Principal Parts And Functions - Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook

[ VI Refrigerant Circuit ]

[2] Principal Parts and Functions

1. Outdoor unit
(1) PUHY
Part Symbols
name (functions)
Compres- MC1
sor (Comp1)
MC2
(Comp2)
High 63HS
pressure
sensor
Low 63LS
pressure
sensor
Pressure 63H1
switch 63H2
Notes Usage
Adjusts the amount of circulating
refrigerant by adjusting the oper-
ating frequency based on the op-
erating pressure data
P168- Operates to secure a constant
P234 amount of circulating refrigerant
models when the load exceeds comp1's
only capacity
1. Detects high pressure
2. Regulates frequency and pro-
vides high-pressure protection
1. Detects low pressure
2. Provides low-pressure protec-
tion
63H2 is 1. Detects high pressure
available 2. Provides high-pressure pro-
only on tection
P168-
P234
models
- 126 -
Specifications
Low-pressure shell scroll
compressor
Wirewound resistance
10°C[50°F] :0 .155ohm
20°C[68°F] : 0.161ohm
30°C[86°F] : 0.167ohm
Low-pressure shell scroll
compressor
Wirewound resistance
10°C[50°F] : 0.467ohm
20°C[68°F] : 0.486ohm
30°C[86°F] : 0.505ohm
Pressure
63HS
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
Check
method