Toshiba RAS-M10YKV-E Service Manual page 27

RAS-M18YACV-E
CONTROL BLOK DIAGRAM (Outdoor unit)
MCC-775 (SUB P.C.B)
A unit
send/receive
circuit
Discharge
M.C.U
temp. sensor
• Inverter output frequency control
Suction temp.
• A/D converter function
sensor
• P.M.V. control
Gas side pipe
• Discharge temp. control
temp. sensor
• Error display
• Signal communication to MCU
Outdoor air
temp. sensor
Driver circuit of P.M.V.
A unit
P.M.V.
P.M.V. : Pulse Modulating Valve
PWM : Pulse Width Modulation
IGBT : Insulated Gate Bipolar Transistor
220–230–240 V ~ 50 Hz
B unit
send/receive
circuit
• PWM synthesis function
• Input current release control
• IGBT over-current detect control
• Outdoor fan control
• High power factor correction control
• Signal communication to MCU
Noise
filter
B unit
P.M.V.
MCC-758 (MAIN P.C.B)
M.C.U
High power factor Over current
correction circuit detect circuit
Converter
Input current
(AC DC)
Sensor
Rotor position
detect circuit
Rotor position
detect circuit
Gate drive
circuit
Over current
detect circuit
Gate drive
circuit
Over current Inverter
sensor (DC AC)
Over current Inverter
sensor (DC AC)
Outdoor
fan motor
Compressor