Carrier 38MARBQ12AA1 Service Manual page 41

DIAGNOSIS AND SOLUTION (CONT)
Indoor Temperature Sensor Is an Open Circuit or a Short Circuit (T1, T2) (EH60)
Description: If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED displays the failure code.
Recommended parts to repair:
• Connection wires
• Sensors
• Indoor main PCB
Troubleshooting
Check the connection between
the temperature sensor and PCB.
Is it properly wired? NO Ensure proper connections.
YES
Measure the resistance value
of the sensor.
Is it within
NO Replace the sensor.
acceptable parameters?
YES
Replace the indoor main PCB.
Fig. 40 — Test
NOTE: Figure 40 and the value shown within are for reference only.
41
SG-38MARB-01 Specifications subject to change without notice.