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Power LED blinking (in Cooling Test Mode, Heating Only Activated)

Power LED blinking — Cooling Test Mode stopped during Heating Only Operation

Panasonic · CS-Z

What does Power LED blinking (in Cooling Test Mode, Heating Only Activated) mean?

If the unit is in 'Heating Only Operation' mode and 'Cooling Test Mode' is attempted, the unit will stop, and the Power LED will blink.

Common Causes

  • Cooling Test Mode is not compatible with 'Heating Only Operation' mode

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the current operational mode setting.

  2. 2

    If 'Heating Only Operation' is active, Cooling Test Mode cannot be used.

  3. 3

    Deactivate 'Heating Only Operation' to enable Cooling Test Mode.

  4. 4

    Refer to page 86 for instructions on activating/deactivating 'Heating Only Operation'.

Browse all codes in this manual (42)
Verified technical data. Last updated: April 2026

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Source: Panasonic CS-Z
Open Manual (Page 86)Search more codes in this manual