Sharp AE-XM24HR, Service Manual

Page: 9 / 50

AEXM24HR
2 – 1
AEXM24HR
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
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
1 A
Fuse
20 A
Fuse
2 A
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)
THERML Fuse circuit
THERML Fuse in terminal board
CN5
㧔+2/