Carrier 38VMH-1P Service Manual page 43

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P1: HIGH PRESSURE PROTECTION
DEFINITION
High pressure switch is activated for pressure > 638 psi.
POSSIBLE CAUSES
• Stop valve is closed
• The heat exchanger is dirty or blocked
• Excess refrigerant in the system
• Damaged main board
• Damaged high pressure sensor
• Refrigerant is blocked in high pressure zone
A210285
Fig. 50 —P1 Troubleshooting Chart
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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