En
gl
is
h (
G
B)
12
10. Fault finding
11. Disposal
This product or parts of it must be disposed of in an
environmentally sound way:
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest
Grundfos company or service workshop.
Warning
Before starting work on the pump, make
sure that the power supply has been
switched off and that it cannot be
accidentally switched on.
Fault
Cause
Remedy
1.
Motor does not run
when power supply
is switched on.
a)
Supply failure.
Connect the power supply.
b)
Fuses are blown.
Replace fuses.
c)
Motor-protective circuit breaker
has tripped out.
Reactivate the motor protection.
d)
Main contacts in motor-protective
circuit breaker are not making
contact or the coil is faulty.
Replace contacts or magnetic coil.
e)
Control circuit is defective.
Repair the control circuit.
f)
Motor is defective.
Replace the pump.
2.
Motor-protective
circuit breaker trips
out immediately
when power supply
is switched on.
a)
Fuse on one phase is blown.
Replace fuse.
b)
Contacts in motor-protective circuit
breaker are faulty.
Replace contacts in motor-protective
circuit breaker.
c)
Cable connection is loose or faulty. Fasten or replace the cable connection.
d)
Motor winding is defective.
Replace the pump.
e)
Pump mechanically blocked.
Remove the mechanical blocking of the
pump.
f)
Overload setting is too low.
Set the motor-protective circuit breaker
correctly.
3.
Motor-protective
circuit breaker trips
out occasionally.
a)
Overload setting is too low.
Set the motor-protective circuit breaker
correctly.
b)
Low voltage at peak times.
Check the power supply.
4.
Motor-protective
circuit breaker has
not tripped out but
the pump does not
run.
a)
Check 1 a), b), d) and e).
5.
Pump runs but gives
no liquid or pump
capacity is not
constant.
a)
Pump inlet partly blocked by
impurities.
Clean the inlet.
b)
Liquid level in tank too low.
Increase the liquid level.
c)
Pump rotates in the wrong
direction.
Change the direction of rotation of the
motor by switching any two of the
phases.
Summary of Contents for MTA 100H
Page 1: ...MTA Installation and operating instructions GRUNDFOS INSTRUCTIONS...
Page 2: ...2...
Page 19: ...BG 19 7 1 2 8 9 8 8 1 8 2 8 3 10 9 Grundfos Grundfos Grundfos TM04 8003 2610 TM04 8004 2610...
Page 20: ...BG 20 10 11 1 2 Grundfos 1 a b c d e f 2 a b c d e f 3 a b 4 a 1 a b d e 5 a b c...
Page 83: ...GR 83 7 1 2 8 9 8 8 1 8 2 8 3 10 9 Grundfos Grundfos TM04 8003 2610 TM04 8004 2610...
Page 84: ...GR 84 10 11 1 2 Grundfos 1 a b c d e f 2 a b c d e f 3 a b 4 a 1 a b d e 5 a b c...
Page 171: ...RU 171 7 1 2 8 9 8 8 1 8 2 8 3 10 9 Grundfos Grundfos TM04 8003 2610 TM04 8004 2610...
Page 172: ...RU 172 10 1 a b c d e f 2 a b c d e f 3 a b 4 a 1 a b d e 5 a b c...
Page 204: ...UA 204 7 1 2 8 9 8 8 1 8 2 8 3 10 9 Grundfos Grundfos Grundfos TM04 8003 2610 TM04 8004 2610...
Page 205: ...UA 205 10 11 1 2 Grundfos 1 a b c d e f 2 a b c d e f 3 a b 4 a 1 5 a b c...
Page 209: ...209...
