Fujitsu AIRSTAGE ASEH09KHCBN Service Manual page 81

2-16. E: 44. Human sensor error
Indicator Indoor unit
Detective actuator Indoor unit main PCB
Forecast of cause
Check point 1. Check the connector connection and cable open
• Check if connector is loose or removed.
• Check erroneous connection.
• Check if sensor cable is open
Reset power when reinstalling due to removed connector or incorrect wiring.
Check point 2. Check the conduction or voltage
• Conduction check (sensor connections error)
Disconnect the sensor and check the 2-3 pin on sensor connector.
→ith conduction: Sensor failure
→ithout conduction: Main PCB failure
• Voltage check (sensor signal error)
Disconnect the sensor and check the voltage of 3 pin of the CN10 on the main PCB.
5 V: Sensor failure
Other than 5 V: Main PCB failure
2-16. E: 44. Human sensor error
Operation indicator
Timer indicator
Economy indicator
Error code
End
Continuous flash
1. Detect the open condition of the sensor.
2. →hen signal from sensor is "L" (0 V) for more than
20 min.
Connector connection failure
Main PCB failure
- (03-39) -
4 time flash
4 time flash
E: 44
Sensor failure
2. Troubleshooting with error code