5815.3. Breakdown Self Diagnosis Function15.3.1. Self Diagnosis Function (Three Digits Alphanumeric Code)• Once abnormality has occurred during operation, the unit will stop its operation, and OFF/ON operation LED OFF.• OFF indicator does not shown on remote control display.• In operation after breakdown repair, the last error code abnormality will be stored in EEPROM.• To make a diagnosis1. OFF/ON operation LED OFF and the unit automatically stops the operation, but the OFF indicator does not shown.2. Press CHECK button continuously for 5 seconds.3. “- -” will be displayed on the remote controller display.4. Press timer or button on the remote control. The error code “H00” (no abnormality) will be displayed.5. Every press of the button ( or ) will increase the error code number.6. When the displayed error code matches the unit's error code, OFF/ON operation LED will be ONcontinuously.7. The breakdown diagnosis mode will be cancelled by pressing CHECK button continuously for 5 seconds or wait for 30seconds.• AC Reset buttonWhen AC Reset button is pressed, the error code will bereset so that the unit will be able to operate and recheck ifany error occurred.• To display memorized error status:1. Turn ON the power supply.2. Press CHECK button continuously for 5 seconds.3. “- -” will be displayed on the remote controller display.4. Press timer or button on the remote control. The error code "H00" (no abnormality) will be displayed.5. Every press of the button ( or ) will increase the error code number.6. When the displayed error code matches the unit's error code, OFF/ON operation LED will be ONcontinuously.7. The breakdown diagnosis mode will be cancelled by pressing CHECK button continuously for 5 seconds or wait for 30seconds.