45
18.3.3.4 Outdoor unit fan speed has been out of control (E8)
Power off, then restart the
unit 2 minutes later. Is it still
displaying the error code?
Power off, then restart the
unit 2 minutes later. Is it still
displaying the error code?
Shut off the power supply,
rotate the fan by hand. Does
it rotate properly?
Shut off the power supply,
rotate the fan by hand. Does
it rotate properly?
The unit operates normally.
The unit operates normally.
Find out the cause and
have it solved. For
example,
whether the fan
is blocked or the screws
which fix the fan are
tighten.
Find out the cause and
have it solved. For
example,
whether the fan
is blocked or the screws
which fix the fan are
tighten.
Check the wiring of fan
motor. Are all the
connections good?
Check the wiring of fan
motor. Are all the
connections good?
No
Yes
No
Correct the connections.
Correct the connections.
No
Replace the fan motor
Replace the fan motor
Yes
Yes
Replace the main PCB
Replace the main PCB
No
Check whether the main PCB
is normal through index 1?
Check whether the main PCB
is normal through index 1?
Yes
No
Index 1:
1. Outdoor DC fan motor(control chip is inside fan motor)
Power on and when the unit is in standby, measure the voltage of pin1-pin3, pin4-pin3 in fan motor
connector. If the value of the voltage is not in the range showing in below table, the PCB must have
problems and need to be replaced.
DC motor voltage input and output
NO.
Color
Signal
Voltage
1
Red
Vs/Vm
140V~380V
2
---
---
---
3
Black
GND
0V
4
White
Vcc
13.5-16.5V
5
Yellow
Vsp
0~6.5V
6
Blue
FG
15V
Summary of Contents for 38QUS014D8S2 Series
Page 1: ...SUPER INVERTER SERIES MULTI TYPE Service Manual 2018...
Page 9: ...1...
Page 21: ...13 3 3 Console 16 Drain pipe 195 Hanging arm 700 600 210...
Page 24: ...16 4 3 Console 4 4 Hi wall...
Page 25: ...17 5 Wiring diagram 38QUS018D8S2...
Page 27: ...19 38QUS036D8S4 38QUS042D8S5...
Page 29: ...21 42QSS009D8S 42QSS012D8S 42QZA012D8S...
Page 42: ...11...