Functions Of The Major Components Of Hydro Unit - Mitsubishi Electric PUHY-M200YNW-A1 Service Handbook

[3-7 Functions of the Major Components of Hydro Unit ]

3-7

Functions of the Major Components of Hydro Unit

Part name Symbols
Solenoid SV1
valve
LEV LEV1
Thermistor TH11,13
TH32,35
Pressure Prf
sensor
PWD
PWS
Pump WP1
Water PRV
pressure
protection
valve
BS_03_E
Notes Usage
Refriger- Opens when the heat exchanger
ant side is not in operation (during freeze
protection, bypass defrost)
Refriger- Supplies refrigerant to Heat ex-
ant side change
Refriger- Compressor frequency control
ant side
Water Water pump discharge/suction
side water temperature
Refriger- 1) Detects refrigerant pressure
ant side 2) LEV control
Water 1) Detects water discharge pres-
side sure
2) Water control
Water 1) Detects water suction pres-
side sure
2) Water control
Water Temperature difference control
side Controls the water flow to each
indoor unit
Water Trips when the internal pressure
side in the water circuit rises
Specifications
AC220-240V
Open when energized/
closed when defrost
DC12V
Opening of a valve driven by
a stepping motor
0~3000 pulses
Degree Celsius
R = 7.465k
120
R = 4057
25/120
1 1
R = 7.465 exp
4057
t
393
0°C[32°F]: 15kohm
10°C[50°F]: 9.7kohm
20°C[68°F]: 6.4kohm
25°C[77°F]: 5.3kohm
30°C[86°F]: 4.3kohm
40°C[104°F]: 3.1kohm
Pressure
Prf
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
PW
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)
200V (3 phase)
Frequency: 30-60Hz
Operating pressure:
800kPa
Check method
Continuity check
with a tester
Continuity check
with a tester
Continuity be-
tween white, red,
and orange.
Continuity be-
tween yellow,
brown, and blue.
White
M
Red
Orange
Yellow Brown Blue
Resistance
check
21
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