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8-2. Outdoor Unit (Inverter Assembly)
Driver circuit
of PMV
Relay
circuit
Clock
frequency
4MHz
Converter
(AC → DC)
Inverter
(DC → AC)
Inverter
(DC → AC)
Input current
sensor
High Power
factor Correction
circuit
CONTROL BLOCK DIAGRAM
For INDOOR UNIT
Heat exchanger
temp.sensor
Suction
temp. sensor
Outdoor air
temp. sensor
Discharge
temp. sensor
Indoor unit
send/receive
circuit
Noise
Filter
MCC5009 (PCB)
• PWM synthesis function
• Input current release control
• IGBT over-current detect control
• Outdoor fan control
• High power factor correction control
• Inverter output frequency control
• A/D converter function
• PMV control
• Discharge temp. control
• 4-way valve control
• Signal communication to indoor unit
PMV : Pulse Motor Valve
MCU : Micro Controller Unit
Outdoor
Fan motor
Compressor
OUTDOOR UNIT
PMV
4-way
valve
Gate drive
circuit
Current
detect
Current
detect
Gate drive
circuit
M.C.U.
FILE NO. SVM-12002
Power Supply
(From Outdoor Unit)
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