32
<Output pulse signal and the valve operation>
(2) Linear expansion valve operation
Open
Extra tightening (about 32 pulse)
Pulse number
500 pulse
Opening a valve
all the way
Close
Valve position (capacity)
Opening a valve : 8 7 6 5 4 3 2 1 8
Closing a valve : 1 2 3 4 5 6 7 8 1
The output pulse shifts in above order.
••When•linear•expansion•valve•operation•stops,•all•output•phases•
become OFF.
••When•the•power•is•turned•on,•700•pulse•closing•valve•signal•will•be•
sent till it goes to point in order to define the valve position. (The
pulse signal is being sent for about 20 seconds.)
••When•the•valve•moves•smoothly,•there•is•no•sound•or•vibration•
occurring from the linear expansion valve: however, when the pulse
number moves from to or when the valve is locked, sound can
be heard.
No sound is heard when the pulse number moves from to in
case coil is burnt out or motor is locked by open-phase.
••Sound•can•be•detected•by•placing•the•ear•against•the•screw•driver•
handle while putting the screw driver to the linear expansion valve.
LEV
M
1
6
1
Gray
Orange
Red
Yellow
Black
3
4
5
6
Connector LEV-A
DC12V
Outdoor controller board
Drive circuit
3
2
5
4
Linear expansion valve
(1) Operation summary of the linear expansion valve
••Linear•expansion•valve•opens/closes•through•stepping•motor•after•receiving•the•pulse•signal•from•the•outdoor•controller•board.
••Valve•position•can•be•changed•in•proportion•to•the•number•of•pulse•signal.
<Connection between the outdoor controller board and the linear expansion valve>
1
ON
OFF
OFF
OFF
ON
ON
OFF
OFF
OFF
ON
OFF
OFF
OFF
ON
ON
OFF
Output
(Phase)
Output
1
2
3
4
2
3
4
5
6
7
8
OFF
OFF
ON
OFF
OFF
OFF
ON
ON
OFF
OFF
OFF
ON
ON
OFF
OFF
ON
LEV-B
OCH465D
