0P5: High Temperature Protection For Pipe Temperature - Carrier 38VMA Series Service Manual

u. 0P5: High Temperature Protection for Pipe Temperature
1. Error display:
ODU display: 0P5
2. Applicable models:
38VMA***HDS5-1 (208/230V-3Ph-60Hz)
38VMA***HDS6-1 (460V-3Ph-60Hz)
3. Error definition:
Error is reported when the maximum value registered by the tube temperature sensor (T3) on the main board is > 149°F,
(normal value for T3 < 131°F).
4. Possible causes:
•
High temperature for the refrigerant in the system
•
Misjudgment caused by resistance drift of sensor
•
Damaged main board
•
Sensor affected by other nearby heat sources
*A Refer to Resistant of Temperature sensor in Appendix.
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