Xylem Z8 ZR8 Z10 ZR10 Z12 ZR12 - Manual (Page 35)

Installation, Operating and Maintenance Instruction
page 35
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
10. Repairs
Repairs to the pump or pump system may only
be carried out by authorized skilled personnel or
by the manufacturer's specialist staff.
Trained Customer Service engineers are available to
assist with installation and repair work on request.
When removing the pump or the motor, you must
comply with Point 1.4 "Safety instructions", Point 3.1
"Transport, Handling" and Point 6.3 "Shutting down".
11. Spare parts, Reserve pumps
11.1 Spare parts
Spare parts should be selected to last for two years of
continuous operation. If no other guidelines are
applicable we recommend that you stock the number
of parts listed below (in accordance with DIN 24296).