Daikin E431

Alarm
Logic		 E431 Humidity sensor (HuS) is not functioning correctly
Possible
Causes
  • Setting are incorrect
  • Device malfunction
Sensor failure / Controller failure / Broken wire / Connector disconnected / short circuit
Trouble
Shooting
  • Check installing humidity sensor (optional)
*Humidity setting operation can not be set without connecting to humidity sensor
  • Check connector CN46 on CPU board for secure connection
  • Remove connector CN46, check if there is 5VDC from the controller
HuS:CN46 No.1-2-3 (Black-Yellow-Red) Black-Red : Input voltage 5VDC

  • If the input to transducer is 5VDC, replace the transducer. If the input is less than 5V, check the controller
Controller
Action		 E431 Alarm display only
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