Mitsubishi Electric 500YEMK-A, Руководство по обслуживанию

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2
LEV2
Pulse Signal Output and Valve Operation
Output (Phase) Output State
No. 1 2 3 4
ø 1 ON OFF OFF ON
ø 2 ON ON OFF OFF
ø 3 OFF ON ON OFF
ø 4 OFF OFF ON ON
LEV Valve Closing and Valve Opening Operations
V
alv
e Opening Angle (Flo
w Rate)
Increased choke range
(80 ~ 100 pulses)
Pulse Count
Full Open
2000 pulses
Valve Closing
Valve Opening
C
A
B
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 does not change, all output
phases are OFF.
2. When the output opens a phase and stays ON, the
motor will not run smoothly and will clack and
vibrate.
3. When the power source is turned on, a close valve
signal (2200 pulse) is sent to confirm the valve
position, ensuring a starting point of
A
.
4. When the valve is operating smoothly, there will be
no sound or vibrations from the LEV, when opera-
tion goes from point
E
to point
A
, the valve locks
and open phases create a considerable noise.
5. The noise emanates from the driver and can be
easily discerned by placing a screwdriver against it
and then placing your ear against the handle.
D
E