19.3 Trouble Shooting – Vacuum Relay
7. Testing the vacuum motor relay (all models)
1. Power up the machine.
2. With the vacuum switch and drive circuit
activated.
3. Test for voltage across the two large contact
terminals on the vacuum relay. It should
read 0 (zero) volts. When it is deactivated it
should measure 24+ volts.
4. If not replace the relay.
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6.
Retest for voltage across the vacuum
coil (small) terminals with the
squeegee switch and drive activated.
If the voltage is below the 18 volts,
replace the I-drive controller. If
voltage is above, continue testing the
vacuum relay in step 7.
Coil Terminals
Contact
Terminals
+
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