0E4: T3 Or T4 Temperature Sensor Error - Carrier 38VMA Series Service Manual

Outdoor unit for variable refrigerant flow (vrf) heat pump system
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c. 0E4: T3 or T4 Temperature Sensor Error
1.
Error display:
ODU display: 0E4
2.
Applicable models:
38VMA***HDS5-1 (208/230V-3Ph-60Hz)
38VMA***HDS6-1 (460V-3Ph-60Hz)
3.
Error definition and inspection:
The temperature sensor (T3 or T4) on main board is short or damage. The test voltage should be > 4.95V or < 0.05V.
4.
Possible causes:
Loose connection at port on main control board
Damaged sensor
Damaged main board
*A Refers to Resistant of Temperature sensor in Appendix.
45

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