BGH BV-V28W/DHN1 Service Manual page 69

2.17 P2: Suction pipe low pressure protection (For all models)
2.17.1 Digital display output
P2
2.17.2 Description
• Suction pipe low pressure protection.
• The system stops running.
• Error code is displayed on outdoor unit PCB.
2.17.3 Trigger / recover condition
• Trigger condition: Suction pressure ≤ 0.05MPa.
• Recover condition: Suction pressure ≥ 0.15MPa.
• Reset method: Resume automatically.
2.17.4 Possible causes
• Insufficient refrigerant.
• Low pressure side blockage.
Poor evaporator heat exchange.
•
Main PCB damaged.
•
69