SiBE04-101
Checks
Service Diagnosis
127
5.1.14 Indoor Unit PCB(1) Output Check
Check No.35
1. Check the connector’s connection.
2. Check the output of the motor power supply voltage (pins 4-7).
3. Check the output of the motor’s control voltage (pins 3-4).
4. Check the output of the rotation command voltage (pins 2-4).
5.1.15 Indoor Unit PCB(1) Rotation Pulse Input Check
Check No.37
1. Check the connector’s connection.
2. Set the power supply to ON, and OFF.
3. Check if the pulse inputs are conducted four times or not when rotating the fan motor one cycle by
hand. (pins 1-4).
7
6
5
4
3
2
1
Motor power supply voltage
Unused
Unused
P.0V (Reference potential)
Motor control voltage (DC15V)
Rotation command voltage (DC~6.5V)
Rotation pulse input
S1
(R1231)
PCB
4
3
2
1
P.0V (Reference potential)
Motor control voltage
Rotation command voltage (DC1~6.5V)
Rotation pulse input (DC0, 15V)
(R1232)
PCB
SiBE04-101.book Page 127 Monday, October 15, 2001 3:08 PM
