Krautzberger MP-520, Operating Instructions Manual

Page: 36 / 53

8.2 Troubleshooting table
Error Cause Remedy
Air in the pressure line Suction line loose/leaking Check intake line, tighten if
necessary
Seals faulty/worn Replace seal ( Ä Chapter 7.5
‘Replace valve parts’
on page 31
)
Diaphragm faulty Replace diaphragm (
Ä Chapter 7.6 ‘Replace the
diaphragm’ on page 33 )
Diaphragm pump runs
unevenly Foreign bodies sucked in Remove the valve parts and
check for damage, replace any
parts as necessary (
Ä Chapter 7.5 ‘Replace valve
parts’ on page 31 )
Air is sucked in Check suction direction
Suction line blocked Check intake line, clean if nec-
essary
Valve balls/valve seat soiled/
leaking Clean/replace valve balls/valve
seat (
Ä
Chapter 7.5 ‘Replace
valve parts’ on page 31 )
The diaphragm pump runs
unevenly after removing the
control valve The control valve has been
installed positioned slightly to
the side after removal /
replacement Check the position of the con-
trol valve and adjust it as nec-
essary (
Ä Chapter 8.3.1
‘Replacing the pressure con-
troller’ on page 37
)
The diaphragm pump does not
start up No compressed air available Switch on and check com-
pressed air supply
Pressure controller/control
valve faulty Replace the pressure con-
troller/control valve (
Ä Chapter 8.3.1 ‘Replacing the
pressure controller’
on page 37
)
Pump works but no pressure
builds up or no suction Intake screen soiled Clean intake screen
Suction hose is kinked/leaking Check suction hose
Valve parts soiled/worn Clean or replace the valve
parts (
Ä
Chapter 7.5 ‘Replace
valve parts’ on page 31 )
Seals faulty/worn Replace seals ( Ä Chapter 7.5
‘Replace valve parts’
on page 31
)
Pressure fluctuations during
operation or unusual running
noises Diaphragm worn Replace diaphragm (
Ä Chapter 7.6 ‘Replace the
diaphragm’ on page 33 )
Operating instructions
T-Dok-397-GB-Rev.2
mail@krautzberger.com, www.krautzberger.com GB–36