Heating Troubleshooting; Gas Heating Service Analysis; Gas Heat (48Pg Units); Electric Heat (50Pg Units) - Carrier 48/50PG C03-14 Operation And Service Manual

Heating Troubleshooting

Use the unit Scrolling Marquee display or a CCN device to view
the heating status display and the heating diagnostic display (see
Appendix A) for information on the heating operation. Check the
current alarms and alarm history for any heating alarm codes and
correct any causes. (See Table 12.) Verify any unique control
configurations per installed site requirements or accessories. If
alarms conditions are corrected and cleared, operation of the heat
stages and indoor fan may be verified by using the Service Test
mode. (See Table 4.)

Gas Heat (48PG Units)

See Table 17 for general gas heating service analysis. See Fig. 21
for service analysis of the IGC board logic. Check the status LED
on the IGC board for any flashing alarm codes and correct any
causes. (See Table 18.)

Electric Heat (50PG Units)

See Table 19 for electric heating service analysis.
Table 17 – Gas Heating Service Analysis
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