Mitsubishi PUHY-EP250 - Page 67

[3-3 Functions of the Major Components of Outdoor Unit ]
- 58 -
HWE12050 GB
Thermis-
tor
TH4
(Discharge)
1) Detects discharge air temper-
ature
2) Provides high-pressure pro-
tection
Degrees Celsius Resistance check
0°C[32°F] :698 k
10°C[50°F] :413 k
20°C[68°F] :250 k
30°C[86°F] :160 k
40°C[104°F] :104 k
50°C[122°F] : 70 k
60°C[140°F] : 48 k
70°C[158°F] : 34 k
80°C[176°F] : 24 k
90°C[194°F] :17.5 k
100°C[212°F] :13.0 k
110°C[230°F] : 9.8 k
TH2 LEV 1 is controlled based on the
TH2, TH3, and TH6 values.
Degrees Celsius
0°C[32°F] :15 k
10°C[50°F] :9.7 k
20°C[68°F] :6.4 k
25°C[77°F] :5.3 k
30°C[86°F] :4.3 k
40°C[104°F] :3.1 k
Resistance check
TH3
(Pipe
temperature)
1) Controls frequency
2) Controls defrosting during
heating operation
3) Detects subcool at the heat
exchanger outlet and controls
LEV1 based on HPS data
and TH3 data
TH7
(Outdoor
temperature)
1) Detects outdoor air tempera-
ture
2) Controls fan operation
TH5 LEV2 are controlled based on the
63LS and TH5 values.
TH6 Controls LEV1 based on TH2,
TH3, and TH6 data.
THHS
Inverter
heat sink
temperature
Controls inverter cooling fan
based on THHS temperature
Degrees Celsius
0°C[32°F] :161 k
10°C[50°F] :97 k
20°C[68°F] :60 k
25°C[77°F] :48 k
30°C[86°F] :39 k
40°C[104°F] :25 k
Part
name
Symbols
(functions)
Notes Usage Specifications Check method
R = 7.465k
120
R = 4057
R =
7.465
25/120
t
4057
273 t
1
393
1
exp
R = 15k
0
R = 3460
R = 15
0/80
t
3460
273 t
1
273
1
exp
R = 17k
50
R = 4016
R = 17
25/120
t
4016
273 t
1
323
1
exp