Mitsubishi MSZ-FA-VA Service Technical Manual page 70

Correct the LEV opening according to the difference between target discharge temperature and discharge temperature.
MXZ-2A52VA
More than Target discharge temperature+10
Target discharge temperature+10 to Target discharge temperature+5
Target discharge temperature+5 to Target discharge temperature+2
Target discharge temperature+2 to Target discharge temperature-2
Target discharge temperature-2
Target discharge temperature-5
Target discharge temperature-10 or less
MXZ-3A54VA MXZ-4A71VA
More than Target discharge temperature+10
Target discharge temperature+10 to Target discharge temperature+5
Target discharge temperature+5 to Target discharge temperature+2
Target discharge temperature+2 to Target discharge temperature-2
Target discharge temperature-2
Target discharge temperature-5
Target discharge temperature-10 or less
MXZ-4A80VA
More than Target discharge temperature+12
Target discharge temperature+12 to Target discharge temperature+5
Target discharge temperature+5 to Target discharge temperature+3
Target discharge temperature+3 to Target discharge temperature-3
Target discharge temperature-3
Target discharge temperature-5
Target discharge temperature-12 or less
(2) Separate correction (COOL,DRY)
(Correction by the separate super heat)
a) Correct the LEV separately by temperature difference between each gas pipe temperature and the minimum gas pipe
temperature of all.
1 Calculate each super heat of the unit from the expression below;
(Super heat) = (Each gas pipe temperature) - (Minimum gas pipe temperature)
2 Separate correction is performed according to each super heat in the table below.
MXZ-3A54VA MXZ-4A71VA
Superheat
more than 9
6 to 9
3 to 6
3 or less
Downloaded from AC-Manual.com Manuals
Discharge temperature (:)
to Target discharge temperature-5
to Target discharge temperature-10
Discharge temperature (:)
to Target discharge temperature-5
to Target discharge temperature-10
Discharge temperature (:)
to Target discharge temperature-5
to Target discharge temperature-12
MXZ-4A80VA
LEV opening
correction (pulse)
3
2
1
0
COOL
COOL
COOL
LEV opening
Superheat
correction (pulse)
more than 9 12
6 to 9 8
3 to 6 4
3 or less
0
70
LEV opening
correction (pulse)
HEAT
5 8
4 3
2 1
0 0
-1 -1
-3 -2
-4 -3
LEV opening
correction (pulse)
HEAT
5 8
4 3
2 1
0 0
-1 -1
-3 -2
-4 -3
LEV opening
correction (pulse)
HEAT
4 6
2 2
1 1
0 0
-1 -1
-3 -2
-8 -8