Mitsubishi Electric MS-A WA Service Technical Manual page 27

<Correction>
Discharge temperature
Each correction
• (Each gas pipe temperature thermistor - Minimum gas pipe temperature thermistor) 1
• (Main indoor coil thermistor - Sub indoor coil thermistor)
1 Perform this, when number of operation units is 2 units or more.
(MXZ-2A20NA and MXZ-3A30NA only)
2 Correct the LEV opening by discharge temperature.
(1) LEV opening correction by discharge temperature
The target discharge temperature is determined according to frequency zone and number of operation unit of the com-
pressor.
MXZ-2A20NA
Operation frequency
of compressor (Hz)
Minimum ~ 23
24 ~ 38
39 ~ 54
55 ~ 69
70 ~ 85
86 ~ Maximum
, MXZ-2B20NA MXZ-2B20NA-
MXZ-2A20NA-
1 2
Operation frequency
of compressor (Hz)
Minimum ~ 23
24 ~ 38
39 ~ 54
55 ~ 69
70 ~ 85
86 ~ Maximum
MXZ-3A30NA
Operation frequency
of compressor (Hz)
Minimum ~ 14
15 ~ 23
24 ~ 32 120.2/49
33 ~ 41 136.4/58
42 ~ 50
51 ~ 59 154.4/68
60 ~ 68
69 ~ 77
78 ~ 86
87 ~ Maximum
COOL
1 unit
95/35
104/40
120.2/49
136.4/58
149/65
158/70
COOL
1 unit
95/35
104/40
120.2/49
136.4/58
149/65
158/70
COOL
1 unit 2 units
95/35 131/55
104/40 131/55
136.4/58
140/60
149/65 149/65
154.4/68
158/70 158/70
167/75 163.4/73
167/75 167/75
167/75 176/80
Target discharge temperature (°F/°C)
Number of operating unit
2 units
136.4/58
140/60
149/65
154.4/68
158/70
158/70
1
Target discharge temperature (°F/°C)
Number of operating unit
2 units
136.4/58
140/60
149/65
154.4/68
158/70
158/70
Target discharge temperature (°F/°C)
Number of operating unit
3 units 1 unit
134.6/57 125.6/52
134.6/57 136.4/58
145.4/63 149/65
149/65 154.4/68
158/70 154.4/68
163.4/73 154.4/68
167/75 154.4/68
176/80 154.4/68
179.6/82 154.4/68
179.6/82 172.4/78
27
COOL DRY
● ●
2 2
● ●
HEAT
1 unit
122/50 122/50
132.8/56 122/50
140/60 132.8/56
140/60 140/60
140/60 140/60
140/60 140/60
HEAT
1 unit
122/50 122/50
132.8/56 122/50
140/60 132.8/56
145.4/63 140/60
150.8/66 140/60
152.6/67 140/60
HEAT
2 unit
143.6/62
150.8/66
165.2/74
172.4/78
172.4/78
172.4/78
172.4/78
172.4/78
172.4/78
172.4/78
HEAT
●
—
2 units
2 units
3 units
122/50
131/55
140/60
152.6/67
161.6/72
168.8/76
168.8/76
168.8/76
168.8/76
168.8/76