GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
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Troubleshooting:
2.2.4.98 “L1” Indoor fan protection
Error display:
IDU wired controller and IDU receive light board will display
Error judgment condition and method:
Check if the rotation speed of IDU is too slow, or it stops rotation, or protection signal of outdoor fan
is transferred. If yes, it is judged that indoor fan protection occurs.
Possible reason：
■Motor stops operation or it is blocked
■IDU mainboard is abnormal
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