Additional Safety Instructions; Maintenance And Service; Troubleshooting - NAKAYA PRO SP1315 Manual

EN

Additional safety instructions

In any of the following circumstances, stop the pump immediately and restart it only until the environmental conditions are improved or the problems are
solved:
- If the working current of the pump unexpectedly exceeds the rated current of the motor.
- If the pumping amount is abnormal, water is intermittently pumped with increased sediment concentration.
- If the insulation resistance of the motor is less than 0.5 MO.
- If the unit has obvious noise with intensified vibration.
- If the grid voltage is seriously inadequate and the protection mechanism of the motor is frequently started.
- If one phase of the fuse is burnt out.
- If the water pipeline is damaged.

Maintenance and service

Before repairing and servicing, make sure that the pump is flushed with clean water, after disassembling the pump, flush the over-current parts with water.
- The normal operation of the pump should be checked at least once a year. If the liquid pumped is turbid or the sediment concentration is large, shorten the
time intervals of checking the pump.
- The following points should be checked:
• Energy consumption: If there is anomaly, check if the circuit is significantly increased.
• Oil condition: If the oil contains water, it will be as grey as milk, there may be a leakage of mechanical seal.
• Cable: Make sure that the cable is still sealed without obvious bending or shrinking.
• Over-current components of the pump: Check if the impeller or pump housing is worn.
• Bearing: Check if the bearing is damaged or its rotation becomes inflexible.

Troubleshooting

Make sure that the power is turned off before uncovering the junction box of the motor and disassembling the pump.
PROBLEM
The pump does not deliver:
The motor does not start
The pump does not deliver:
The motor starts
The pump delivers in reduced capacity
The pump stops after brief periods of operation
The incorporate overload switch is tripped
6
CAUSE
No electricity
Plug not inserted correctly
Automatic switch tripped
Fuses burnt out(three-phase pump)
Overload protection tripped
Amperometric protection tripped
Intake flange obstructed
Delivery pipe clogged
Check valve jammed
Water level too low
Intake flange partially obstructed
Clogging in delivery pipes
Incorrect rotation direction
Foreign bodies prevent the pump from rotating
freely
Liquid temperature too high
Internal defect
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REMEDY
Automatically resets after the motor has cooled
(single-phase version)
The micro-circuit breaker resets automatically
Check rotation direction