Carrier 38VMH-1P Service Manual page 41

Outdoor units for variable refrigerant flow vrf heat pump system
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E7: DISCHARGE TEMPERATURE SENSOR (T5) ERROR
DEFINITION
• The temperature sensor (T5) is short or damaged.
• Test voltage > 4.95V or < 0.05V.
POSSIBLE CAUSES
• The temperature sensor is installed in the wrong place
• Loose connection at post on main control board
• Damaged sensor (resistance drift)
• Interference of other heat sources
• Damaged main control board
A210282
Fig. 47 —E7 Troubleshooting Chart
*B Refers to resistance of temperature sensor in Appendix.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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