V4+R VRF 50/60Hz
201608 67
Part 5 - Diagnosis and Troubleshooting
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.