Functions Of The Major Components Of Indoor Unit - Mitsubishi Electric PURY-M200YNW-A1 Service Handbook

[3-4 Functions of the Major Components of Indoor Unit ]

3-4

Functions of the Major Components of Indoor Unit

Part Symbol
Name (functions)
Flow con- FCV
trol valve
Thermis- TH1
tor (Suction air tem-
perature)
TH2
(Inlet pipe tem-
perature)
TH3
(Outlet pipe tem-
perature)
TH4
Outdoor air tem-
perature)
Temperature
sensor (Indoor
air temperature)
Pressure PS1
sensor
(inner wa-
ter)
Pressure PS2
sensor
(outlet
water)
Some parts are not built in, depending on the connected indoor units.
Component Sym-
bol
Room temperature TH21
thermistor
Water inlet pipe TH22
thermistor
Water outlet pipe TH23
thermistor
16
- chapter 3
Notes Usage
Controls the rate of water flow
to the indoor unit.
Indoor unit control (Thermo)
Indoor unit control (Hot adjust)
Indoor unit control (Error de-
tection)
Indoor unit control (Thermo)
Indoor unit control (Thermo)
1) Detects inner water pres-
sure
2) Check flow rate
1) Detects outlet water pres-
sure
2) Check flow rate
Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ
Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ
Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ
Specification
DC12V
Opening of stepping motor
driving valve 85-(770) pulses
R =15k
0
R =3460
0/80
Rt =
1 1
15exp{3460( - )}
273+t 273
0°C [32°F]:15 kΩ
10°C [50°F]: 9.7 kΩ
20°C [68°F]: 6.4 kΩ
25°C [77°F]: 5.3 kΩ
30°C [86°F]: 4.3 kΩ
40°C [104°F]: 3.1 kΩ
Pressure
PS1
0~1.0 MPa [145psi]
Vout 0.5~4.5V
1 2 3
0.392V/0.098 MPa [14psi]
Pressure [MPa]
Con-
=0.25 x Vout [V] - 0.125
nector
Pressure [psi]
=(0.25 x Vout [V] - 0.125) x 145
1 GND (Black)
2
Vout (White)
3
Vcc (DC5V) (Red)
Pressure
PS1
0~1.0 MPa [145psi]
Vout 0.5~4.5V
1 2 3
0.392V/0.098 MPa [14psi]
Pressure [MPa]
Con-
=0.25 x Vout [V] - 0.125
nector
Pressure [psi]
=(0.25 x Vout [V] - 0.125) x 145
GND (Black)
1
2
Vout (White)
3
Vcc (DC5V) (Red)
Check method
Refer to the section [8-
8-4 General Overview
on FCV Operation (In-
door unit)].
Resistance check
BS_03_L