Toro 04384 Service Manual page 170

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CONNECTOR
LEAK DETECTOR CIRCUIT
Components can be tested by isolating them from the
rest of the circuit and individually testing the suspected
component.
Delay Timer
This is a solid state device with no moving parts. Upon
the application of power, the time delay is initiated. At the
completion of the one (1) second delay, the audio alarm
becomes energized. When power is removed, the timer
is reset.
1. Isolate timer from the circuit. Connect 12VDC source
in series with voltmeter to connector of timer. Make sure
to observe polarity.
2. The voltmeter should jump from 0 to 12VDC after the
one (1) second delay. Remove voltage source from the
timer. Reconnect timer to the circuit.
Audio Alarm
1. Isolate alarm from the circuit. Connect 12VDC
source to terminals. Make sure to observe polarity.
2. Alarm should sound. Remove voltage source from
the alarm. Reconnect alarm to the circuit.
Electrical System
RED/WHITE
VALVE SOLENOID
TEST SWITCH
LEVEL SWITCH
BLACK/WHITE
Figure 41
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BLACK
AUDIO ALARM
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270 OHM
RESISTOR
6
1
4
Figure 42
1. 270 ohm resistor
2. Audio alarm
3. Delay timer
Valve Solenoid Coil
1. Isolate solenoid coil from the circuit. Connect multi-
meter (Ohms setting) to solenoid coil connector. Make
sure to observe polarity.
2. Resistance of solenoid coil should be approximately
7.2 ohms.
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1 SEC.
DELAY
TIMER
BLACK
5
3
2
4. Toggle switch
5. Level detector
6. Valve solenoid
Greensmaster 3250--D