Fujitsu ASU9RL Service Instruction

Trouble shooting 4
INDOOR UNIT
INDOOR UNIT Error Method:
Indicate or Display:
Outdoor Unit : No indication
Indoor Unit : Operation LED : 2 times, Timer LED : 3 times
ERROR CODE : [E : 04]
Detective Actuators:
Detective details:
Forecast of Cause :
Check Point 2 :
31.739.649.762.980.3103134176Resistance Value (k )
Temperature
OKOK
OK
17.120.825.6Resistance Value (k )
Temperature
Indoor Heat Exchanger Temperature
Sensor Error
Indoor Unit Controller PCB Circuit
Heat Exchanger Temperature Thermistor
When Heat Exchanger Temperature Thermistor open or short-circuit is
detected at power ON.
1. Connector connection failure 2.Thermistor failure 3. Controller PCB 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)
If the voltage does not appear, replace Controller PCB.
06-08
THERMISTOR
(PIPE TEMP.)
THERMISTOR
(ROOM TEMP.)
BLACK BLACK BLACK BLACK
CN4
1 2 3 4
1 2 3 4
95°F
(35°C)
86°F
(
30°C)
77°F
(
25°C)
68°F
(20°C)
59°F
(15°C)
50°F
(10°C)
41°F
(5°C)
32°F
(0°C)
122°F
(
50°C)
113°F
(45°C)
104°F
(
40°C)

Fujitsu ASU9RL Specifications

General

Brand	Fujitsu
Model	ASU9RL
Category	Air Conditioner
Language	English