4
5
3
1
6
2
2
3
5
1
6
4
M
D
A
E
B
C
(1) Indoor, BC controller LEV
The valve opening angle changes in proportion to the number of pulses.
(Connections between the indoor unit’s control board and indoor, BC controller LEV.)
LEV
Brown
Red
Blue
Orange
Yellow
White
φ
4
φ
3
φ
2
φ
1
Wire joining connecter
DC12V
Indoor control board
Output
(Phase)
Output state
1
2
3
4
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 are off.
❉
2. When the output is out of phase or remains ON con-
tinuously, the motor cannot run smoothly, but move
jerkily and vibrates.
❉
When the power is switched ON, a 2200 pulse valve
opening signal is output to make sure the valve’s posi-
tion, so that it is definitely at point
A
.
❉
When the valve operates smoothly, there is no sound
from the LEV and no vibration occurs, but when the
valve is locked or
E
→
A
, it emits a noise .
❉
Whether a sound is being emitted or not can be deter-
mined by holding a screwdriver, etc. against it, then
placing your ear against the handle.
V
a
lve opening
Closing
of valve
Opening
of valve
80 ~ 100 pulses
1400 pulses
LEV pulses
Indoor unit connecter CN60
Pulse signal output and valve operation
LEV valve closing and valve opening operation
φ
6
φ
4
φ
3
φ
2
φ
1
φ
4
φ
3
φ
2
φ
1
φ
5
- 178 -
6. LEV
