Xylem IM205 Vortex Series - Manual (Page 20)

18 Vortex Installation, Operation and Maintenance Manual
VII. Trouble Shooting
Safety
When working on the motor, make sure that the power is switched off. When working on
the pump make sure it cannot start unexpectedly. Only qualified electricians may do the
electrical work. When starting the pump ensure nobody goes near rotating parts.
PROBLEM POSSIBLE CAUSE REQUIRED ACTION CHECK POINTS
No voltage on Check power supply *No power
motor terminals *Main isolator switch
*Fuses
Check motor *Earth leakage relay
protection *Motor protection relay
Pump *Motor temperature
does not *Water detector
start Check start and *Too low water level
stop signals *Obstructed level switches
*Switches interchanged
*Control panel
Motor failure Check motor *Continuity and isolation
wiring *Phase resistance
No stop signal Check level *Float switches
Pump regulation *Control panel
does not Wrong start and Check level *Obstructed level switches
stop stop level regulation *Adjust start and stop level
*Power supply not stable
Fault in power Check power *Low voltage
supply supply *Not all 3 phases available
Pump *Setting of motor protection
starts and Motor overloaded Check pump *Wrong direction of rotation
stops *Impeller blocked
repeatedly *Protection in automatic reset mode
Motor overheated Check cooling *Continuity and isolation
Check motor *Fuses
Fault in power Check power *Low voltage
Current supply supply *Impeller blocked
too high Pump failure Check pump *Visc. or spec. gravity too high
*Wrong direction of rotation
Clogging or air lock Check discharge *Discharge obstructed
and coupling *Valve fully or partly closed
*Air pocket in pump or discharge
Pump runs *Coupling leaks
but no flow or Pump failure Check pump *Impeller or volute blocked
too low flow *Pump is sucking to much air
*Worn or broken impeller
Fault in power Check power *Control panel
supply supply *Fuses
*Low voltage
Trouble Shooting