Carrier 58MVP Troubleshooting Manual page 31

STEP
Turn power off, wait 30 sec, then restore power. Reset thermostat. Observe op-
11. eration of furnace through 1 cooling cycle.
NOTE: Blower access panel must be in place.
12. Does Fault Code 44 occur?
You have excessive restriction in air delivery system. Check filter(s) and duct-
work. Furnace blower will operate in cooling mode at default speed. Check out-
13.
door unit suction pressure and verify charge to determine if indoor airflow is suf-
ficient. If not, refer to Appendix E to evaluate.
Turn power off, wait 30 sec, then restore power. Reset thermostat. Observe op-
14. eration of furnace after it goes into high fire.
NOTE: Blower access panel must be in place.
15. Does unit operate in high fire while flashing Fault Code 44?
You have excessive restriction in air delivery system. Check filter(s) and duct-
work. Furnace blower will operate in high-fire speed at 1200 RPM. Check tem-
16.
perature rise of furnace and make sure unit does not trip primary limit. If it does,
refer to Appendix E to evaluate.
CLEANUP AND START-UP INSTRUCTIONS
1. Start furnace using procedure outlined on Lighting Instruc-
tions attached to furnace. Observe operation of furnace
through at least 1 complete heating cycle controlled from
room thermostat. Observe each cycle for 20 minutes or until a
fault code is flashed. If a fault occurs, refer to the Index.
2. Recycle as necessary and check thermostat heat anticipator
setting, gas input rates, and temperature rises. These proce-
dures are outlined in Installation, Start-Up, and Operating
Instructions.
3. Check operation of safety devices: pressure switches, limit
switch, and flame roll out switch.
4. Put setup switch SW-1 in ON position and jumper R, W/W1,
and Y/Y2 terminals on furnace control board simultaneously
to clear fault history.
5. Put setup switch SW-1 in OFF position.
6. Put all setup switches in their proper positions.
7. Remove tape from the door switch.
8. Replace thermostat leads (if necessary).
9. Set thermostat in AUTO position, calling for heat.
10. Set thermostat to desired temperature.
11. Replace blower access panel and main furnace door. Clean up.
31
YES NO GO TO
— — 12
13 14 —
— — 10
— — 15
16 7 —
— — 10