Toyotomi CCT 140IUINV Service Manual page 77

Troubleshooting
2.4.1.5. Indoor fan Speed has been out of control.
Shut off the power supply and
turn it on 1 minute later. Is it
still displaying the error code?
Yes
Shut off the power supply,
rotate the fan by hand. Does
it rotate properly?
Yes
Check the wires of fan motor.
Are all the connections good?
Yes
Check the voltage between port
1 and 6 of fan motor connector,
is it 310V?
No
Replace indoor main PCB. Is it
still displaying the error code?
DC motor voltage input and output (control chip is inside the motor)
DC motor voltage input and output
NO. Color
1 Red
2 ---
3 Black
4 White
5 Yellow
6 Blue
118
No
No
Signal Voltage
Vs/Vm 280V~380V
--- ---
GND 0V
Vcc 14-17.5V
Vsp 0~5.6V
FG 14-17.5V
The unit operates normally.
Replace indoor fan
No
Correct the connections.
motor.
Yes
Electrical Control System