Mitsubishi Electric PURY-P72 Service Handbook page 288

[ IX Troubleshooting ]
-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
LEV
Blue
4
Brown
M 6
Yellow
2
5
1
White Red Orange
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.
2) Pulse signal output and valve operation
Output
(phase)
number
1
1 ON
2 ON
3 OFF
4 OFF
3) LEV valve closing and opening operation
HWE0803A
SW1
1 2 3 4 5 6 7 8 9 10
ON
Intermediate connector
2
5
1
4
3 3
2
4
6
1
Output state
2 3 4
OFF OFF ON
ON OFF OFF
ON ON OFF
OFF ON ON
- 279 -
Outdoor control board
Brown
6
Red
5
Blue
4
Orange
3
Yellow
2
White
1
Connector
Indoor unit connector CN60
Control board CNLV1,CNLV2
Output pulses change in the following orders when the
Valve is closed; 1 2
Valve is open; 4 3
*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.
DC12V
Drive circuit
4
3
2
1
3 4 1
2 1 4
GB