Carrier 38VMH-1P Service Manual page 38

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E4: TEMPERATURE SENSOR (T3 OR T4) ERROR
DEFINITION
The temperature sensor (T3 or T4) on main board is short or damaged.
(i.e. The test voltage > 4.95V or < 0.05V)
POSSIBLE CAUSES
• The temperature sensor is located at wrong place
• Loose connection at port on main control board
• Damaged sensor (resistance drift)
• Interference of other heat sources
• Damaged main board
A210279
Fig. 44 —E4 Troubleshooting Chart
* A Refer to resistance temperature sensor in Appendix A.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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