23
PROBLEM
CAUSE
REMEDY
Dosing pump not delivering
or output too low
Suction valve leaking or blocked
Clean or replace suction valve
Suction pipe leaking or blocked
Replace suction pipe
Air bubbles into pump head or into suction
pipe
Prime the pump as described in “5.1 How
to prime the pump” page 20
Viscosity too high
Increase the pipe diameter or contact
manufacturer
Suction lift too high
Decrease lift
Foot filter obstruction
Clean the foot filter
Motor and pump head
too hot
Wrong wiring or defecting contact
Check wiring
Pressure too high
Install a valve
Delivery pipe obstructed or blocked
Clean delivery pipe
Low level oil
Refill oil
Liquid loss
Plunger o-ring damaged
Contact manufacturer for replacement
If the problem can not be solved, please contact after-sales service or return the dosing pump to the manufacturer.
7. TROUBLESHOOTING
Tab. 11.
Guide to troubleshooting.
Before return the dosing pump to the manufacturer Repair service
,
drain the chemical
from pump head and rinse it.
If there is the possibility that residual corrosive liquid into pump head could cause
damages, declare it on REPAIR FORM.
Remove oil and replace operating cap with the blind cap.
Complete the PRODUCT SERVICE REPAIR FORM and send it with the dosing pump.
Repair service is not accepted if PRODUCT SERVICE REPAIR FORM is missing.
7.1 Repair
service
