Outdoor Unit (Inverter Assembly) - Toshiba RAS-M10PKVP-E Service Manual

8-2. Outdoor Unit (Inverter Assembly)

RAS-4M27UAV-E
Outdoor air temp. sensor Gas side pipe temp. sensor
A unit P.M.V.
B unit P.M.V.
circuit of
C unit P.M.V.
P.M.V.
D unit P.M.V.
Noise filter
Input current
sensor
High power factor
correction circuit
Converter
(AC DC)
Inverter Gate drive
(DC AC)
Output current
sensor
Compressor
• Inverter outdoor frequency control
• A/D converter function
• P.M.V. control
Driver
• Processing (Temp. processing)
• Error display
• Serial signal communication with indoor unit
• Signal communication with main P.C. board
• Function select
Function select
• PWM synthesis function
• Input current release control
• IPM over current detect control
• High power factor correction control
• Signal communication with
control P.C. board
• Fan motor control
• Compressor motor control
circuit
Output current
Suction temp. sensor Evaporator temp. sensor
M.C.U
Clock frequency
oscillator circuit
20 MHz
Signal communication
M.C.U 1
Inverter Gate drive
(DC AC) circuit
sensor
Outdoor
P.M.V : Pulse motor valve
fan motor
PWM : Pulse width modulation
IPM : Intrlligent power module
– 53 –
Discharge temp. sensor
MCC-5071 (CONTROL P.C. B)
A unit serial signal
communication circuit
B unit serial signal
communication circuit
C unit serial signal
communication circuit
D unit serial signal
communication circuit
220–240V
220V
MCC-1571 (MAIN P.C. B)
M.C.U 2
• Signal communication with
control P.C. board
• 4-way valve control
Clock frequency
oscillator circuit
8 MHz
Relay circuit
Clock frequency
oscillator circuit
20 MHz
4-way valve
~
50Hz
~
60Hz