Troubleshooting 32 - Outdoor Unit Error Method: Suction Gas Temp. Sensor Error - Fujitsu Airstage V series Service Manual

Trouble shooting 32
OUTDOOR UNIT Error Method:
Suction Gas Temp. Sensor Error
Detective Actuators:
Outdoor Unit Controller PCB circuit
Suction Gas Temperature Thermistor
Forecast of Cause : 1. Connector connection failure 2. Thermistor failure 3. Controller PCB failure
Check Point 1 : Check connection of Connector
p Check if connector is loose or removed
p Check erroneous connection
p Check if thermistor cable is open
>>Reset Power when reinstalling due to removed connector or incorrect wiring.
OK
Check Point 2 : Remove connector and check Thermistor resistance value
Thermistor Characteristics (Rough value)
Temperature (°C)
Resistance Value ( )
If Thermistor is either open or shorted, replace it and reset the power.
OK
Check Point 3 : Check voltage of Controller PCB (DC5.0V)
Make sure circuit diagram of each indoor unit and check terminal voltage at Thermistor (DC5.0V)
Outdoor Unit Schematic(CN27)
Suction Gas Temp. Thermistor(CN27:1-2)
Outdoor Temp. Thermistor(CN27:3-4)
Discharge Thermistor 1 (CN27:5-6)
Discharge Thermistor 2 (CN27:7-8)
Discharge Thermistor 3 (CN27:9-10)
If the voltage does not appear, replace Controller PCB and reset the original address.
Indicate or Display:
Outdoor Unit : LED1 Flash, LED3
Indoor Unit : Operation LED Blink,
ERROR CODE : E : 32
Detective details:
When Suction Gas Temperature Thermistor is detected as SHORTED or
OPEN.
-10 -5.0 0
27.5 20.9 16.1
11 Times Blink
Timer LED 3 Time Blinks,
Swing LED 3 Time Blinks
5.0 10 15.0
12.4 9.7 7.7
DC
06-43
20 25.0 30
6.1 4.9 3.9