Grundfos MTS 140, Инструкция по установке и эксплуатации

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11. Fault finding
Possible faults are identified by a fault number in the
table below. This number identifies the cause and
remedy in the fault finding list.
If faults occur which are not specified in the following
table or cannot be traced back to the specified
causes, please consult Grundfos.
WARNING
Electric shock
Death or serious personal injury
- Before starting any work on the product,
make sure that the power supply has
been switched off and that it cannot be
accidentally switched on.
WARNING
Moving parts
Death or serious personal injury
- Tighten the coupling screws to the
correct torque.
- Install the coupling guards securely to
the pump with the screws intended for
this purpose.
CAUTION
Corrosive liquids
Death or serious personal injury
- Wear personal protective equipment.
CAUTION
Toxic liquids
Death or serious personal injury
- Wear personal protective equipment.
CAUTION
Hot or cold liquid
Minor or moderate personal injury
- Wear personal protective equipment.
CAUTION
Hot or cold surface
Minor or moderate personal injury
- Make sure that no one can accidentally
come into contact with hot or cold
surfaces.
Fault
number
Fault description
Fault
number
Fault description
1 Pump is not pumping 5 Unstable pump operation (jerks and noise)
2 Pump performance is insufficient 6 Pump is jammed
3 Pump performance is excessive 7 Pump is leaking
4 No inlet pressure 8 Excessive motor power input
Fault number
Cause Remedy
1 2 3 4 5 6 7 8
X - - - - - - - Transport screw plugs still in place.
• Remove the transport screw
plugs.
• Dismantle the pump and inspect it
for dry-running damage.
X - - - - - - -
Supply or suction pipe is closed by
the valve. • Open the valve.
X - - - X - - -
Supply or suction pipe is not vented
properly or not filled up completely. • Fill up the pump and/or pipes
completely and vent them.
X - - - X - - -
Formation of air pockets in the
supply or suction pipe.
• Install a venting device.
• Correct the pipe layout.
X - - - X - - - Discharge pipe is blocked. • Clean the discharge pipe.
X - - X X - - -
Incorrect direction of rotation of the
pump.
• Exchange any two phases of the
motor power supply. See section
4.1.3 Checking direction of
rotation
.
X - - X - X - - Pump is very dirty. • Dismount and clean the pump.