Mitsubishi Electric CMB-WP108NU-AA Service Handbook page 163

[ VIII Troubleshooting ]
Control Circuit
-4- Control Circuit
(1) Control power source function block
1) PURY-(E)P72YNU-A
Noise filter board
Noise filter
TB1
AC Power source
Fuse
YNU: 460 VAC
Power-supply
terminal block
Surge protector
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)
TB1
AC Power source
AC 208/230 V
Terminal block for
power source
TB2
Terminal block
M-NET for transmission
transmission line line connection
(Non-polar 2 wire) DC 17 ~ 30 V
TB2
AC Power source
AC 208/230 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.)
HWE2206A
Inverter board
Rectifier
Fuse
Transformer box
Transformer Transformer
Power-supply board
Inverter-
reset circuit
Rectifier
DC-DC
converter
Microcomputer
DC-DC
converter
DC-DC
3.3 V
converter
Regulator
power supply
5 V DC-DC
power supply
converter
Transmission
power-supply
detection circuit
HBC controller
Indoor unit
ME remote
controller
MA remote
controller
- 152 -
AC power source (YNU: 460 VAC)
Control system (5-30 VDC)
Smoothing capacitor
DCL 72C Inverter
Inverter
drive circuit
5 V power supply Microcomputer
FAN board
Inverter
18 V power supply
Fuse
Inverter
17 V power supply
drive circuit
30 V power supply
5 V power supply Microcomputer
24 V power supply
12 V power supply
9 V power supply
Relay drive circuit
Compressor
Heat exchanger fan
GB