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2-7. E: 41. Room temperature sensor error (Indoor unit)

Indicator Indoor unit

Operation indicator 4 time flash

Timer indicator 1 time flash

Economy indicator Continuous flash

Error code E: 41

Detective actuator

Indoor unit main PCB

Room temperature thermistor is open or short is

detected always.

Room temperature thermistor

Forecast of cause

Connector failure

Thermistor failure

Main PCB failure

Check point 1. Check connection of connector

• Check if connector is loose or removed.

• Check erroneous connection.

• Check if thermistor cable is open

-> Reset power when reinstalling due to removed connector or incorrect wiring.

↓

Check point 2. Remove connector and check thermistor resistance value

• For the room thermistor resistance value, refer to "Thermistor resistance values"

on page 03-77.

• If thermistor is either open or shorted, replace it and reset the power.

↓

Check point 3. Check voltage of main PCB

Make sure circuit diagram of each indoor unit and check terminal voltage at thermis-

tor (DC 5.0 V).

NOTE: For details of thermistor connector, refer to "Wiring diagrams" in Chapter 2.

TECHNICAL DATA AND PARTS LIST on page 02-14.

If the voltage does not appear, replace main PCB.

↓

End

2-7. E: 41. Room temperature sensor error (Indoor unit) - (03-18) - 2. Troubleshooting with error code

TROUBLESHOOTING

Fujitsu AOUG15LZAS1 User Manual

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