GREE U-Match 5 SERIES UNIT SERVICE MANUAL
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Troubleshooting：
3.4.20 “H6” DC Fan Error
Error display: ODU mainboard, IDU wired controller and IDU receiver light board will display H6
Error judgment condition and method:
Mainboard doesn’t receive the signal of outdoor fan within 30s after the outdoor fan starts up.
Possible reason:
■Outdoor fan wiring terminal is not correctly connected to the mainboard.
■Outdoor fan is damaged.
■If it is a new unit or a new motor has been replaced in the unit and the wire connection is correct, then probably
it is the program that goes wrong.
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