SKF LINCOLN Centro-Matic P653S Serie Instrucciones De Uso Y Mantenimento página 20

Display of holding time.
Display is indicating holding times when
pump reaches preset pressure.
Malfunctions
• If there is no feedback from pressure
switch or pressure transducer within
12 minutes of pumping time, pump
switches off immediately. One of the fault
signals E1 to E4 († Error, Fig. 21 to
26, page 21) will be shown flashing in
display of membrane keypad.
NOTE
If malfunction is present, E1, E2, E3 or E4 will
be flashing. Pump does not switch on
automatically any longer. It can only be
triggered via an additional lubrication cycle.
Furthermore, a change to programming
mode is not possible while in alarm.
Fig. 20
Display of malfunction E1, failure to build
pressure at pump.
E1 fault is a failure to build pressure at
pump.
• If either pressure switch or pressure
transducer fails to actuate within
12 minutes of pumping, this fault will
occur.
Display of malfunction E2, failure to build
pressure at end of line.
E2 fault is a failure to build pressure at the
end of the supply line. You must use an
external pressure switch or pressure
transducer to detect this.
• If either external pressure switch or
pressure transducer fails to reach
2 500 psi (172 bar) within 12 minutes of
pumping, this fault will occur.
Fig. 21
E3 fault is failure to vent at pump.
• Failure of internal pressure switch to open
• Failure of internal pressure transducer to
Fig. 22
• If at the end of the pause time internal
E4 fault is failure to vent at the end of the
supply line. Must use external pressure
switch or pressure transducer to detect this.
• If at the end of the pause time external
• If at the end of the pause time external
20
Display of malfunction E3, failure to vent
at pump.
during 10 seconds that pump motor
reverses to locate the vent position.
drop 900 psi (62 bar) below P7
parameter (P7 minus 900 psi (62 bar))
during 10 seconds that pump
motor reverses to locate vent position.
pressure transducer has not dropped
below 900 psi (62 bar), an E3 fault
will occur.
Display of malfunction E4, failure to vent
at end of line.
pressure switch has not opened, an E4
fault will occur.
pressure transducer has not dropped
below P8 parameter, E4 fault will occur.
Fig. 23
Fig. 24