Midea V6R VRF Series Service Manual page 122

2.17 Hb: Low pressure sensor error
Digital display output
Description
 Low pressure sensor error.
 All units stop running.
 Error code is displayed on the unit with the error.
Trigger / recover condition
 Trigger condition: The main control board cannot receive the feedback signal of low pressure sensor.
 Recover condition: The main control board can receive the feedback signal of low pressure sensor.
 Reset method: Resume automatically.
Possible causes
 Outdoor unit Low gas stop valves are closed.
 Pressure sensor not connected properly or has malfunction.
 Outdoor main PCB damaged.
V6R VRF 50Hz
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