Service manual

AE-XM30GR
2 – 1
AE-XM30GR
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
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
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 relay
drive circuit
Power supply
circuit
Expersion valve D drive circuit Expansion valve D
Expansion valve A
Expansion valve B
Expansion valve C
CPU oscillator circuit
AC overcurrent detection
circuit
DC overcurrent detection
circuit / Power transistor
module overheat
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
Outdoor temp. thermo.
circuit
Outdoor temperature
thermistor
1A
Fuse
20 A
Fuse
2A
Fuse
3.15 A
Fuse
Expansion valve C
drive circuit
DC power
supply circuit
(RE)
(OR)
(N)
(BL)
(WH)
Unit C thermo. circuit Thermistor unit C
(BR)
Unit D thermo. circuit Thermistor unit D
(YE)
Suction pipe thermistor CN8A
Suction pipe thermo circuit
(BK)
DC over voltage
detection circuit
Heat sink thermistor CN8B
Heat sink thermo circuit
(BK)