Midea V6R VRF Series Service Manual page 120

2.16 H8: High pressure sensor error
Digital display output
Description
 High pressure sensor error.
 All units stop running.
 Error code is displayed on the unit with the error.
Trigger / recover condition
 Trigger condition: Discharge pressure ≤ 0.3MPa and T4 ≥ -10℃ for a consecutive of 20s or
Discharge pressure ≤ 0.3MPa and compressor operates for a consecutive of 20s
 Recover condition: Does not meet the above conditions.
 Reset method: Resume automatically.
Possible causes
 Outdoor unit stop valves are closed.
 Pressure sensor not connected properly or has malfunction.
 Insufficient refrigerant.
 Low pressure side blockage.
 Poor evaporator heat exchange.
 Outdoor main PCB damaged.
V6R VRF 50Hz
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