MAKINEX DPW-4000, Operator'S Manual

Page: 38 / 58

Page 38 of 56
TROUBLESHOOTING
TROUBLE SHOOTING GUIDE
PROBLEM CAUSE REMEDY
Pump does not reach the
specified pressures
Pump sucking air Restore the tightness of the intake line
Intake flow rate insufficient
Increase the size of the intake pipelines
Remove and kinks from the pipes
Increase the filter capacity or clean the
filter cartridge
Increase the RPM to the rated speed
Worn intake and delivery valves Replace the valves (1)
By-pass valve seat worn Replace the valve
Worn gaskets Replace the gaskets (1)
Unsuitable, worn nozzle Replace nozzle
Faulty Gauge Check and Replace
Irregular variations in
pressure
Worn intake and delivery valves Replace the valves (1)
Valves blocked by dirt Clean the valves (1)
Air being sucked into system
Restore the tightness of the intake
pipeline connections
Worn gaskets Replace the gaskets (1)
Fluctuating pressure
Valves worn Check and replace
Valves blocked Check and replace
Pump sucking air
Check water supply and air ingress at
joints in suction line
Worn piston packing Check and replace
Pressure drop
Nozzle worn Replace Nozzle
Worn intake and delivery valves Replace the valves (1)
Valves blocked by dirt Clean the valves (1)
By-pass valve seat worn Replace the valve
Worn gaskets Replace the gaskets (1)
Pump noisy
Air being sucked into system
Restore the tightness of the intake
pipeline connections
intake and/or delivery valve
springs broken or collapsed
Replace the valves (1)
Valves blocked by dirt Clean the valves (1)
Worn bearings Replace the bearings (1)
Intake liquid temperature too high Reduce liquid temperature
Pump overheating
High pump operating pressure Reduce the pressure to the rated values
Not enough water flowing
through
Check water inflow through pump
Pump left on Idle for too long
DO NOT LEAVE PUMP ON IDLE FOR
>2min VOIDS WARRANTY!