Multi-Zone Technical Overview

REFERENCES
PAGE 107
ENGLISH
FLOW CHARTS
Does fan rotate smoothly?
Turn o the power supply and rotate
the fan by hand
Replace fan motor
Turn power on and operate fan
Does it run?
YES
NO
NO
YES
Is motor power voltage DC310V
generated?
Check output of fan motor connector
Replace indoor unit PCB
Is the feedback command pulse
generated?
Is motor control power DC15V
generated?
Replace indoor unit PCB
Replace indoor fan motor PCB Is feedback command voltage
1-6VDC generated?
Replace indoor unit PCB
YES
NO
NO
YES
YES
Replace fan motor
NO
YES
YES
Replace fan motor
NO