9 TROUBLESHOOTING

9-1. TROUBLESHOOTING

<Error code display by self-diagnosis and actions to be taken for service (summary)>

Present and past error codes are logged and displayed on the wired remote controller or controller board of outdoor unit. Actions to be taken for service and the trouble reoccurrence at field are summarized in the table below. Check the contents below before investigating details.

Unit conditions at service

Error code

Actions to be taken for service (summary)

 

 

 

 

Displayed

Judge what is wrong and take a corrective action

 

according to “9-3. Self-diagnosis action table”.

The trouble is reoccurring.

 

 

 

 

Not displayed

Conduct troubleshooting and ascertain the cause of the

 

trouble according to “9-4. Troubleshooting by inferior

 

 

phenomena”.

 

 

 

 

 

Consider the temporary defects such as the work of

 

 

protection devices in the refrigerant circuit including

 

 

compressor, poor connection of wiring, noise and etc.

 

 

Re-check the symptom, and check the installation

 

 

environment, refrigerant amount, weather when the

 

Logged

trouble occurred, matters related to wiring and etc.

 

Reset error code logs and restart the unit after finishing

 

 

 

 

service.

 

 

There is no abnormality in electrical component,

The trouble is not reoccurring.

 

controller board,remote controller and etc.

 

 

 

 

Re-check the abnormal symptom.

 

 

Conduct trouble shooting and ascertain the cause of the

 

 

trouble according to “9-4. Troubleshooting by inferior

 

Not logged

phenomena”.

 

Continue to operate unit for the time being if the cause

 

 

is not ascertained.

 

 

There is no abnormality concerning of parts such as

 

 

electrical component, controller board, remote controller

 

 

and etc.

 

 

 

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Mitsumi electronic PKA-A12HA4, PKA-A18HA4 service manual Troubleshooting

PKA-A18HA4, PKA-A12HA4 specifications

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