Troubleshooting 3 - Indoor Unit Error Method: Eeprom Access Abnormal - Fujitsu Airstage V series Service Manual

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