SKF LINCOLN Centro-Matic P653S Serie Instrucciones De Uso Y Mantenimento página 13

Pressure control/hold
time/vent cycle
Pump with internal
pressure switch only
Internal pressure switch will close at
3 500 psi (240 bar) and open at
2 600 psi (179 bar).
After pump starts a lubrication cycle,
motor stops when pressure at pump reaches
preset pressure of 3 500 psi (240 bar).
Pump will go through two holding periods,
H1 and H2.
Holding time (H1)
• Internal pressure switch must stay closed
for 15 consecutive seconds before going to
H2. If internal pressure switch opens
during 15 seconds, pump will restart and
run until internal pressure switch closes.
Holding time (H2) – will last
for 30 seconds
• At end of 30 seconds, if internal pressure
switch is closed, pump will begin a vent
cycle.
• If at the end of 30 seconds internal
pressure switch is open, pump will restart
and run until internal pressure switch
closes. When it closes a vent cycle will
take place.
• If at the end of 30 seconds internal
pressure switch is closed, but during H1
hold time internal pressure switch did
open, pump will restart and pump for
2 seconds before vent cycle begins.
Possible faults
• E1 Fault – a failure to build pressure at
pump within allotted 12 minutes of
pumping time.
• E3 Fault – a failure to vent at pump.
Internal pressure switch has 10 seconds to
open when motor reverses to
locate vent position.
Pump with internal
and external
pressure switch
Internal pressure switch will close at
3 500 psi (240 bar) and open at
2 600 psi (179 bar. External pressure switch
will close at 2 500 psi (172 bar) and open at
1 900 psi (131 bar).
After pump starts lubrication cycle,
motor stops when pressure at pump reaches
preset pressure of 3 500 psi (240 bar).
Pump can go through three holding periods,
H1, H2 and H3.
Holding time (H1)
Internal pressure switch must stay closed for
15 consecutive seconds before going to H2.
If internal pressure switch opens during
15 seconds, pump will restart and run until
internal pressure switch closes.
Holding time (H2) – will last
for 30 seconds
• At the end of H2, if internal pressure
switch is closed and external pressure
switch is closed, pump will begin
vent cycle.
• At the end of H2, if internal pressure
switch is open or both internal and
external pressure switches are open, an
H3 will appear on the display. Pump will
turn on again and pump until internal
pressure switch is closed. When both
internal and external pressure switches
are closed vent cycle will take place.
• If at the end of H2 internal pressure switch
is closed but external pressure switch is
open, pump will turn on for 2 seconds and
then stop and wait until external pressure
switch closes. H3 will appear on display.
When both internal and external pressure
switches are closed, vent cycle will take
place.
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Holding time (H3)
• Holding time H3 will remain until both
internal and external pressure switches
are closed and then vent cycle will take
place. If both pressure switches do not
close within allotted pumping time of
12 minutes, alarm will occur. If internal
pressure switch opens during H3, it will
repump until internal pressure switch
closes.
Possible faults
• E1 Fault – a failure to build pressure at
pump within allotted 12 minutes of
pumping time.
• E2 Fault – a failure to build pressure at the
end of the supply line.
• E3 Fault – a failure to vent at pump.
Internal pressure switch has 10 seconds to
open when motor reverses to locate vent
position.
• E4 Fault – a failure to vent at the end of
the supply line. External pressure switch
must be open before next lube cycle
takes place.