Winter WSCA 500, Инструкция по эксплуатации, Страница: 24 / 28

Document: U99_001 page 22 of 24
8. Interruptions
Example to use Interruption matrix:
Fault:
Pump runs not properly/noisy
From the list of mechanic interruptions take code letter „E“
According to the following chart; Interruption matrix: The following causes are possible:
4; 8; 13; 14; 15; 16; 17; 18
In the following chart; Causes and fault removal: Select the possible causes by means of code letters and consider.
8.1 Hydrodynamic faults
A insufficient discharge flow
B insufficient discharge height
C Pump does not suck
D Interruption of discharge flow just after starting of pump
8.2 Mechanic faults
E Pump runs not properly/noisy
F Pump runs very noisy
G Strong leakage at shaft sealing
H Leakage at pump
I Motor is overloaded
8.3 Electric faults
consider VdE rules at electric faults!
Fault-removal according to product specific checklist
Fault 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
A
B
C
D
E
F
G
H
I
Chart 6: Interruption matrix
No. Cause Fault-removal measurements
1 Too much counter pressure of plant Adjust to requested duty point
2 Too much discharge flow Adjust to requested duty point
3 Too much suction height
Reduce suction height
Increase inlet pressure
Suction medium is too hot
4 Wrong rotation direction If driven be E-motor change two phases
5 Pump and circuit is not filled Vent pump and circuit
6
Airlocks in suction pipe Change construction of conduit so that no airlocks can arise
7 Leaking suction pipe
Check flange gaskets
Check, whether foot valve closes
8 Foreign substances in pump or impeller Remove volute casing, check volute and impeller channels
9 Shaft seal is worn out
Change shaft seal
Check, whether conveyed medium complies with medium
stated in customer order documents.
10
Loose connection screws Retighten connection screws
11 Defective casing gasket Change casing gasket
12 Wrong speed of rotation
E-motor with wrong speed; change motor
Combustion engine
13 Inner parts worn out Change defective parts
14 Insufficient counter value
Check the whole plant
Adjust to requested counter pressure
15 Bad/wrong alignment of aggregate or coupling Check coupling and align new, if necessary
16 Pump is implemented in conduit with stress;
resonance oszillations, Support conduit by suitable measurements
17 Imbalance of impeller
Impeller is worn out, change impeller
Impeller channels are blocked/dirty; clean impeller
18 Insufficient discharge flow
Consider minimum discharge flow
Adjust to requested discharge flow
19
Higher density or viscosity than requested in
customer order
Use motor with more power. „Necessarily contact
manufacturer! “
Adjust density and viscosity according to customer order
requirements
20 Motor runs on two phases Monitoring of phases check of over current relay
21 Malfunction of switchover form star- to delta
connection Check star-delta connection
Chart 7: Causes and fault removal