Faults, Causes And Remedies; Decommissioning And Recycling - Wilo MISO 25-125 Manual

10 Faults, Causes and Remedies (For Bare Pump Only)
Symptoms
-- Output too low
--
Pump does not prime or only intermittently
-- Pump leaks
--
Temperature of the pump increases
--
Noisy pump
-- The motor contactor trips
Causes
1 Back pressure too high
2 Pump or pipe work, not completely filled
3 Suction lift too high or positive suction head too low
4 Impeller sealing gap too large
5 Wrong direction of rotation
6 Pump casing ,shaft seal, foot valve or suction line leaks
7 Suction lift too high or positive suction head too low
8 Loose or jammed parts in the pump
9 Casing bolts not correctly tightened
10 Mechanical seal leaks
11 Pump or pipe work not completely filled
12 Pump is running against closed valve
13 Pump or pipe work not completely filled
14 Pump is not properly leveled or is distorted
15 Foreign material in the pump
16 Earth fault
17 Operating conditions outside of performance range of pump
NOTE:
The above faults, causes and remedies are for pump only. Refer Motor / Engine manufacturers manual for the respective faults, causes
and remedies.

11 Decommissioning and recycling

Proper disposal and recycling of this product prevents damage to
the environment and risks to personal health.
Disposal in accordance with the regulations requires the product to
be drained and cleaned.
Lubricants must be collected. The pump components are to be
separated according to material (metal, plastic, electronics).
1. Use public or private disposal organizations when disposing of all
or part of the product.
2. For more information on proper disposal, please contact your local
council or waste disposal office or the supplier from whom you
obtained the product.
NOTE:
The pump must not be disposed of along with household waste!
Further information on recycling can be found at: www.wilo-
recycling.com
Installation and operating instructions WILO Mather and Platt –MISO / PISO Pumps
Possible cause of trouble and remedies
(Each number is defined in the table below)
1,2,3,4,5
6,7,8
9,10
7,11,13
10,11,14,15
8,10,16,17
Remedies
Regulate a new the operating point
Vent and fill the pump as well as the suction or in flow line
Check the liquid level; open the shut off valves on the suction side.
Clean the filters / strainers
Replace worn parts
Change the motor connection
Replace the casing seal. Check the shaft seal. Check the flange
connections Check the liquid level; open the shut off valves on the suction side.
Clean the filters on the suction side
Open and clean the pump
Check the tightening torque of the casing bolts
Check the seal surfaces and rubber material of the mechanical seal.
In case of damages exchange mechanical seal
Vent and fill the pump as well as the suction line or in flow line
Open the shut off valve on discharge side
Purge of air the pump and the pipe work
Check the pump leveling and alignment
Dismantle and clean the pump
Check the earth connection.
Check the potential causes such as damaged wirings or cables,
leakages on electrical parts
Refer to pump operating conditions stated in technical data
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