42
Check whether the maiin PCB
iis normallthrough iindex 1?
No
10.3.3.4 Outdoor fan speed has been out of control (E8)
No
Yes
Yes
No
Yes
No
Yes
Replace the fan motor
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
Find out the cause and
have iit solved. For
example: wether the fan is
blocked or the screws
which fix the fan are
tighten
.
.
Shut off the power supplly,
rotate the fan by hand. Does
iit rotate properlly?
No
Power off, then restart the
unit 2 minutes later. Is i
i
t still
displ
l
aying the error code?
The unit operates normally
.
..
Check the wiring of fan motor.
Are all the connections good
Correct the connections
.
..
Replace the main PCB
Summary of Contents for RM2-053B-OU
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