H6 Dc Fan Error - Toyotomi KURO Mini Service Manual

TOYOTOMI
Troubleshooting：
3.4.20 ―H6‖ DC Fan Error
Error display: ODU mainboard, IDU wired control and IDU receiver light board will display
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.
H5
IPM protection
Compressor 3-phase wire connection is
lack of phase or phase -reversing?
NO
System is heavy-loaded? Compressor
current is too large?
NO
Error still exists?
U-Match 5 SERIES UNIT SERVICE MANUAL
YES
Connect wires according to
the phase sequence.
YES
Normal protection
Replace the drive board .
YES
Replace the compressor .
58
H6