Mitsubishi Electric PUHY-HP200 Service Handbook page 81

[ VI Refrigerant Circuit ]
Symbols
Part name
(functions)
Thermistor TH4
(Discharge)
TH2
TH3
(Pipe
temperature)
TH7
(Outdoor
temperature)
TH6
THHS
Inverter
heat sink
temperature
THBOX
Control box
internal tem-
perature de-
tection
HWE08110
Notes Usage
1) Detects discharge air tempera-
ture
2) Provides high-pressure protec-
tion
0°C[32°F] :698kohm
10°C[50°F] :413kohm
20°C[68°F] :250kohm
30°C[86°F] :160kohm
40°C[104°F] :104kohm
50°C[122°F] : 70kohm
60°C[140°F] : 48kohm
70°C[158°F] : 34kohm
80°C[176°F] : 24kohm
90°C[194°F] :17.5kohm
100°C[212°F] :13.0kohm
110°C[230°F] : 9.8kohm
LEV 1 is controlled based on the
TH2, TH3, and TH6 values.
1) Controls frequency
2) Controls defrosting during
heating operation
3) Detects subcool at the heat ex-
changer outlet and controls
LEV1 based on HPS data and
TH3 data
1) Detects outdoor air tempera-
ture
2) Controls fan operation
Controls LEV1 based on TH2, TH3,
and TH6 data.
Controls inverter cooling fan based
on THHS temperature
- 72 -
Specifications
Degrees Celsius
R = 7.465k
120
R = 4057
25/120
R =
t
1 1
7.465 exp
4057
393
Degrees Celsius
R = 15k
0
R = 3460
0/80
1 1
R = 15 exp
3460
t
273
0°C[32°F] :15kohm
10°C[50°F] :9.7kohm
20°C[68°F] :6.4kohm
25°C[77°F] :5.3kohm
30°C[86°F] :4.3kohm
40°C[104°F] :3.1kohm
Degrees Celsius
R = 17k
50
R = 4016
25/120
1 1
R = 17 exp
4016
t
323
0°C[32°F] :161kohm
10°C[50°F] :97kohm
20°C[68°F] :60kohm
25°C[77°F] :48kohm
30°C[86°F] :39kohm
40°C[104°F] :25kohm
Check method
Resistance
check
Resistance
check
GB