Operating Logic Test (Manual Only)

Inspect the PTC operation by confirmation logic as follows;

1. Entering
   1. Set the Floor mode and maximum heating position.
   2. Turn off the blower switch.
   3. Press the intake (recirculation) button 5 times or more.
   4. Indicators of intake and A/C button are continuously flashed with an interval of 0.5 seconds.
   5. Confirm the PTC operation by turn on the blower switch.
   6. Each PTC relay is operated with an interval of 3 seconds.
   7. The logic test will be automatically cancelled after 30 seconds.

      In addition, it can be cancelled by followings;

      • Select A/C or intake (recirculation) switch
      • Ignition switch OFF
2. Cancellation
   • Select A/C or intake (recirculation) switch.
   • Turn the ignition switch OFF.
   • The test is cancelled automatically after 30 seconds.
3. If the PTC is not operated, substitute with a known-good PTC heater and check for proper operation.

   If the problem is corrected, replace the PTC Heater.