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Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
44
P2: LOW PRESSURE PROTECTION
DEFINITION
Low pressure switch is activated for pressure ≤ 20psi
POSSIBLE CAUSES
• Stop valve is closed
• The heat exchanger is dirty or blocked
• Insufficient refrigerant in the system
• Damaged main board
• Low pressure resulted by refrigerant blocked on high pressure zone due to the damaged valve of IDU or ODU
A210286
Fig. 51 —P2 Troubleshooting Chart
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