Trouble Shooting With Error Code (Indoor Unit); Model Information Error (Indoor Unit Main Pcb Error) - Fujitsu Airstage J-II Service Manual

4-3 TROUBLE SHOOTING

4-3-1 Trouble shooting with error code (INDOOR UNIT)

Trouble shooting 1
INDOOR UNIT Error Method:
Model Information Error
(Indoor Unit Main PCB Error)
Detective Actuators:
Indoor Unit Controller PCB Circuit
Forecast of Cause : 1. Outside cause 2. Connection failure of electric components 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
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:
Outdoor Unit : E.5 U.1
Indoor Unit : Operation LED 3 times Flash, Timer LED 2 Times Flash,
Filter LED Continuous Flash.
Error Code : 3 2
Detective details:
3 continuous failure of read test of EEPROM at Power ON, or Apparent Model
information error from EEPROM. Also, Error on Model information upon model
information test of EEPROM, or Model information of EEPROM not possible to
recover.
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
04-11
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.
Note : EEPROM
EEPROM(Electronically Erasable and
Programmable Read Only Memory) is a non-
volatile memory which keeps memorized
information even if power is turned off. It can
change the contents electronically.
To change the contents, it uses higher
voltage than normal, and it can not change a
partial contents. (Rewriting shall be done
upon erasing the all contents.)
There is a limit in a number of rewriting.