Mitsubishi Electric PURY-P120Y(T)HMU-A, Service Handbook

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[
VI
Refrigerant Circuit ]
- 116 - HWE0803A GB
[2] Principal Parts and Functions
1. Outdoor unit
Part
name
Symbols
(functions)
Notes Usage Specifications Check method
Com-
pressor MC1
(Comp1) Adjusts the amount of circulating
refrigerant by adjusting the operat-
ing frequency based on the oper-
ating pressure data P72 model
Low-pressure shell scroll
compressor
Wirewound resistance
20°C[68°F] :
0.268ohm (THMU)
0.981ohm (YHMU)
P96, P120 models
Low-pressure shell scroll
compressor
Wirewound resistance
20°C[68°F] :
0.161ohm (THMU)
0.583ohm (YHMU)
High
pres-
sure
sensor 63HS1 1) Detects high pressure
2) Regulates frequency and pro-
vides high-pressure protec-
tion
Low
pres-
sure
sensor 63LS 1) Detects low pressure
2) Provides low-pressure pro-
tection
Pres-
sure
switch 63H1 1) Detects high pressure
2) Provides high-pressure pro-
tection
4.15MPa[601psi] OFF setting
Thermis-
tor TH4
(Discharge) 1) Detects discharge air temper-
ature
2) Provides high-pressure pro-
tection
Degrees Celsius Resistance
check
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
Pressure
0~4.15 MPa [601psi]
Vout 0.5~3.5V
0.071V/0.098 MPa [14psi]
Pressure [MPa]
=1.38 x Vout [V]-0.69
Pressure [psi]
=(1.38 x Vout [V] - 0.69) x 145
GND (Black)
Vout (White)
Vcc (DC5V) (Red)
Con-
nector
63HS1
1
1 2 3
2
3
Pressure
0~1.7 MPa [247psi]
Vout 0.5~3.5V
0.173V/0.098 MPa [14psi]
Pressure [MPa]
=0.566 x Vout [V] - 0.283
Pressure [psi]
=(0.566 x Vout [V] - 0.283) x 145
GND (Black)
Vout (White)
Vcc (DC5V) (Red)
Con-
nector
63LS
1
1 2 3
2
3
R = 7.465k
120
R = 4057
R =
7.465
25/120
t
4057
273 t
1
393
1
exp