Carrier 40MPHA Service Manual page 33

EF (Occupancy Sensor Module Error Diagnosis and Solution)
Description: If the Occupancy Sensor module malfunctions, the LED displays the failure.
Recommended parts to prepare:
• Occupancy Sensor
Troubleshooting and Repair:
Power off.
Wait 2 minutes then restart.
Is the unit still
NO
displaying an error code? The unit is operating as designed.
YES
Check the Occupancy Sensor
module wiring.
Is it good? Ensure proper connections.
NO
YES
Replace the
Occupancy Sensor module.
33
40MPHA-03SM Specifications subject to change without notice.