AEX2M14LR
2 – 1
AEX2M14LR
Service Manual
CHAPTER 2.
EXPLANATION OF CIRCUIT AND OPERATION
[1] BLOCK DIAGARM
CPU
Pump down switch circuit
Unit A thermo. circuit
Unit B thermo. circuit
Thermistor unit A
Thermistor unit B
Compressor
CN8A
CN8A
CN8A
Suction thermistor CN8C
CN5
Expansion valve A drive circuit
Expansion valve B drive circuit
4-way valve relay drive circuit
4-way valve
Wire check switch circuit
Position detection circuit
Thermal fuse in terminal board
Thermal fuse circuit
LED drive circuit
Heat exchanger pipe thermo. circuit
Compressor thermo. circuit
CPU reset circuit
Serial I/O circuit
Power transistor module drive circuit
Outdoor fan motor drive circuit
Power supply circuit
Expansion valve A
Expansion valve B
Expansion valve C
CPU oscillator circuit
AC overcurrent detection
DC overcurrent detection circuit
LED
Heat exchanger pipe thermistor
Compressor thermistor
Current transformer
Compressor
Power transistor module
Outdoor fan motor
Smoothing circuit
Active filter circuit
Filter circuit
AC power
Unit - unit wiring
(AC power and serial
signals)
20 A
Fuse
1 A
Fuse
Outdoor temp. thermo. circuit
Outdoor temperature thermistor
20 A
Fuse
2 A
Fuse
3.15 A
Fuse
Expansion valve C drive circuit
DC power supply circuit
(RE)
(OR)
(G)
(BL)
(WH)
Suction pipe thermistor
CN8A
Suction pipe thermo. circuit
(BK)
DC over voltage detection circuit
Heat sink thermistor
CN8B
Heat sink thermo. circuit
(BK)
Summary of Contents for AE-X2M14LR
Page 32: ...AEX2M14LR 5 6 MEMO ...