114
Linear expansion valve (LEV) is controlled by "Thermostat ON" commands given from each unit.
❈
For the differential start-up, the LEV is controlled at 52 pulse for the first 15 minutes after compressor stop.
There are 10 levels specified for standard LEV opening depending on the compressor operational frequency.
Based on these standard valves, the LEV opening is modified according to the suction super heat, discharge tem-
perature, and gas pipe temperature.
<LEV opening>
<Standard LEV opening by capacity code>
Standard LEV opening
30
Level 10
Level 09
Level 08
Level 07
Level 06
Level 05
Level 04
Level 03
Level 02
Level 01
40
50
60
70
80
90
100
110
120
Hysteresis width
=5Hz
< COMP Hz >
Non-opening indoor unit
Outdoor unit ON (Indoor unit ON) : 5 pulse
Outdoor unit OFF (Indoor unit OFF or
Thermostat OFF) : Before shutdown
Refer to the standard LEV opening as shown below.
From the initial valve, the LEV opening is controlled according
to suction superheat and the discharge temperature.
Refer to the standard LEV opening as shown below.
From the initial valve, the LEV opening is controlled according
to the suction superheat and the discharge temperature.
Thermostat ON in HEAT mode
LEV opening
Thermostat ON in DRY mode
Thermostat OFF in
COOL or DRY mode
Thermostat OFF in HEAT mode
All indoor units OFF
❈
52
➝
500 pulse
Indoor unit status
COOL : 5 pulse
HEAT : 59 pulse
COOL : 5 pulse
HEAT : 49 pulse
Refer to the standard LEV opening as shown below.
Thermostat ON in COOL mode
Before shutdown
➝
350 pulse
Outdoor unit ON (Indoor unit ON) : 5 pulse
Outdoor unit OFF (Indoor unit OFF
or Thermostat OFF) :
❈
52
➝
500 pulse
Outdoor unit ON (Indoor unit ON) : 49 pulse
Outdoor unit OFF (Indoor unit OFF or
Thermostat OFF) : Before shutdown
Outdoor unit ON (Indoor unit ON) : 5 pulse
Outdoor unit OFF (Indoor unit OFF
or Thermostat OFF) :
❈
52
➝
500 pulse
MXZ-18RV
MXZ-32RV
Capacity class
Level 01
Level 02
Level 03
Level 04
Level 05
Level 06
Level 07
Level 08
Level 09
Level 10
07,09
100/70
100/70
100/90
100/110
100/130
110/150
120/170
130/190
140/210
150/230
MXZ-32RV-E1
12,13
140/90
140/90
140/110
140/130
140/150
150/170
160/190
170/210
180/230
190/250
12
255/90
255/90
255/90
255/90
255/90
255/100
255/110
255/120
255/130
255/140
07,09
255/70
255/70
255/70
255/70
255/70
255/80
255/90
255/100
255/110
255/120
18
160/100
160/100
160/120
160/140
160/160
170/180
180/200
190/220
200/240
210/260
MXZ-18RV-E1
11-10.2.LEV control