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01-6
3. TROUBLESHOOTING
1) Overview
The FATC has a self-diagnosis function that can diagnose the system by itself. Before checking a
component, be sure to check the fault code by using the self-diagnosis
diagnosis consists of 6 steps. The temperature control dial (step 2 to 5) and fan speed dial (step
6) are used to enter each step of the self-diagnosis. The 6 steps of the self-diagnosis are:
▶ Step 1
- The VFD and all LED segments are checked for proper illumination.
▶ Step 2
- The sensors and air mix door are checked for proper operation.
▶ Step 3
- The position and condition of the air source door and mode door are checked.
▶ Step 4
-
The actuator door position, fan speed and compressor operation are checked. Pressing
the defroster switch after entering step 4 changes the diagnosis mode as follows: 41 -> 42
-> 43 -> 44 -> 45 -> 46 -> 41.
function. The self-
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Table of Contents
Troubleshooting
