Functions Of The Major Components Of Outdoor Unit - Mitsubishi Electric HP120TNU-A Service Handbook

[3-3 Functions of the Major Components of Outdoor Unit ]

3-3

Functions of the Major Components of Outdoor Unit

Part Symbols
name (functions)
Com- MC1
pressor (Comp1)
High 63HS1
pres-
sure
sensor
Low 63LS
pres-
sure
sensor
Pres- 63H1
sure
switch
Power Transformer YNU only
supply
trans-
former
Thermis- TH4
tor (Discharge
temperature)
4
- chapter 3
Notes Usage
Adjusts the amount of circulating
refrigerant by adjusting the operat-
ing frequency based on the oper-
ating pressure data
1) Detects high pressure
2) Regulates frequency and pro-
vides high-pressure protec-
tion
1) Detects low pressure
2) Provides low-pressure pro-
tection
1) Detects high pressure
2) Provides high-pressure pro-
tection
Decreases the power supply volt-
age (460V) supplied to the circuit
board
1) Detects discharge air temper-
ature
2) Provides high-pressure pro-
tection
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
Specifications
HP72 model
Low-pressure shell scroll
compressor
wirewound resistance
20°C [68°F] : 0.078 (YNU),
0.192 (TNU)
HP96, HP120 models
Low-pressure shell scroll
compressor
wirewound resistance
20°C [68°F] : 0.087 (YNU),
0.219 (TNU)
Pressure
63HS1
0~4.15 MPa [601psi]
Vout 0.5~3.5V
1 2 3
0.071V/0.098 MPa [14psi]
Pressure [MPa]
Con-
=1.38 x Vout [V]-0.69
nector
Pressure [psi]
=(1.38 x Vout [V] - 0.69) x 145
1 GND (Black)
2
Vout (White)
3
Vcc (DC5V) (Red)
Pressure
63LS
0~1.7 MPa [247psi]
Vout 0.5~3.5V
1 2 3
0.173V/0.098 MPa [14psi]
Pressure [MPa]
Con-
=0.566 x Vout [V] - 0.283
nector
Pressure [psi]
=(0.566 x Vout [V] - 0.283) x 145
1 GND (Black)
2
Vout (White)
3
Vcc (DC5V) (Red)
4.15MPa[601psi] OFF set-
ting
Primary rated voltage: 460V,
50/60Hz
Secondary rated voltage:
229V
(No-load voltage)
Degrees Celsius
R = 7.465k
120
R = 4057
25/120
R =
t
1 1
7.465 exp
4057
393
Check method
Resistance check
HWE18220_GB