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Fujitsu Manuals
Air Conditioner
AirStage AB12
Service manual
Microprocessor Block Diagram - Fujitsu AB12 Service Manual
Multi air conditioning system for buildings vrf (freely selectable multi type system)
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Service manual
(163 pages)
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
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4-2 MICROPROCESSOR BLOCK DIAGRAM
INDOOR UNIT
Power supply
ROOM THERMISTER(CN19)
PIPE INLET/IMEDIATE
/OUTLET THERMISTER(CN20)
OUTLET THERMISTER(CN21)
FAN FEEDBACK
(CN16)
DIP SW(SW1-4)
ROTARY SW(SW5,7,9)
FLOAT SW(CN15)
TEST(CN18)
(CN24)
COMMUNICATION
PWB.(CN26)
(CN24)
Wired remote
controller(CN17)
(CN25)
FILTER CIRCUIT
MICROPROCESSOR
POWER DETECTION
CIRCUIT
TEMPERATURE
DETECTION CIRCUIT
FAN ROTATION
READ CIRCUIT
SWITCH
READ CIRCUIT
FLOAT SWITCH
INPUT CIRCUIT
TEST INPUT
CIRCUIT
EXTERNAL INPUT
CIRCUIT
COMMUNICATION
CIRCUIT
EEPROM
FLASH WRITE
CIRCUIT
RESET CIRCUIT
OSCILLATOR
CIRCUIT
WIRED REMOTE
CONTROLLER
READ CIRCUIT
FLASH WRITE
CIRCUIT
RESET CIRCUIT
OSCILLATOR
CIRCUIT
MICROPROCESSOR
– 26 –
RECTIFICATION
DC-DC CONVERTER
SMOOTHING
5V,12V,14V
CIRCUIT
ACTUATOR
DRIVE CIRCUIT
SP MOTOR
DRIVE CIRCUIT
INDICATOR
DISPLAY OUTPUT
EXTERNAL OUTPUT
AUXILIARY
HEATER OUTPUT
COMMUNICATION
BUZZER OUTPUT
FAN MOTER(CN4)
DRAIN PUMP(CN5)
SV(CN6)
LOUVER(CN10,CN11)
EEV(CN14)
INDICATOR
DISPLAY(CN13)
(CN22)
AUXILIARY
HEATER(CN12)
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Table of Contents
Troubleshooting
TROUBLESHOOTING
84
ERROR CODE & TROUBLESHOOTING
91
OUTDOOR UNIT TROUBLESHOOTING
96
CENTRAL REMOTE CONTROLLER TROUBLESHOOTING
109
TROUBLESHOOTING (NO ERROR CODE)
114
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This manual is also suitable for:
Ab14
Ab24
Ab30
Ab36
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Ab54
Ar7
Ar9
Ar12
Ar18
Ar14
Ar25
Ar30
Ar36
Ar45
Ar36h
Ar45h
Ar60h
Au7
Au9
Au12
Au14
Au18
Au20
Au25
Au30
Au36
Au54
Au45
As14
As24
As20
As30
Aoy90
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