Mitsubishi PUHY-EP250 Service Handbook page 67

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