Mitsubishi Heavy Industries FDC508HES3 Owner's Manual download pdf (Page 33)

Red LED

Green LED

4 time flashes

1 time flash

Outdoor unit

Did 63H

,operate?

Defective outdoor unit PCB

Replacement (Defective 63H

input circuit)

YES

At 63H

operation

1. During cooling

• Is the outdoor unit fan motor operating?

• Is there no short circuit air circulation for thr outdoor

unit?

• Is there sufficient space for air inlet & outlet?

2. During heating

• Is the gas side service valve fully opened?

• Is the indoor unit heat exchanger sensor detached

from the detector case?

• Is the filter clogged?

• Is the outdoor unit fan controlled by due to defective

63H

3. During colling/heating

• Is the refrigerant charge excessive?

At 49C operation

During cooling/heating

• Isn't there insufficient refrigerant?

(Isn't there gas leakage?)

• Isn't there a missing phase (

1 or

2 phase)?

63H1, 49C operation (Only case of FDC808, 1008 type)

Red LED

Green LED

5 time flashes

1 time flash

Outdoor unit

Failure to open the service valve

This abnormality will be indicated only when the compressor is ON for the time after turning on the power. (Refer to page 331)

High pressure error [63H1] (Only case of FDCP208~508 type)

Outdoor unit

Red LED

Green LED

4 time flashes

1 time flash

Did 63H

operate?

Defective outdoor unit PCB

Replacement (Defective 63H

input circuit)

YES

• Is the outdoor unit fan motor operating?

• Is there no shortcircuit in the outdoor unit?

• Is sufficient space reserved for suction or discharge?

• Is not the refrigerant charge excessive?

At 63H1 opration

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Mitsubishi Heavy Industries FDC508HES3 Owner's Manual Page 33

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