Repair Section
59
8.3 Troubleshooting Chart
• To accurately troubleshoot the problem, it is important to carefully confirm the nature of the
problem. Common problems are:
- Insufficient cooling or heating.
- Unit does not operate.
- Overflow of drain water.
- Abnormal noise or vibrations.
(1) Insufficient cooling or heating
• Cooling or heating system problem generally results from electrical or mechanical components
such as fan motor, compressor, control switch.
• There is a possibility of insufficient cooling or heating due to clogging of the air filters. So make
sure to first check if the air filters are clogged or not.
• Check the power supply because of the possibility of power source failure.
• Check the installation site for operating temperature and installation space (unobstructed airflow).
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