Panasonic CS/CU-TU18ZKY Series - Troubleshooting; Common Symptoms and Causes; Pre-Servicing Checks and Non-Serviceable Issues

The unit stops and some alpha-numeric codes
appear on IDU display.
Unit’s Wi-Fi connection with the router is activated.Wi-Fi LED stays ON during unit turn OFF.
Check unit’s Wi-Fi connection with router.Wi-Fi LED continuously blinking.
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