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•  Error Detection Control 
When e-ion indicator blink, it indicates error listed below: 
o  Active e-ion Air Purifying system PCB main connector open: 
 Judgment Method 
•  During e-ion operation (include during Patrol operation), Active e-ion Air Purifying system main 
connector to PCB is opened. 
 
 Troubleshooting Methods 
•  Connect the connector or stop operation (include during Patrol operation) to cancel the blinking. 
 
o  Abnormal Discharge error: 
 Judgment Method 
•  During e-ion operation, feedback voltage is-Lo (at microcontroller) is detected, it is judged abnormal 
discharge and stops power supplies to the Active e-ion Air Purifying system. 
•  Abnormal discharge is caused by ionizer or filter’s high voltage power supply short-circuits due to 
water or dust adhesion, and so forth. 
•  When abnormal discharge occurred, every 30 minutes the unit supplies power to the Active e-ion Air 
Purifying system. 
•  When abnormal discharge occurs for 24 times continuously, e-ion indicator blinks (not applicable for 
e-ion Check Mode, where the error will shows immediately despite the 24 times counter) 
 
 Troubleshooting Method 
•  Press “PATROL/e-ion” button or “OFF/ON” button to stop the operation and check the Active e-ion 
Air Purifying system main connector to PCB. 
•  After that, press “e-ion” button again to confirm the e-ion indicator not blinking. 
•  The 24 times counter will be clear after 10 minutes of normal operation or when operation stops. 
 
 Error Reset Method 
•  Press “OFF/ON” button to OFF the operation. 
•  Press AUTO OFF/ON button at indoor unit to OFF the operation. 
•  OFF Timer activates 
•  Power supply reset  
 
o  Active e-ion Air Purifying system breakdown error: 
 Judgment Method 
•  When hi-feedback voltage (at microcontroller) supplied to filter during e-ion stop, Active e-ion Air 
Purifying system breakdown error shows immediately. 
•  It is due to indoor PCB or filter’s high voltage power supply damage. 
•  Operations except e-ion continue. Both Timer indicator and e-ion indicator blink. 
 
 Troubleshooting Method 
•  Press “PATROL/e-ion” button or “OFF/ON” button to stop the operation. 
•  Change main circuit board or filter’s high voltage power supply. 
•  When lo-feedback voltage supplied to Active e-ion Air Purifying system during e-ion operation, e-ion 
indicator and Timer indicator stop blinking.