Maxitrol Mertik GV60, Advanced Troubleshooting

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TEST: Test the drop-out voltage by taking a mV reading at
the yellow terminal.
PROCEDURE: Connect “+” test probe on yellow wire.
Connect “-” test probe to ground,
e.g. valve body or appliance chassis.
Monitor voltage after you extinguish pilot.
Note the voltage at the time you hear the
electromagnet drop out. You will hear a “clunk”.
Simultaneously count the number of seconds
from the time when the pilot is extinguished
until the electromagnet drops out.
RESULT: The pilot should drop out at 1.5 – 3 mV.
Troubleshooting the GV60
Testing the Electronics
Connect “+”
test probe on
yellow wire.
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