Fujitsu Airstage UTP-RU01AH, Service Manual, Page: 111 / 246

Trouble shooting 18 E32. 1
INDOOR UNIT Error Method:
Indoor unit PCB Model Information
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:
3 continuous failure of lead 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.
Forecast of Cause : 1. Outside cause 2. Connection failure of electric components 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
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.
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