Fujitsu AUXB04GALH Service Manual page 93

Trouble shooting 15
INDOOR UNIT Error Method:
Indoor unit EEPROM Access Error
Detective Actuators:
Indoor Unit Controller PCB Circuit
Forecast of Cause :
1. Outside cause 2. Defective connection of electric component
Check Point 1-1 : Reset Power Supply
Does abnormal LED indication show again?
YES
Check Point 2 :
Check Indoor Unit electric components
Check all connectors (loose connector or incorrect wiring)
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:
E32. 3
Outdoor Unit : E.5 U.1
Indoor Unit
Error Code
Detective details:
When 3 continuous failure occurred on lead test of EEPROM.
NO
04-23
: Operation LED 3 times Flash, Timer LED 2 Times Flash,
Filter LED Continuous Flash.
: 3 2
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
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.
contact or leak current in the
power supply circuit.