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OPERATING AND MAINTENANCE MANUAL
SERIE WQ
9
shall be 0.2MPa. It is ok if no leakage found within 3 minutes.
3. If the pump will not be used for a long time, Remove it from the water, and run it in clean water
for several minutes to clean its inside and outside. Then dry and do antirust treatment. If neces-
sary, repaint it.
5. TROUBLE SHOOTING
TROUBLE
CAUSE
SOLUTION
Diffi cult to start
1. Voltage too low
2. Phase lost
3. Impeller stuck
4. Cable too thin
5. Stator winding burnt
1. Adjust Voltage to 0.9-1.1 times
of the rated range.
2. Check the wire in the switch and
cable.
3. Clean the impeller.
4. Use the proper cable.
5. Rewind or replace.
Low capacity
1. head too high.
2. Strainer or inlet clogged.
3. Impeller worn out.
4. Submersion too shallow or air
sucked in.
5. Impeller runs in reverse direction.
1. Use in the head range.
2. Clean the inlet or Strainer.
3. Replace the impeller.
4. Keep enough submersion depth.
5. Swap any two of the phases.
Unexpected
stop
1. Protector Works
2. Impeller stuck
3. Stator winding burnt
1. Check the protector.
2. Clean the impeller.
3. Rewind or replace.
Stator winding
burnt
1. Run too log time with phase lost.
2. Short circuit in winding or between
phases due to leakage.
3. Impeller stuck
4. Pump starts too frequently.
5. Pump runs overloaded.
1. Rewind or overhaul
2. Solve the problems with mecha-
nical seal.
3. Clean the impeller.
4. Use in proper way.