Many Tech's have some confusion about X-Motors and Systems - and no wonder - with as many as 10 wires going to these new motors, you can't just use a voltmeter anymore for proper diagnosis.
The current generation of tools can help, but fall far short of giving the Tech complete information on why a system isn't operating correctly.
The VZ-6 is simple to operate; but don't let the simplicity fool you. At its heart are circuits and displays that take the guesswork out of "what's wrong?" when you're called to repair a malfunctioning X-Motor or ECM 142 Motor System. With it, you will be able to:
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Visually monitor all speed signal calls from the furnace/air handler circuit boards.
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Interrupt those signals - and send the speed calls you desire - to observe motor operation
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Get a 3 LED readout of the control voltage in the motor (OK, Questionable, or Low)
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And finally, IF a problem is traced to the motor, a special "Winding Test" circuit analyzes the motor for shorts, opens, and frame shorts, advising you if the motor itself needs replacement or if the Electronics Module is at fault (much less expensive, if one is separately available).
GE, who makes a large majority of these motors, reports that 41% of the motors returned to their factory actually have
"no problem found". That means someone made an expensive mis-diagnosis; it also means the real problem has not been corrected by replacing the motor. Almost any mistake in diagnosis on an ECM system will cost the Tech (or his customer) much more than this tool does!
Two DVD's are included; one that teaches Variable Speed System Theory, the second instructs the Tech how to use the VZ-6 to troubleshoot X-Motor systems.
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