User Guide

Installation & Operation Manual - VFH-MB 09/12/18/24 Series

Malfunction of Blocked Protection of IDU Fan Motor H6

interface terminal 2 and 4

interface terminal 1 and 2 within

Spin the blade by

hand with power

disconnected

Does the blade

operate

smoothly?

Replace the main

board with the

same model

Replace the main

board with the

same model

Test whether the voltage

between motor interface

terminal 2 and 3 is 15VDC

Replace the

motor

Replace the main

board with the

same model