CP Close-coupled centrifugal pumps troubleshooting

Unusual phenomenon	Malfunction Routine/Cause	Solutions
Pump is not working	No voltage or power is off.	Re-starts the power
	Cable wire is fractured	Replaces it
	Fuse or circuit burns up	Replaces it
	Power source has poor contact	Re-connects it again.
It has a little noise, but not working.	Switch has poor contact that cause open phase	Adjusts connection parts.
	Cable wire is fractured that cause open phase	Replaces it
	Motor wiring is fractured that cause open phase	Replaces it
	Bearing is defective	Replaces it
	Motor shaft is not balanced	Replaces it
	Single phase capacitor is defective	Replaces it
	Generator capacity is not enough	Replaces it to larger capacity
	Voltage drops	Adjusts power & voltage
	Something stuck inside the pump	Dismantles the pump and cleans it.
When pump starts, it will stop immediately.	Voltage drops	Adjusts power & voltage
	Generator capacity is not enough	Replaces it to larger capacity
	3 phase voltage is unstable	Adjusts power; replaces impeller
	Liquid contains mud or sand	Negotiates with customer
	Liquid viscosity is too high	Negotiates with customer
	Liquid temperature is too high	Negotiates with customer
	Reverse phase in 3 phase	Replaces 2 wires in 3 phase wires.
The capacity is not enough or the head is low	Impeller is stuck or damaged	Cleans or replaces it
	Motor reverse phase	Replaces 2 wires in 3 phase wires.
	Pipeline or valve is leaking or stuck	Checks where the leakage is in pipeline or valve
	Actual performance can’t reach customer requirements	Replaces it to better pump model