Outdoor Unit (Inverter Assembly) - Toshiba RAS-M10UKV-E3 Service Manual

7-2. Outdoor Unit (Inverter Assembly)

RAS-4M27YAV-E, RAS-4M27YACV-E, RAS-3M26YAV-E
Outdoor air temp. Sensor
A unit P.M.V.
B unit P.M.V.
C unit P.M.V.
1 D unit P.M.V.
*
2
* 4-Way valve
Outdoor
fan
motor
Compressor
NOTE : * 1 : 4 unit multi model only
Gas side pipe temp. Sensor
Driver
circuit of
P.M.V.
Relay circuit
Inverter
(DC AC)
Over current
sensor
Noise filter
Input current
sensor
Converter
(AC DC)
Over current
sensor
Inverter
(DC AC)
Output current
sensor
P.M.V : Pulse modulating valve
PWM : Pulse width modulation
* 2 : Heat pump model only
2
*
Suction temp. Sensor Evaporator temp. Sensor
M.C.U
• Inverter outdoor frequency control
• A/D converter function
• P.M.V. control
• Discharge temp. control
• Error display
• Signal communication to MCU
• PWM synthesis function
Rotor position
detect circuit
Gate drive
circuit
Over current
detect circuit
Clock frequency
oscillator circuit
10MHz
High power factor
correction circuit
Over current
detect circuit
Gate drive
circuit
– 49 –
Discharge temp. Sensor
MCC-818 (SUB-P.C. B)
Clock frequency
oscillator circuit
16MHz
Signal communication
to MCU
220–240V, 50/60Hz
MCC-1359 (MAIN-P.C. B)
M.C.U (DSP)
• 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
IGBT : Insulated gate bipolar
transistor
DSP : Digital signal processor
A unit
send/receive
circuit
B unit
send/receive
circuit
C unit
send/receive
circuit
D unit
send/receive
circuit
1
*