Midea MV5-X252W/V2GN1 - 4.10 H2, H3 Troubleshooting; 4.10.1 Digital display output; 4.10.2 Description; 4.10.3 Possible causes

V5 X VRF 50/60Hz
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Midea V5 X Series Service Manual
4.10 H2, H3 Troubleshooting
Digital display output 4.10.1
Description 4.10.2
 H2 indicates that the number of slave units detected by master unit has decreased.
 H3 indicates that the number of slave units detected by master unit has increased.
 All units stop running.
 Error code is only displayed on the master unit.
Possible causes 4.10.3
 Some outdoor units are powered off.
 Power supply abnormal.
 Incorrect outdoor unit address setting.
 Communication wires between outdoor units not connected properly.
 Loosened wiring within electric control box.
 Damaged main PCB or electric control box communication terminals block.