Troubleshooting Table - Krautzberger MP-400 Operating Instructions Manual

Diaphragm pump MP-400
9.3

Troubleshooting table

Error
Air bubbles in the material con-
tainer
Diaphragm pump runs
unevenly
Pump does not start up
Pump works but no pressure
builds up or no suction
Pressure fluctuations during
operation or unusual running
noises
Article No. 200-0102
Cause
Suction line loose/leaking
Defective seal
Diaphragm faulty
Foreign bodies in the ball valve
or worn valve
Air is sucked in
Suction line blocked
Valve balls/valve seat soiled/
leaking
No compressed air available
Control piston not in end posi-
tion
Pressure controller faulty
Intake screen soiled
Suction hose is kinked
Valve ball/valve seat soiled
Valve blocked
Valve ball/valve seat worn
O-ring, defective
Diaphragm worn
ENGLISH
Remedy
Check intake line, tighten if
necessary
Ä Chapter 8.5
Replace seal (
'Replace valve parts'
on page 34)
Replace diaphragm (
Ä Chapter 8.6 'Replace the
diaphragm' on page 36)
Check ball valve, replace if
necessary
Check suction direction
Check intake line, clean if nec-
essary
Clean/replace valve balls/valve
Ä Chapter 8.5 'Replace
seat (
valve parts' on page 34)
Switch on and check com-
pressed air supply
Move the control piston into the
Ä Chapter 9.4.1
end position (
'Moving the control piston into
the end position' on page 40)
Replace the pressure controller
( Ä Chapter 9.5 'Replacing the
pressure controller'
on page 41)
Clean intake screen
Check suction hose
Clean valve balls/valve seat (
Ä Chapter 8.5 'Replace valve
parts' on page 34)
Clean valve, rinse pump
Replace valve balls/valve seat
Ä Chapter 8.5 'Replace valve
(
parts' on page 34)
Ä Chapter
Replace O-ring (
8.5 'Replace valve parts'
on page 34)
Replace diaphragm (
Ä Chapter 8.6 'Replace the
diaphragm' on page 36)
GB–39