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[ IX Troubleshooting ]
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HWE0803A GB
-4- Outdoor Unit Fan
To check the revolution of the fan, check the inverter output state on the self-diagnosis LED, as the inverter on the outdoor
fan controls the revolutions of the fan.The revolution of the fan is approximately 680rpm(P72 model),790rpm(P96 and P120
models) at full speed.
When starting the fan, the fan runs at full speed for 5 seconds.
When setting the DIP SW1 as shown in the figure below, the inverter output [%] will appear. 100% indicates the full speed
and 0% indicates the stopping.
As the revolution of the fan changes under control, at the interphase or when the indoor unit operation capacity is low, the
revolution of the fan may change.
If the fan does not move or it vibrates, fan inverter board problem or fan motor problem is suspected. Refer to IX [4] -7- (2) [5]
"Check the fan motor ground fault or the winding." and IX [4] -7- (2) [6] "Check the FAN board failure."
-5- LEV
LEV operation
LEV are stepping-motor-driven valves that operate by receiving the pulse signals from the indoor and outdoor unit control
boards.
(1) Indoor LEV and BC controller LEV
The valve opening changes according to the number of pulses.
1) Control boards and the LEV
2) Pulse signal output and valve operation
3) LEV valve closing and opening operation
123456789 10
ON
SW1
Indoor unit connector CN60
Control board CNLV1,CNLV2
Connector
4
3
2
1
Intermediate connector
Red
Brown
Blue
Orange
Yellow
White
Outdoor control board
DC12V
6
5
4
3
2
1
Drive circuit
4
3
2
1
LEV
M
5
2
1
3
4
6
Red
Orange
White
Brown
Blue
Yellow
Note. The connector numbers on the intermediate connector and the connector on the control board differ. Check the color of the lead wire
to judge the number.
5
2
1
3
4
6
Output state
Output
(phase)
number
1234
1 ON OFF OFF ON
2 ON ON OFF OFF
3 OFF ON ON OFF
4 OFF OFF ON ON
Output pulses change in the following orders when the
Valve is closed; 1 2 3 4 1
Valve is open; 4 3 2 1 4
*1. When the LEV opening angle does not change,
all the output phases will be off.
*2. When the output is open phase or remains ON,
the motor cannot run smoothly, and rattles and vibrates.