Woodward 1502ES, Руководство по устранению неисправностей

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Manual 36541 Solenoid Troubleshooting Guide
Woodward 19
Table 6. Solenoid Voltage
Step Action Response
1
Check pull-
in voltage
available to
solenoid
during
cranking
Attach the clips of a voltmeter to
the Pull and Common wires in
the harness. Hold the run/stop
lever in the stop position. Turn
the key Switch to “Start” and
crank the engine for a few
seconds until you get a steady
reading on the meter.
The voltage must be a
minimum of 75% of rated
voltage.
If the voltage is below these
values (10 Vdc for 12 Vdc units
and 20 Vdc for 24 Vdc units),
the solenoid may not pull in.
2
Check the
hold-in
voltage
available to
the solenoid
during
cranking
Attach the clips of a voltmeter to
the Hold and Common wires in
the harness. Hold the run/stop
lever in the stop position. Turn
the Key Switch to “Start” and
crank the engine for a few
seconds until you get a steady
reading on the meter.
The voltage must be a
minimum of 75% of rated
voltage.
If the voltage is below these
values (10 Vdc for 12 Vdc units
and 20 Vdc for 24 Vdc units),
the plunger will not hold in at
the moment cranking stops
and the Key Switch is released
to the “Run/On” position.
3
Check the
hold-in
voltage
available to
the solenoid
when NOT
cranking
Attach the clips of a voltmeter to
the Hold and Common wires in
the harness. Turn the Key
Switch to “Run/On” and check
the voltage. Check continuity
between the “Start” and “On”
positions on the key switch.
The voltage must not be below,
and must remain at, a
minimum of 75% of rated
voltage.
If the voltage is below these
values (10 Vdc for 12 Vdc units
and 20 Vdc for 24 Vdc units),
the plunger will not hold in.
4
Check the
voltage
between the
Pull and
Common
wires when
NOT
cranking
Attach the clips of a multimeter
to the Pull and Common wires in
the harness and check the
voltage.
There should NOT be any
voltage because the Pull-in coil
is only energized when the Key
Switch is in the “Start” position.
If there is a voltage reading,
disconnect the solenoid to
prevent burn-out. Inspect
application wiring to locate the
problem.
NOTE
Remember to limit cranking to three 30-second attempts with a
cool-down period of two minutes (120 seconds) between each
cranking attempt. After three cranking attempts, the solenoid must
be allowed to cool down to ambient temperature (5½ minutes total
elapsed time) before any further attempts are made.