or contact an authorised service centre.

A,AS Rev16.indd 13 13/02/20 10:10

CALPEDA AM 50-125AE 230/50 Hz 100501753 Инструкция по эксплуатации A онлайн [13/64] 840824

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