Problems And Solutions - Graco 127642 Manuel D'instructions

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PROBLEMS AND SOLUTIONS

For any problems contact the authorised dealer nearest to you.
PROBLEM POSSIBLE CAUSE
Lack of electric power
THE MOTOR IS NOT
Rotor jammed
TURNING
Motor problems
THE MOTOR TURNS Low voltage in the electric
SLOWLY WHEN START- power line
ING
Low level in the suction tank
Foot valve blocked
Filter clogged
Excessive suction pressure
High loss of head in the
delivery circuit (working with
the by-pass open)
By-pass valve blocked
LOW OR NO FLOW
RATE
Air entering the pump or the
suction piping
A narrowing in the suction
piping
Low rotation speed
The suction piping is resting
on the bottom of the tank
Cavitation occurring
Irregular functioning of the
INCREASED PUMP
by-pass
NOISE
Presence of air in the flui
LEAKAGE FROM THE Seal damaged
PUMP BODY
Suction circuit blocked
Malfunction of foot valve
fit ed on suction circuit
THE PUMP DOES NOT
PRIME THE LIQUID
The suction chambers are dry Add liquid from pump
The pump chambers are dirty
or blocked
M0307
CORRECTIVE ACTION
Check the electrical
connections and the safety
systems.
Check for possible damage
or obstruction of the rotating
components.
Replace Unit
Bring the voltage back within
the anticipated limits
Refill the tan
Clean and/or replace the valve
Clean the fil er
Lower the pump with respect
to the level of the tank or
increase the cross-section of
the piping
Use shorter piping or of
greater diameter
Dismantle the valve, clean
and/or replace it
Check the seals of the
connections
Use piping suitable for
working under suction
pressure
Check the voltage at the
pump. Adjust the voltage and/
or use cables of greater cross-
section
Raise the piping
Reduce suction pressure
Dispense until the air is
purged from the by-pass
system
Verify the suction connections
Replace Unit
Remove the blockage from
the suction circuit
Replace foot valve
delivery side
Remove the blockages from
the suction and delivery valves
EN
15