Burkert Type 8750 - Manual (Page 27)

I NSTALLATION
8750 - 25
Error message on execution of the function LEAK MEAS
Display Cause of error Remedy
L.ERR 1 No admission pressure at the controller unit
(> 50 mbar). Switch on compressor before start of
leakage measurement.
L.ERR 2 Control does not fully close. Execute AUTOTUNE.
• No leakage detectable:
the difference between admission
pressure and conveyance pressure is so
low, even at slight valve opening, that no
air leak can be measured.
• The leakage characteristic must be
deactivated since the precision of air flow
control cannot be raised.
L.ERR 3
• Leakage too great:
while the valve was being opened, the
conveyance pressure did not rise. Hence
no reference points for the characteristic
could be registered.
• Make sure that the conveying pipe is
closed and the blocking air is open.
Other malfunctions
Problem Possible causes Remedy
POS = 0 (for CMD > 0 %) or Tight closure function CUTOFF Deactivate
POS = 100 % (for CMD < 100 %) has been activated inadvertently tight closure function or
PV = 0 (for SP > 0) or or no control air has been connect control air
PV = PV
⊥
(for SP > SP
⊥
) connected