Fujitsu Airstage J-II, Service Manual

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Trouble shooting 3
INDOOR UNIT Error Method:
EEPROM Access Abnormal
(Indoor Unit Main PCB Error)
Indicate or Display:
Indoor Unit : Operation LED 3 times Flash, Timer LED 2 Times Flash,
Filter LED Continuous Flash.
Outdoor Unit : E.5 U.1
Error Code : 3 2
Detective Actuators:
Indoor Unit Controller PCB Circuit
Detective details:
When 3 continuous failure occurred on read 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?
Check all connectors (loose connector or incorrect wiring)
Check any shortage or corrosion on PCB.
OK
04-13