Inspect the PTC operation by confirmation logic as below.
1. Entering method
(1) Set the floor mode, maximum heating
(2) Turn off the blower switch
(3) Press the intake button more than 5 times
(4) Indicator of entire button is flashed with an interval of 0.5 seconds continuously (Manual).
Graphics of the entire LCD display switch on and off with an interval of 0.5 seconds continuously (Automatic)
(5) Confirm the PTC operation by operating the blower switch
Manual : 1~8 step, Automatic: 1~8step.
(6) Each PTC relay is operated with an interval of 3 seconds.
(7) Execute the PTC operation by confirmation logic for 30 seconds.
2. Cancellation method.
(1) Select the A/C button or intake button.
(2) IG "OFF".
(3) Cancel the logic after 30 seconds automatically.
3. If the PTC operation is not operated, substitute with a known-good PTC and check for proper operation.
If the problem is corrected, replace the PTC.
