Mitsubishi Electric MS-30SV-A1 Service Manual page 23

(1) LEV opening correction by discharge temperature
The LEV opening is corrected according to the temperature difference between target discharge temperature (Tb) and
actual discharge temperature (Ta).
1 The LEV correction is used properly for two kinds according to the LEV opening status at operation off.
Rank
Ta (:)
more than Tb+10
Tb+5 to Tb+10
Tb+2 to Tb+5
Tb-2 to Tb+2
Tb-5 to Tb-2
Tb-10 to Tb-5
less than Tb-10
NOTE : Discharge temperature : Ta, Target discharge temperature : Tb
2 When the temperature difference
RT13 in the indoor unit is 2: or more for a fixed time at cool or dry operation, the target discharge temperature is
changed. After the temperature is changed, when temperature difference
is changed again. The LEV opening is controlled based on the changed target discharge temperature and the temper-
ature difference RT.
Ta (:)
more than Tb+10
Tb+5 to Tb+10
Tb+2 to Tb+5
Tb-2 to Tb+2
Tb-5 to Tb-2
Tb-10 to Tb-5
less than Tb-10
NOTE : Discharge temperature : Ta, Target discharge temperature : Tb
The target discharge temperature (Tb) is set according to the operation mode or the unit status as follows.
COOL (Normal)
COOL ( RT is less than 2:, or
COOL ( RT is 3 :or more.)
NOTE : Target discharge temperature : Tb
NOTE : When the discharge temperature (Ta) is 50: or less on the cool operation LEV opening is set in 54 pulse.
When this state continues for 20 minutes, the compressor is stopped and restarts in 3 minutes.
When the compressor is stopped, the indoor unit indicates the abnormality of refrigerant system and stops.
(OPERATION INDICATOR lamp is 10-time flashing on and off.)
Opening immediately before having stopped last time
100 pulse or less
Cooling
5
2
1
0
-1
-2
-5
RT between indoor coil thermistor (main) RT12 and indoor coil thermistor (sub)
less than 2:
20
10
2
0
-2
-5
-10
Operation mode
RT is 2:or more and less than 3:.)
23
100 pulse or more
RT is 3: or more, the target temperature
RT
2: or more and less than 3:
60
20
2
0
-2
-5
-10
Cooling
20
10
2
0
-2
-5
-10
3: or more
60
20
2
0
-2
-5
-10
Tb (:)
90
75
65