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Mitsubishi Electric PURY-P72 Service Handbook page 344

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Table of Contents
[ IX Troubleshooting ]
[YKMU-A]
Control Circuit (YKMU-A)
- 8 - Control Circuit (YKMU-A)
(1) Control power source function block
1) PURY-P72, P96YKMU-A
Noise filter
TB1
AC 460V
Terminal block for
power source
Surge protection
Trans Box
Control board
Solenoid valve
4-way valve
72C, LEV
12V Power supply
TB7
Terminal block for
transmission line
for centralized control
(DC 24 ~ 30 V)
TB3
Indoor/outdoor
transmission block
(DC 24 ~ 30 V)
M-NET
transmission line
(Non-polar 2 wire)
TB2
AC Power source
AC 220 / 240 V
Terminal block for
power source
TB15
Terminal block
for MA remote
TB5
To next unit
controller
(Indoor unit)
Terminal block
for transmission
line connection
DC 17 ~ 30 V
A, B
DC 17 ~ 30 V
A, B
DC 9 ~ 12 V
* MA remote controllers and ME remote controllers cannot be used together.
(Both the ME and MA remote controller can be connected to a system with a system controller.)
HWE1116D
INV board
Rectifier
Noise filter
Fuse
17V Power supply
Rectifier
Fuse
Fuse
Inverter reset
circuit
Microcomputer
16 V Power supply
Relay, LEV
Drive circuit
5 V Power supply
DC / DC converter
M-NET board
Detection circuit for
the power supply to
the transmission line
CN40
Indoor unit
ME remote
controller
MA remote
controller
Smoothing capacitor
Inverter
DCL
72C
Inverter drive
circuit
5 V Power supply
Microcomputer
Fan board
Fuse
63H1
5 V Power supply
Relay drive circuit
DC / DC
converter
30 V Power supply
Relay
- 335 -
Power source system (AC 230 / 460 V)
Control system (DC 5 ~ 30 V)
Compressor
Heat
Inverter
exchanger
fan
Inverter drive
circuit
Microcomputer
GB
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