Service manual

MUZ-GA71VA
49
In COOL operation, the two indoor coil thermistors (one main and one sub) sense temperature ununiformity (super
heat) at the heat exchanger, and when temperature difference have developed, the indoor coil thermistors adjust
LEV opening degree to get approximate 10 degrees lower temperature than the target temperature in the table
above, thus diminishing super heat.
(2) Time chart
OFF Time
Time
ON
Operational frequency
of the compressor
Commanded
to open
Standard
opening
degree
Opening degree is
corrected according
to discharge
temperature.
Positioning
Air conditioner ON
Air conditioner OFF
(thermostat off)
LEV opening degree
about 5 minutes <COOL, DRY>
about 15 minutes <HEAT>
(3) Control data
06
05
04
03
02
01
LEV opening degree
A(target discharge temperature)
B
C
D
E
F
30 50 70
Operational frequency of the compressor
90 110
(Hz)
A
60/60
B
60/63
C
60/65
D
63/67
E
66/70
F
67/70
(a) Reference value of target discharge temperature
(COOL/HEAT :)
01
150/130
02
166/150
03
186/176
04
206/196
05
230/210
06
260/226
(b) Reference value of LEV standard opening degree
(COOL/ HEAT pulse)
60/60
60/63 60/65
63/67
64/70 67/70
MUZ-GA50VA
MUZ-GA60VB
62/60
62/65 64/67
68/72 74/80 82/85
MUZ-GA71VA
150/130
166/150 186/170
206/196
230/210
260/226
MUZ-GA50VA
MUZ-GA60VA
170/140
200/160 240/200
270/220
280/230
290/250
Applied model
Applied model
MUZ-GA80VA
MUZ-GA80VA
62/60 62/65 64/70 68/75
74/80 82/84
140/140 170/160 210/200 250/220
270/230 290/250
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