Indoor Eeprom Abnormal (Model No.) - Fujitsu AB*A30LBT Service Instruction

Trouble shooting 10
INDOOR UNIT Error Method:
Indoor EEPROM abnormal
(Model No.)
Detective Actuators:
Indoor Unit Controller PCB circuit
Forecast of Cause:
1. External cause
Check Point 1-1 : Reset Power Supply and operate
Does Error indication show again?
YES YES
Check Point 2 :
Check Indoor Unit electric components
Check all connectors.
(loose connector or incorrect wiring)
Check any shortage or corrosion on PCB.
Check Point 3 : Replace Controller PCB
Change Controller PCB.
Indicate or Display:
Indoor Unit : Operation LED: Blink, Timer LED: Blink,
Outdoor Unit
ERROR CODE : E : 11
Detective details:
When the model information being read from EEPROM has
an apparent error.
2. Defective connection of electric components
Filter LED : Blink
: No indication
3. Controller PCB failure
NO
Check Point 1-2 :
Check external cause at Indoor and Outdoor
(Voltage drop or Noise)
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
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.
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.
07-14
or leak current in the power supply
circuit.