SERVICE MANUAL - Alarko Carrier
SERVICE MANUAL - Alarko Carrier
SERVICE MANUAL - Alarko Carrier
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8-2. Outdoor Unit (Inverter Assembly)<br />
RAS-4M27GAV-E, RAS-4M27GACV-E, RAS-3M26GAV-E<br />
Outdoor air temp. Sensor<br />
Gas side pipe temp. Sensor Suction temp. Sensor Evaporator temp. Sensor<br />
Discharge temp. Sensor<br />
A unit P.M.V.<br />
B unit P.M.V.<br />
C unit P.M.V.<br />
* 2<br />
* 1 D unit P.M.V.<br />
• Error display<br />
• Signal communication to MCU<br />
* 2 4-Way valve<br />
Relay circuit<br />
• PWM synthesis function<br />
Clock frequency<br />
Outdoor<br />
fan<br />
motor<br />
Inverter<br />
(DC ® AC)<br />
Over current<br />
sensor<br />
Driver<br />
circuit of<br />
P.M.V.<br />
M.C.U<br />
• Inverter outdoor frequency control<br />
• A/D converter function<br />
• P.M.V. control<br />
• Discharge temp. control<br />
Rotor position<br />
detect circuit<br />
Gate drive<br />
circuit<br />
Over current<br />
detect circuit<br />
oscillator circuit<br />
16MHz<br />
Signal communication<br />
to MCU<br />
MCC-818 (SUB-P.C. B)<br />
A unit<br />
send/receive<br />
circuit<br />
B unit<br />
send/receive<br />
circuit<br />
C unit<br />
send/receive<br />
circuit<br />
D unit<br />
send/receive<br />
circuit<br />
* 1<br />
220–240V ~50Hz<br />
220V ~60Hz<br />
Noise filter<br />
Input current<br />
sensor<br />
Converter<br />
(AC ® DC)<br />
Clock frequency<br />
oscillator circuit<br />
10MHz<br />
High power factor<br />
correction circuit<br />
MCC-1438 (MAIN-P.C. B)<br />
M.C.U<br />
• PWM synthesis function<br />
• Input current release control<br />
• IGBT over current detect control<br />
• High power factor correction control<br />
• Signal communication to MCU<br />
• Output current release control<br />
• A/D converter function<br />
Over current<br />
sensor<br />
Over current<br />
detect circuit<br />
Inverter<br />
(DC ® AC)<br />
Gate drive<br />
circuit<br />
Output current<br />
sensor<br />
Compressor<br />
P.M.V : Pulse motor valve<br />
PWM : Pulse width modulation<br />
IGBT : Insulated gate bipolar<br />
transistor<br />
NOTE) ∗1 : 4 unit multi model only.<br />
∗2 : Heat pump model only.<br />
– 47 –
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