Mitsubishi Electric PUHY-P200 Service Handbook page 140

5. LEV
(1) Indoor LEV
The valve opening angle changes in proportion to the number of pulses.
(Connections between the indoor unit's control board and indoor LEV.)
LEV
4
6
M
2
5
1
3
Pulse signal output and valve operation
Output
(Phase)
1
1 ON
2 ON
3 OFF
4 OFF
LEV valve closing and valve opening operation
Closing
of valve
A
E
B
80 ~ 100 pulses
Wire joining connecter
φ 4
φ 3
φ 2
φ 1
Indoor unit connecter CN60
Output state
2 3 4
OFF OFF ON
ON OFF OFF
ON ON OFF
OFF ON ON
D
C
Opening
of valve
1400 pulses
LEV pulses
- 138 -
Brown
2
Red
5
1 Blue
Orange
3
4
Yellow
6
White
Output pulses change in the following orders when the
1 → 2 → 3 → 4 → 1
Valve is closed;
4→ 3 → 2 → 1 → 4
Valve is open;
❉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
❉ When the valve operates smoothly, there is no sound
from the LEV and no vibration occurs, but when the
valve is locked or
E
❉ 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.
Indoor control board
DC12V
φ 6
φ 5
φ 4
φ 4
φ 3
φ 3
φ 2
φ 2
φ 1
φ 1
.
A
→
, it emits a noise .
A