Principal Parts And Functions - Mitsubishi Electric PURY-P72 Service Handbook

[ VI Refrigerant Circuit ]

[2] Principal Parts and Functions

1. Outdoor unit
Part Symbols
name (functions)
Com- MC1
pressor (Comp1)
High 63HS1
pressure
sensor
Low 63LS
pressure
sensor
Pres- 63H1
sure
switch
Power Trans former
supply
trans-
former
Electro- 52F
magnet-
ic
contactor
HWE09130
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
YJMU Decreases the power supply volt-
only age (460V) supplied to the circuit
board
P120 Turns ON and OFF the output to
and the fan motor.
P144
only
- 126 -
Specifications
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)
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
GND (Black)
1
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
GND (Black)
1
2
Vout (White)
3
Vcc (DC5V) (Red)
4.15MPa[601psi] OFF setting
Primary rated voltage:
460V, 50/60Hz
Secondary rated voltage:
229V
(No-load voltage)
AC208-230V
Check method
(Refer to the
section on
troubleshoot-
ing the outdoor
unit fan
(page 295) for
the ON/OFF
pattern of the
electromag-
netic contac-
tors.)
GB