Operating & Installation Manual for the ES52 Engine Controller
15
2.5.3
Low Oil Pressure Switch Verification
The low oil pressure switch must be the type that opens when oil pressure is normal, and closes
on Low Oil pressure (failure condition or engine stopped).
DIP switch 6 must be set to the ON
position if you wish to enable oil verification, and set to the OFF position if oil verification
is to be disabled.
If DIP switch 6 is ON, prior to Cranking, the controller will attempt to verify
that the pressure switch is connected and operating properly by checking if the circuit is closed.
If the oil pressure switch does not work or the wire fails to make the connection, the engine will
be prevented from starting, and the ES52 will assume a ‘wait and see’ mode (indicated by a
steady Low Oil and flashing Engine Running LED). As soon as the oil pressure switch closes,
Cranking will proceed as usual. (If the engine starts, the controller will check for a Low Oil
failure condition only after the
Oil Bypass
TM
period).
Notice that if this verification was not
performed, a ‘bad connection’ of the oil switch might go unnoticed until such time as oil runs
out, and engine damage occurs!
Note:
i)
Oil circuit verification is only performed in the following conditions:
a)
On the first Cranking attempt
b)
If the engine has been previously running, and more than 5 minutes of rest
has elapsed.
ii)
If DIP switch 6 is set to the off position, the ES52 does not provide oil verification. The
ES52 goes immediately into cranking; it will then check for a low oil failure condition
after the oil bypass period has elapsed.
SW 6
Low Oil Pressure switch verification
ON
Enabled
OFF
Disabled
2.5.4
Selecting a Timer Function
The timer function is configurable from DIP switches 7 & 8. The output terminal associated with
this timer setting is terminal #12. It has four configurable functions, of which two are adjustable:
Glow Plug:
The Glow Plug timer is
adjustable from 0 - 32 seconds
. Glow Plug is a timing
function used with diesel engines. This output is energized on every Crank
attempt for a set time
prior
to cranking engine.
Choke:
The choke function is used on gasoline engines having an electric choke. The
choke output is energized 2½ seconds into the cranking cycle, but only on even
numbered Crank attempts (Exception; single crank attempt mode allows choke).
If engine speed remains above Crank Disconnect setting, Choke output is turned
off; but as soon as speed falls below Crank Disconnect, it is re-applied. This
ON/OFF regulation will continue, if necessary, as long as the
Oil Bypass
TM
period
is in effect.
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