User Guide

Analysis (continued)
2) Attach the ZebraStat’s component lead’s
alligator clips to the appropriate equipment
wires, then attach the Red and Blue power
leads to the equipment’s 24VAC hot and com-
mon wires, observing polarity.
3) Notice which yellow LED’s are illuminated
under their component switches. (All of the
component switches
must be OFF.) These
LED’s indicate which circuits are currently re-
ceiving power. Technicians often use this fea-
ture to troubleshoot: (a) cross-wired thermo-
stat wires (for instance, if the condensing unit
starts when the fan switch is activated on the
thermostat) or; (b) shorted thermostat wires
(for instance, if the two cooling stages start
simultaneously when only one is being called
for; or a continuously operating fan).
NOTE:
Many thermostats pre-connect FAN & COOL
leads when set to ‘Cool’ mode, etc.
4) Manipulate the thermoat’s switches and
observe the results on the
ZebraStat to verify
that all functions are working properly.
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