List Of Major Component Functions - Mitsubishi CITY MULTI PUD-P250YMF-C Service Handbook

2 2 List of Major Component Functions

(1) Outdoor Unit
< PUD-P250YMF-C >
Symbol
Name
(function)
Compressor MC
High 63HS
pressure
sensor
Low 63LS
pressure
sensor
63H
Pressure
switch
Thermistor TH1
(discharge)
TH2
(low pressure
saturation
temperature)
TH5
(piping
temperature)
TH6 (outdoor
air tempera-
ture)
TH7
(subcool coil
outlet
temperature)
TH8
(subcool coil
bypass outlet
temperature)
TH9
Application
Adjust refrigerant circulation by
controlling operating frequency and
capacity control valve with operating
pressure.
1) High press. detection.
2) Frequency control and high
pressure protection
1) Detects low pressure
2) Calculates the refrigerant circulation
configuration.
3) Protects the low pressure
1) High pressure detection
2) High pressure protection
1) Discharge temperature detection
2) High pressure protection
20˚C : 250kΩ 70˚C :
30˚C : 160kΩ 80˚C :
40˚C : 104kΩ 90˚C : 17.5kΩ
50˚C : 70kΩ 100˚C : 13.0kΩ
60˚C : 48kΩ 110˚C : 9.8kΩ
1) Detects the saturated vapor
temperature.
2) Calculates the refrigerant circulation
configuration.
3) Controls the compressor frequency.
4) Controls the outdoor unit's fan air
volume.
1) Frequency control
2) Defrost control and liquid level
detection at heating
1) Outdoor air temperature detection
2) Fan control, liquid level heater,
and opening setting for oil return
Subcool coil bypass LEV (LEV1)
control
Subcool coil bypass LEV (LEV1)
control
1) Detects the CS circuit fluid
temperature.
2) Calculates the refrigerant
circulation configuration.
- 53 -
Specification
Low pressure shell scroll type
with capacity control mechanism
Winding resistance:
Each phase 0.388Ω (20˚C)
Pressure
63HS
0~2.94MPa
Vout 0.5~3.5 V
1 2 3
Con-
1 Gnd (black)
nector
2
Vout (white)
3
Vcc (DC5V) (red)
Pressure
63LS
0~0.98MPa
Vout 0.5~3.5 V
1 2 3
Con-
1
nector
Gnd (black)
2
Vout (white)
3
Vcc (DC5V) (red)
Setting 2.94MPa OFF
R =7.465kΩ
120
B =4057
25/120
34kΩ
Rt = 7.465exp
24kΩ
1
{4057( -
273+t 273+120
R =33kΩ
0
B =3965
0/100
Rt =
1
33exp{3965(
273+t
-20˚C : 92kΩ
-10˚C : 55kΩ
0˚C : 33kΩ
10˚C : 20kΩ
20˚C : 13kΩ
30˚C : 8.2kΩ
R =15kΩ
0
B =3460
0/100
Rt =
1
15exp{3460(
273+t
0˚C : 15kΩ
10˚C : 9.7kΩ
20˚C : 6.4kΩ
25˚C : 5.3kΩ
30˚C : 4.3kΩ
40˚C : 3.1kΩ
Check method
Continuity check
Resistance value
check
1
)}
Resistance value
check
1
- )}
273+0
1
- )}
273+0