8-11 Control Circuit; Control Power Supply Function Block - Mitsubishi Electric HP120TNU-A Service Handbook

[8-11 Control Circuit ]

8-11 Control Circuit

8-11-1

Control Power Supply Function Block

1) YNU
Noise filter board
Noise filter
TB1
AC Power source
YNU: 460 VAC
Fuse
Power-supply
terminal block
Surge protector
Filter board
Noise filter
Control board
Fuse
Solenoid valve
Four-way valve
Relay/LEV
drive circuit
72C
LEV
USB circuit
TB7
Terminal block for
transmission line
CN40
for centralized control
(24-30 VDC)
TB3
Indoor/outdoor
transmission block
(24-30 VDC)
TB2
Terminal block for
power source
TB15
Terminal block
for MA remote
TB5
controller
To next unit
(Indoor unit)
Terminal block
for transmission
line connection
17-30 VDC
A, B
17-30 VDC
A, B
9-12 VDC
* 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.)
HWE18220_GB
Inverter board
Rectifier
Fuse
Transformer box
Transformer Transformer
Power-supply board
Inverter-
reset circuit
Rectifier
DC-DC
converter
Microcomputer
DC-DC
converter
Circulating fan
control circuit
DC-DC
converter
3.3 V
Regulator
power supply
5 V DC-DC
converter
power supply
Transmission
power-supply
detection circuit
Indoor unit
ME remote
controller
MA remote
controller
AC power source (YNU: 460 VAC)
Control system (5-30 VDC)
DCL 72C Smoothing capacitor Inverter
Inverter
drive circuit
5 V power supply
Microcomputer
FAN board
18 V power supply Fuse
17 V power supply
30 V power supply
5 V power supply
24 V power supply
FAN board
12 V power supply
Fuse
9 V power supply
Relay drive circuit
5 V power supply
Circulating fan
Compressor
Heat exchanger fan
Inverter
Inverter
drive circuit
Microcomputer
Inverter Heat exchanger fan
Inverter
drive circuit
Microcomputer
57
chapter 8 -