Carrier 38MBRC Series Service Manual page 24

38MBRC: Service Manual
EH 60/EH 61/EH 62/ EH 65/ EC 53/EC 52/EC 54/ (Open Circuit or Short Circuit of Temperature Sensor
Diagnosis and Solution)
Description: If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED displays the failure.
Recommended parts to prepare:
• Connection wires
• Sensors
• PCB
Troubleshooting and repair:
Check the connection between
temperature sensor and PCB .
Measure the resistance value
Replace indoor PCB((E4/E5) or
NOTE: For certain models, the outdoor PCB could not be removed separately. In this case, the outdoor electric control box
should be replaced as a whole. The figure and the value above are for reference only. The actual appearance and value
may vary.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Is it properly wired ?
YES
of the sensor.
Is it within acceptable
parameters?
YES
outdoor PCB (F1/F2/F3)
NO Ensure proper connections .
NO Replace the sensor.
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