Fujitsu AO G36KBTB Series Service Instruction page 67

1 phase type room air conditioner

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Table of Contents

Trouble shooting 23

OUTDOOR UNIT Error Method:

Compressor Temp. Thermistor Error

Detective Actuators:

Compressor temperature thermistor

Forecast of Cause :

1. Connector connection failure, open

2. Thermistor failure

3. Main PCB failure

Check Point 1 : Check the connector connection and cable open

Connector connection state check

Cable open check

Check Point 2 : Check the thermistor

Thermistor characteristics check

(Disconnect the thermistor from the PCB and check.)

* For the thermistor characteristics, refer to the "Service Parts Information 8".

Check Point 3 : Check voltage of Main PCB (DC5.0V)

Main PCB P10:1-3 voltage value =5V

Remove the thermistor from Main PCB, check the voltage.

P10

If the voltage does not appear, replace Main PCB,

and execute the check operation again.

Indicate or Display:

Error code : 72

Detective details:

Compressor temperature thermistor short or open detected

02-24

Outdoor unit :

Mode Error L1 L2

: Light OFF

: Light ON

n : n times blinking