Mitsubishi Electric PURY-P120TJMU-A, Service Handbook, Page: 135 / 411

[
VI
Refrigerant Circuit ]
- 126 - HWE0913A 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] :
0.20ohm (TJMU)
0.71ohm (YJMU)
P96, P120, P144 models
Low-pressure shell scroll
compressor
Wirewound resistance
20°C[68°F] :
0.092ohm (TJMU)
0.323ohm (YJMU)
High
pressure
sensor 63HS1 1) Detects high pressure
2) Regulates frequency and pro-
vides high-pressure protec-
tion
Low
pressure
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
Power
supply
trans-
former Trans former YJMU
only Decreases the power supply volt-
age (460V) supplied to the circuit
board Primary rated voltage:
460V, 50/60Hz
Secondary rated voltage:
229V
(No-load voltage)
Electro-
magnet-
ic
contactor 52F P120
and
P144
only Turns ON and OFF the output to
the fan motor. AC208-230V (Refer to the
section on
troubleshoot-
ing the outdoor
unit fan
(page 295) for
the ON/OFF
pattern of the
electromag-
netic contac-
tors.)
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