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4.7 System troubleshooting procedure
(1) Basics of troubleshooting
Basic troubleshooting is to check/analyze/save data by connecting the maintenance PC.
Whenever arriving at the site, always connect the maintenance PC before starting work.
Method of error data analysis (Basic procedure)
• Identify whether particular error occurred during operation or operation is stopped.
• Is it caused by the installation conditions of outdoor/indoor unit? (Refrigerant quantity, pipe length, short-circuit, clogged
filter, etc.)
• Isn’t there any beginner’s mistake at the installation? (Wrong address, mistake in piping or wiring, etc.)
• Is the failure related to any hardware (parts)? (SV main body, coil, capillary, check valve, sensor, etc.)
• Is it a component requiring close attention?
Compressor, inverter PCB and outdoor unit DC fan motor
• Is it a failure of electric equipment part?
Error on
indoor unit or
outdoor unit?
Indoor unit
Outdoor unit
Is the remote
controller
connected?
Was the power
supply reset after the
error occurred?
Save the momentary data just
before error occurrence,
retained in the remote controller.
Collected data 30 minutes
before error occurence are
saved in the maintenance PC.
Connect the
maintenance PC
and resume operation.
Momentary data just
before error occurrence
are saved in the
maintenance PC.
Connect the
maintenance PC
and resume operation.
Connect the
maintenance PC
and resume operation.
Connect the
maintenance PC
and resume operation.
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