Midea MV6-R335WV2RN1 - 2.19 P1: High pressure protection; 2.19.1 Digital display output; 2.19.2 Description; 2.19.3 Trigger recover condition

V6R VRF 50Hz
124
Midea
V6R
Series Service Manual
2.19 P1: High pressure protection
Digital display output
Description
 All units stop running.
 Error code is displayed on the unit with the error.
Trigger / recover condition
 High pressure sensor protection
 Trigger condition: Discharge pressure ≥ 3.9 MPa.
 Recover condition:
 Cooling Only/Main Cooling Discharge pressure < 3.5MPa and Restart permission=ON.
 Heating Only/Main Heating Discharge pressure < 3.1MPa and Restart permission=ON.
 Reset method: Resume automatically.
 Discharge pressure switch protection
 Trigger condition: Discharge pressure ≥ 4.0 MPa.
 Recover condition: Discharge pressure < 3.0MPa.
Possible causes
 Outdoor unit stop valves are closed.
 Pressure sensor/switch not connected properly or has malfunction.
 Excess refrigerant.
 System contains air or nitrogen.
 High pressure side blockage.
 Poor condenser heat exchange.
 Outdoor main PCB damaged.