Control Block Diagram - Toshiba RAS-2M21U2ACVG-SG Service Manual

Outdoor Unit (Inverter Assembly)
RAS-2M21U2ACVG-SG
Outdoor temp. sensor
A unit P.M.V.
B unit P.M.V.
MCC-1665
(Display-P.C.B)
LED
Tact-SW
Junper
Noise filter
Input current
Sensor
Converter
(AC→DC)
Inverter
(DC→AC)
Output current
sensor
Compressor

8. CONTROL BLOCK DIAGRAM

Gas side pipe temp. sensor
Driver
circuit
of P.M.V．
High power factor
correction circuit
Gate drive
circuit
M.C.U.
・Inverter outdoor frequency control
・A/D converter function
・P.M.V control
・Processing (Temp. Processing)
・Error display
・Serial Signal Communication with
indoor unit
・Signal Communication with MAIN-P.C.B
・Function select
Function select
Signal Communication
M.C.U.
・PWM synthesis function
・Input current release control
・IPM over current detect control
・High power factor correction control
・Signal Communication with Control-
P.C.B
・Fan motor control
・Compressor motor control
・High-pressure switch
・Case thermo
Inverter
(DC→AC)
Output current
sensor
Outdoor
fan motor
- 32 -
Discharge temp. sensor
MCC-1665 (Control P.C.B)
A unit Serial Signal
Communication
circuit
B unit Serial Signal
Communication
circuit
220-240V ～50Hz
220V ～60Hz
MCC-1645 (MAIN P.C.B)
High-pressure switch
Case thermo
Clock frequency
oscillator circuit
10MHz
Gate drive
circuit
P.M.V：Pulse motor valve
PWM ：Pulse width modulation
IPM ：Intelligent power module