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WSM U15-3
3. Auto glow controller
(C/N RC417-53791)
1) If the automatic glow controller seems to malfunc-
tion, take it out of the machine, as shown at left,
and check the performance of the controller itself
referring to the circuit diagram below.
2) The circuit diagram below shows the actual con-
nections. In practice, apply the battery voltage
between the coupler pin 3, and ground the coupler
pin 4.
3) When the coupler pins 5 and 6 are connected as
shown in the diagram, the glow lamp stays on for a
certain period of time, and the relay gets activated,
it means that the automatic glow controller func-
tions well.
4) If the water temperature sensor signal is not fed to
the coupler pin 2, the controller will be in action for
about 12 seconds the same way as for the -20 °C
condition.
Auto glow controller
Note : If a test-purpose glow lamp is not available, set the
circuit tester to the V range and watch the tester's
pointer movement.
6
4
12 seconds: Without temp. sensor
Circuit diagram to test
3
II-140
Glow relay
Glow lamp
Water temp. sensor
2
1
4
6
5
3
6
4
2
With temp. sensor
Key SW
Battery
3
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