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MAINTENANCE
4
4.3 Troubleshooting Flowcharts
Troubleshooting Flow Chart of Main Control Malfunction
E1 High Pressure Protection
E2 Freeze Protection
Freeze protection is a normal protection, but not an abnormal malfunction. If freeze protection occurs
frequently during operation, check if the indoor lter is blocked with dirt and debris, or check if the indoor air
outlet is abnormal. The user must clean the lter and check the air outlet and air return pipe periodically to
ensure smooth operation.
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