20
Manual 1866 Rev A p/n 1866
TROUBLESHOOTING
08
Although Kinney vacuum pumps are well-designed and manufactured, problems may occur due to normal
wear and the need for readjustment. The following chart lists symptoms that may occur along with probable
causes and remedies.
SYMPTOM
PROBABLE CAUSE
REMEDIES
Machine is
switched off
by the motor
overload
Mains voltage/frequency does not correspond
with the motor data
Check by qualified electrician
Connection to motor terminal board is not correct
Motor overload is not set correctly
Motor overload is triggered too quickly
Use motor protection switch with an overload-
dependent delayed switch off that takes into
consideration the short-term excess current at start
up (version with short circuit) and overload trigger as
per VDE 0660 Part 2 or IEC 947-4)
The regulating valve is dirty so that the
permissible vacuum value is exceeded
Clean or replace the regulating valve
Pumping
capacity is
insufficient
The suction filter is dirty
Clean or replace the suction filter
The suction pipe is too long or too narrow
Check the hose or the pipe
Machine or system leaking
Check the pipework and screw connections for leaks
and to ensure that they are firmly seated
Final pressure
(maximum
vacuum) is not
reached
Machine or system leaking
Check the pipework and screw connections for leaks
and to ensure that they are firmly seated
Machine gets
too hot
Ambient or intake temperature is too high
Ensure it is being used properly
Cooling air supply is obstructed
Check to ensure ventilation air intake is not blocked
Clean ventilation slots
The regulating valve is dirty so that the
permissible vacuum value is exceeded
Clean or replace the regulating valve
The machine
makes an
abnormal noise
Deposits on the rotary claw
Clean the working space and the rotary claw
The regulating valve is vibrating
Replace the valve