Mitsubishi Electronics PCA-A24GA service manual Troubleshooting

10 TROUBLESHOOTING

10-1. 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 inferior phenomenon 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 “SELF-DIAGNOSIS ACTION TABLE” (10-2).
The inferior phenomenon is
reoccurring.		Identify the cause of the inferior phenomenon and take
	Not displayed	a corrective action according to “TROUBLESHOOTING
		BY INFERIOR PHENOMENA ” (10-3).
		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	inferior phenomenon occurred, and wiring related.
		Reset error code logs and restart the unit after finishing
		service.
		There is no abnormality in electrical components,
The inferior phenomenon is		controller boards, and remote controller.
not reoccurring.		Recheck the abnormal symptom.
		Identify the cause of the inferior phenomenon and take
		a corrective action according to “TROUBLESHOOTING
	Not logged	BY INFERIOR PHENOMENA ” (10-3).
		Continue to operate unit for the time being if the cause
		is not ascertained.
		There is no abnormality in electrical components,
		controller boards, remote controller etc.

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