Fujitsu AB*G14LVTA Service Instructions Manual page 59

Universal floor / ceiling slim duct / compact cassette compact wall mounted / wall mounted / floor inverter multi
Hide thumbs Also See for AB*G14LVTA:
Table of Contents

Advertisement

Trouble shooting 19
OUTDOOR UNIT Error Method:
Heat ex. thermistor error
Detective Actuators:
Outdoor unit Main PCB
Heat exchanger temperature thermistor
Forecast of Cause :
1. Connector connection 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.
OK
OK
Check Point 2 : Remove connector and check Thermistor resistance value
Check Point 2 :
Thermistor Characteristics (Approx. value)
Temperature(°C)
Resistance Value (k )
Temperature(°C)
Resistance Value (k )
If Thermistor is either open or shorted, replace it and reset the power.
OK
OK
Check Point 3 :
Check Point 3 : Check voltage of Main PCB (DC5.0V)
Make sure circuit diagram of outdoor unit and check terminal voltage at Thermistor (DC5.0V)
1 2
1 2
CN25
CN26
If the voltage does not appear, replace Main PCB.
Indicate or Display:
Refer to error code table.
Detective details:
When the heat exchanger temperature thermistor open or short-circuit is
detected at power ON or while running the compressor.
2.Thermistor failure
-30
-20
-10
0
95.6
50.3
27.8
16.1
60
70
80
1.2
0.8
0.6
1 2
1 2
1 2
CN23
CN22
CN21
02-22
3. Main PCB failure
10
20
30
40
9.6
6.0
3.8
2.5
50
1.7
DC

Advertisement

Table of Contents
loading

Table of Contents