Fujitsu AOU24RML1 User Manual

Trouble shooting 4
INDOOR UNIT
INDOOR UNIT Error Method:
Indicate or Display:
Refer to error code table.
Detective Actuators:
Detective details:
Forecast of Cause :
Check Point 2 :
31.7
95°F
(35°C)
39.6
86°F
(30°C)
49.762.980.3103134176Resistance Value (k )
77°F
(25°C)
68°F
(20°C)
59°F
(15°C)
50°F
(10°C)
41°F
(5°C)
32°F
(0°C)
Temperature
OKOK
OK
17.120.825.6Resistance Value (k )
122°F
(50°C)
113°F
(45°C)
104°F
(40°C)
Temperature
Indoor Heat Exchanger Temperature
Thermistor Error
Indoor Unit Control PCB (AS, AR) ,
Main PCB (AU) or Room Temperature
Thermistor
When Heat Exchanger Temperature Thermistor open or short-circuit is
detected at power ON.
1. Connector connection failure 2.Thermistor failure 3. Control PCB (AS,AR),MainPCB (AU) failure
Check Point 1 : Check connection of Connector
Check if connector is removed.
Check erroneous connection.
Check if thermistor cable is open.
>>Upon correcting the removed connector or mis-wiring, reset the power.
Check Point 2 : Remove connector and check Thermistor resistance value
Thermistor Characteristics (Approx. value)
If Thermistor is either open or shorted, replace it and reset the power.
Check Point 3 : Check voltage of Controller PCB (DC5.0V)
Make sure circuit diagram of indoor unit and check terminal voltage at Thermistor (DC5.0V)
02-11
THERMISTOR
(PIPE TEMP.)
THERMISTOR
(ROOM TEMP.)
GRAY
GRAY
BLACK
BLACK
If the voltage does not appear, replace Controller PCB(AS, AR), Main PCB(AU).
1
2
1
2
CN5 CN6 (AS)
CN8 CN7 (AR) CN8 CN5 (AU)

Fujitsu AOU24RML1 Specifications

General

Brand	Fujitsu
Model	AOU24RML1
Category	Air Conditioner
Language	English