Toshiba RAS-M18YACV-E - Page 27

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