North Ridge Pumps DM User manual

GB
TÜV NORD Italia
S.r.l.
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TROUBLESHOOTING GUIDE
Product Specification Sheet
X-Cel House, Chrysalis Way, Langley Bridge, Eastwood, Nottinghamshire NG16 3RY
Tel: [phone] | Email: [email protected] | Website: www.northridgepumps.com
DM
MAGNETIC DRIVE CENTRIFUGAL PUMP

1 The pump doesn’t start 1.1 Power failure.
1.2 Seized impeller.
1.1a Check the electrical power circuit and supply
1.2a Disassemble the pump body and check.
2 The pump runs but does
notpump.
2.1 The impeller is damaged.
2.2 The manual delivery valve
is closed.
2.3 Suction is blocked.
2.4 Fluid is too dense.
2.5 Clogged suction.
3 The pump does not deliver
as per performance curve.
3.1 Fluid is too dense.
3.2 Clogged delivery pipe.
3.3 Clogged suction.
3.4 The impeller is damaged.
3.5 Damaged pump body.
3.6 Electrical motor is wrongly
connected.
3.7 The electric motor is da-
maged.
2.1a Disassemble the pump and check the impeller.
2.2a Open the delivery valve and/or check the delivery pipes
2.3a Open the suction valve and/or check the suction pipes
and lter condtitons
2.4a Install oversized pipes, especially for suction and decre-
ase the pump revolutions
2.5a Check and clean
3.1a No solution.
3.2a Check and clean.
3.3a Check and clean.
3.4a Replace the pneumatic exchanger.
3.5a Disassemble the pump body and check.
3.6a Check the electrical connection and power voltage.
3.7a Replace the motor.
GB PROBLEM POSSIBLE SOURCE SUGGESTION
4 The pump vibrates. 4.1 Suction clogs while wor-
king.
4.2 Damaged pump shaft.
4.3 The impeller touches the
pump body.
4.4 Incorrect installation.
4.5 Loose magnet
4.6 Drive magnet rubbing
4.1a Replace suction pipe.
4.2a Disassemble pump and motor and check the shaft and
its rotation concentricity.
4.3a Open the pump and check.
4.4a Check the installation again with greater care.
4.5a Check magnet status
4.6a Check magnet status
5 The motor overheats. 5.1 Fluid is too dense.
5.2 Wrong electrical connec-
tion.
5.3 The impeller touches the
pump body or there is some
foreign matter.
5.4 Damaged pump shaft.
4.7 Pump cavitating from im-
proper suction or feed
4.8 Motor or piping not pro-
perly secured
4.9 Foreign object in impeller
5.1a No solution.
5.2a Check the supply voltage and the motor connection/s.
5.3a Open the pump and check.
5.4a Open the pump, disassemble the motor and check the
pump shaft and its rotation concentricity.
4.7a Check pump suction
4.8a Check motor tube fastenings
4.9a Check impeller status
I
TROUBLESHOOTING GUIDE
Product Specification Sheet
X-Cel House, Chrysalis Way, Langley Bridge, Eastwood, Nottinghamshire NG16 3RY
Tel: [phone] | Email: [email protected] | Website: www.northridgepumps.com