Wiring Diagrams; Troubleshooting - Carrier 58CTA Installation And Service Instructions Manual

control begins a normal inducer post-purge period and the
blower switches to COOL speed after a 3 second delay. If the
R-to-W/W1-and-Y/Y2-and-G or R-to-W/W1-and-Y1-and-
Y/Y2-and-G signals disappear at the same time, the blower
motor BLWM will remain on for the selected blower-OFF
delay period. If the R-to-W/W1-and-Y/Y2 or R-to-W/W1-
and-Y1-and-Y/Y2 signals disappear, leaving the G signal, the
blower motor BLWM will remain on for the selected blower-
OFF delay period then switch to continuous-blower speed.
Step 4—Wiring Diagrams
Refer to wiring diagram, Fig. 56.
Step 5—Troubleshooting
Refer to the service label. (See Fig. 55—Service Label.)
The Troubleshooting Guide can be a useful tool in isolating
furnace operation problems. Beginning with the word "Start,"
answer each question and follow the appropriate arrow to the next
item.
The Guide will help to identify the problem or failed component.
After replacing any component, verify correct operation sequence.
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