Xylem TVS - Manual (Page 42)

Installation, Operating and Maintenance Instruction
Model TVS
page 34
Meaning of code number for cause and method of repair
1.
Motor protection switch is wrongly set
• Check setting or replace the motor protection switch
2. Phase failure
• replace defective safety fuses
• Check pipes for damage
3. Wrong frequencies or under voltage
• Compare voltage and frequency with data on the rating plate
4. Rotates in the wrong direction
• Swap over phases of power supply
5. Motor winding or electrical cable defective
• Ask for assistance
6. Motor gets caught at the star delta at the star stage
• Replace star delta converter
7. Voltage loss due to burned out safety fuse
• Replace safety fuse
8. Voltage loss due to defective feeding cables
• Renew cables
9. Voltage loss due to motor protection switch being released
• Establish the causes
• Reset the motor protection switch
10. Pump is blocked due to impurities
• Dismantle and clean the pump part
11. Pump does not reach the handled liquid due to it not being installed deeply enough
• Check the water level
• Hang the unit deeper
12. Defective coupling
• Replace shaft and coupling
13. Gate valve closed
• open
14. Suction filter displaced by foreign bodies
• Take out pump and clean the suction filter
15. uninspected, wrong direction of rotation
• change direction of rotation
16. Gate valve not quite open
• open
17. Pipes constricted by foreign bodies
• clean pipes
18. Well filter blocked
• Consult well sinker company
19. Leakage in the delivery pipe
• Check pipes
20. Impellers worn because liquid handled is aggressive or contains sand
• Dismantle unit and replace the impellers (be careful when selecting material)
21. Impellers worn due to cavitation
• Check operating conditions
22. too little speed due to under voltage or wrong frequencies
• Check mains voltage and mains frequency
23. too little speed because running in 2 phases
• check electrical branch circuit connections and safety fuses
24. Flow rate too high or too low
• Adjust valve