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10. Indoor Fan Motor Feedback Circuit
I O
G
0V
20V
5V
5V
15V
0V
VDC
FM
GND
VCC
VS
FG
JOINT
CONNECTOR
1
3
4
5
6
340V
R501
ZD201
IC201
Q503
Q502
Q204
PC202
PC201
R510
R504 R503
C991
C992
R502
R501
R502 R507
R509
C503
C504
R508
C505
0V
0V
0V
R234 R233
R232
C231
Fig. 10-1
● Fan motor will receive signal thru Joint Connector with VDC (Motor Drive Voltage), VCC (Motor Controller
Power Supply), VSC (RPM Instruction) motor WCC return the FG sinal under frequency RPM.
● The circuit produces fan motor drive from 340V DC supplied from the indoor unit and controls the fan
motor speed.
!
CAUTION 1
Indoor fan motor circuit will be connected with primary
power source line and please take care of the
electrical shock.
!
CAUTION 2
Please do not disconnect the fan motor connector during
running due to the high voltage supply, it will cause the
damage at fan motor and PWB.
● <Exp. of circuit wave>
JOINT
CONNECTOR
Fig. 10-2
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