Mitsubishi City Multi P500YEM-A, Руководство по обслуживанию, Страница: 74 / 145

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Indoor LEV Pulse Signal and Valve Operation
Output Phase
Output State
1 3 4
ø 1
ON OFF OFF
ON
ø
2 O OFF OFF
ø
3 OFF ON ON OFF
ø 4 OFF OFF ON ON
Valve opening
2000 Pulses
LEV Pulses
80-100 Pulses
Indoor Control Board
DC12V
LEV
Wire joining connector
2
2
Brown
6
5 Red
5
6
2
1 5 4 1
Blue
4
4
3
3 3
Orange
3
3
2 4
Yellow
2
2
1 6
White
1
1
Indoor Unit Connector
CN60
M
2
ON N
D
E
A
B
Indoor LEV, BC LEV1 and 2
The valve opening angle changes in proportion to the number of pulses.
(Connections between the indoor unit’s MAIN board and indoor LEV)
Pulse Signal Output and Valve Operation
LEV Valve Closing and Valve Opening Operations
Output pulses change in the following orders:
v alve is Closed 1 2 3 4 1
v alve 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 stays on, the motor
cannot run smoothly, and it jerks and vibrates.
❇ When the power is switched on, a 2200-pulse valve
opening signal is output to locate the valve’s position
to ensure that it is at point
A
. (The pulse signal is output
for approximately 17 seconds.)
❇
Normal operation of the valve does not produce noise or
vibration. When the valve is locked, or
E
→
A
it produces
noise.
❇
Hold the tip of a screwdriver against it and the handle
against your ear, and listen for operating sounds.
❇
If there is liquid refrigerant inside the LEV, the sound
may become lower.
(5)
When the
When the
C
• Indoor unit and BC controller