Daikin FT25JV1B Installation Manual download pdf (Page 14)

Procedure of Indoor Unit Diagnosis

If LED-B (green) on indoor unit PC board is off, the transmission wiring between

indoor

and outdoor unit is incorrect or disconnected.

Green Blinks when normal

LED on

䃂

LED off

LED blinks

䋭

No connection with

diagnosis

Green

Contents Diagnosis method

Normal 㸢 Outdoor unit

䋭

(Note) Malfunction 7-1

䃂

䋭

Malfunction of power supply or (Note) Malfunction 7-2

Faulty indoor unit PC board

Malfunction 7-3

䃂

If outdoor unit’s LED-A blinks, faulty indoor unit PC board Malfunction 7-4

(Note) If the LED display is reproduced by turning on the power supply, indoor unit PC board is faulty.

Procedure of Outdoor Unit Diagnosis

Green Blinks when normal

LED on

Contents Diagnosis method

䃂

LED off

Normal 㸢 Indoor unit 䋭

LED blinks

(Note 1) Malfunction 7-5

䋭

No connection with

diagnosis

䃂

Malfunction of power supply or (Note 2) Malfunction 7-6

㸢

䃂

Blinks right after the power supply is turned on,

then off after that.

Malfunction 7-6

(Note 1)

If LED display is reproduced by turning the power supply back on, outdoor unit PC board 1 is faulty.

(only on unit equipped with PC board 1 and 2)

(Note 2) If LED display is reproduced by turning the power supply back on, when turning the power supply

off again and then turning the power supply back on with the transmission wire No.2 disconnected

(No. 1 and 3 are power supply voltage units.)

If LED-A goes out, outdoor unit PC board (See Note 1) is faulty.

If LED-A blinks, indoor unit PC board faulty.

STEP 1: Diagnosis of incorrect or disconnected transmission wiring

STEP 2: Diagnosis of other than incorrect or disconnected transmission wiring

Micro

Computer

Normal

Monitor

LED-A

Transmissi

Normal

Monitor

LED-B

Micro

Computer

Normal

Monitor

LED-A

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Daikin FT25JV1B Installation Manual Page 14

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