Service manual

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A unit P.M.V.
A unit
send/receive
circuit
B unit
send/receive
circuit
C unit
send/receive
circuit
Clock frequency
oscillator circuit
16MHz
Clock frequency
oscillator circuit
10MHz
Outdoor
fan
motor
• Inverter outdoor frequency control
• A/D converter function
• P.M.V. control
• Discharge temp. control
• Error display
• Signal communication to MCU
• PWM synthesis function
M.C.U
• PWM synthesis function
• Input current release control
• IGBT over current detect control
• High power factor correction control
• Signal communication to MCU
• Output current release control
• A/D converter function
M.C.U
Discharge temp. SensorGas side pipe temp. SensorOutdoor air temp. Sensor
MCC-818 (SUB-P.C. B)
MCC-1438 (MAIN-P.C. B)
220–240V ~ 50Hz
220V
~ 60Hz
Driver
circuit of
P.M.V.
Signal communication
to MCU
Inverter
(DC AC)
Over current
sensor
Compressor
B unit P.M.V.
C unit P.M.V.
Noise filter
Over current
sensor
Inverter
(DC AC)
Output current
sensor
Input current
sensor
Converter
(AC DC)
P.M.V : Pulse motor valve
PWM : Pulse width modulation
IGBT : Insulated gate bipolar
transistor
Current detect
circuit
Gate drive
circuit
Over current
detect circuit
High power factor
correction circuit
Over current
detect circuit
Gate drive
circuit
8-2. Outdoor Unit (Inverter Assembly)
RAS-3M23GACV-E