Outdoor Unit (Inverter Assembly) - Toshiba RAS-M10YKV-E Service Manual

7-2. Outdoor Unit (Inverter Assembly)

RAS-4M27YAV-E, RAS-4M27YACV-E, RAS-3M26YAV-E
Outdoor air temp. Sensor Gas side pipe 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
Suction temp. Sensor
Driver
circuit of
P.M.V.
Relay circuit
Rotor position
detect circuit
Inverter
Gate drive
(DC AC)
circuit
Over current Over current
sensor detect circuit
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
*
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
Clock frequency
oscillator circuit
16MHz
Signal communication
to MCU
Clock frequency
oscillator circuit
• PWM synthesis function
10MHz
• Input current release control
• IGBT over current detect control
High power factor
correction circuit
• High power factor correction control
• Signal communication to MCU
• Output current release control
• A/D converter function
Over current
detect circuit
Gate drive
circuit
– 49 –
Discharge temp. Sensor
MCC-818 (SUB-P.C. B)
A unit
send/receive
circuit
B unit
send/receive
circuit
C unit
send/receive
circuit
D unit
send/receive
circuit
1
*
220–240V, 50/60Hz
MCC-1359 (MAIN-P.C. B)
M.C.U (DSP)
IGBT : Insulated gate bipolar
transistor
DSP : Digital signal processor