Fujitsu Airstage V series - Troubleshooting 3 - Indoor Unit Error Method: EEPROM Access Abnormal

Trouble shooting 3
INDOOR UNIT Error Method:
EEPROM Access Abnormal
Indicate or Display:
Indoor Unit : Operation LED Flash, Timer LED 4 Times Blink
Swing LED 1 Time Blink
Outdoor Unit : LED1 Flash, LED6 1Time Blink
ERROR CODE : E: 06
Detective Actuators:
Indoor Unit Controller PCB Circuit
Detective details:
When 3 continuous failure occurred on lead test of EEPROM.
Forecast of Cause : 1. Outside cause 2. Defective connection of electric component 3. Controller PCB defective
Check Point 1-2 :
Check outside cause (Voltage drop or noise, etc.)
Instant drop ----- Check if there is a large load electric apparatus
in the same circuit.
Momentary power failure ----- Check if there is a defective
contact or leak current in the
power supply circuit.
Noise ----- Check if there is any equipment causing harmonic
wave near electric line (Neon bulb or electric
equipment that may cause harmonic wave).
Check the complete insulation of grounding.
Check Point 3 : Replace Controller PCB
Change Controller PCB and set up the original address.
Check Point 1-1 : Reset Power Supply
Check Point 2 :
Check Indoor Unit electric components
YES
NO
Does abnormal LED indication show again?
p Check all connectors (loose connector or incorrect wiring)
p Check any shortage or corrosion on PCB.
OK
06-11