9-4. TROUBLESHOOTING BY INFERIOR PHENOMENA

Note: Refer to the manual of outdoor unit for the detail of remote

 

controller.

 

Phenomena

Cause

Countermeasure

(1)Upward/downward vane

The vane is not downward during defrosting and heat

Normal operation (The vane is set to

performance failure

preparation and when the thermostat is OFF in HEAT

horizontal regardless of remote control.)

 

mode. (Working of COOL protection function)

Check (left).

 

Vane motor does not rotate.

 

• Defective vane motor

• Check the vane motor. (Refer to “How

 

• Breaking of wire or connection failure of connector

to check the parts”.)

 

 

• Check for breaking of wire or connec-

 

 

tion failure of connector.

 

Upward/downward vane does not work.

Normal operation (Each connector on

 

• The vane is set to fixed position.

vane motor side is disconnected or set-

 

 

ting the fixed vanes by wired remote

 

 

controller.)

 

 

 

(2)Receiver for IR wireless remote

Weak batteries of IR wireless remote controller

Replace batteries of IR wireless remote

controller

 

controller.

 

Contact failure of connector (CNB) on IR wireless

~

 

remote controller board

Check contact failure of each connector.

 

(Insert failure)

If no problems are found of connector,

 

Contact failure of connector (CN90) on indoor con-

replace indoor controller board.

 

troller board (Insert failure)

When the same trouble occurs even if

 

Contact failure of connector between IR wireless

indoor controller board is replaced,

 

remote controller board and indoor controller board

replace IR wireless remote controller

 

 

board.

 

 

 

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Mitsubishi Electronics PKA-A30KA4.TH, PKA-A36KA4.TH Troubleshooting by Inferior Phenomena, Performance failure, Controller

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