Daikin FT25JV1B Installation Manual download pdf (Page 25)

Is value of each temperature

thermistor close to measured

value?

Securely connect the

connectors to check

operation.

YES

Is abnormal value shown when

exceeding a certain temperature

during operation?

Repair soldering.

Replace the PC board.

Are connectors of

thermistor securely

connected?

Is PC board soldered

properly? (connector

section of thermistor)

Replace the thermistor.

Malfunction 7-9: Error code “C4”,”C9”,”J6”,”H9” (Malfunction of

thermistors) is displayed.

Possible

causes

Ԙ Faulty thermistor

ԙ Disconnection of connector

Ԛ Poor soldering of PC board

ԛ Faulty PC board

(Reference)

This malfunction is automatically reset. If the malfunction is present even in stop mode,

disconnection of thermistor, poor soldering inside PC board, or affixed foreign matter, etc. are

presumed. Judge by measuring the resistance of thermistor. If the malfunction has been reset when

servicing, operate the unit while comparing the actual temperature measured at the thermistor

position to the reading of the transmission monitor to check for the difference in temperature.

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 31

No comments

Daikin FT25JV1B Installation Manual Page 25