Midea Mini C Series Service Manual page 67

Mini C Series VRF 50/60Hz
2.16 P1: Discharge pipe high pressure protection (for 100~160 model)
2.16.1 Digital display output
P1
2.16.2 Description
 Discharge pipe high pressure protection.
 The system stops running.
 Error code displayed on the outdoor unit PCB.
2.16.3 Trigger / recover condition
 Trigger condition: Discharge pressure ≥ 4.4MPa.
 Recover condition: Discharge pressure ≤ 3.2MPa.
 Reset method: Resume automatically.
2.16.4 Possible causes
 Pressure sensor/switch not connected properly or has malfunctioned.
 Excess refrigerant.
 System contains air or nitrogen.
 High pressure side blockage.
 Poor condenser heat exchange.
 Main PCB damaged.
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