User Guide

Voltage Checking
7
If the control voltage to the motor is below
about 20 volts, the motor may operate errati-
cally. Since this is such an easy test, perform
it first. The VZ-7 displays the AC voltage be-
tween the Hot and Com harness wires when
the VOLTAGE switch is held down. Most units
display between 21 and 29 VAC. Voltages
outside this range indicate problems that must
be investigated. The LOW VOLTS LED
flashes if the voltage is below 20 volts.
The SHORT LED flashes if a short is detected
in the motor’s electronics unit. DISCONNECT
POWER IMMEDIATELY to keep damage from
occuring. The VZ-7 has an automatic-reset
circuit breaker to attempt to minimize dam-
age. If the SHORT LED is flashing, this
breaker has tripped. You must disconnect
power to the VZ-7 to reset this breaker.
The DVD demonstrates how to test the line
voltage to the choke and motor.