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
100 pulse or less
Cooling
5
2
1
0
-1
-2
-5
NOTE : Discharge temperature : Ta, Target discharge temperature : Tb
100 pulse or more
Cooling
20
10
2
0
-2
-5
-10
Opening immediately before having stopped last time
2
When the temperature difference
RT between indoor coil thermistor (main) RT12 and indoor coil thermistor (sub)
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
RT is 3
:
or more, the target temperature
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
less than 2
:
20
10
2
0
-2
-5
-10
NOTE : Discharge temperature : Ta, Target discharge temperature : Tb
3
:
or more
60
20
2
0
-2
-5
-10
RT
2
:
or more and less than 3
:
60
20
2
0
-2
-5
-10
The target discharge temperature (Tb) is set according to the operation mode or the unit status as follows.
Tb (
:
)
COOL (Normal)
COOL ( RT is less than 2
:
, or RT is 2
:
or more and less than 3
:
.)
COOL ( RT is 3
:
or more.)
NOTE : Target discharge temperature : Tb
90
75
65
Operation mode
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.)
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