Fujitsu ASU18RLF Service Instructions Manual page 50

Trouble shooting 6
INDOOR UNIT Error Method:
Indoor Unit Model Information Error
EEPROM Access Abnormal
Detective Actuators:
Indoor unit controller PCB
Forecast of Cause:
1. External cause
Test 1-1 : Reset Power Supply and operate
Does Error indication show again?
YES YES
Test 2 : Check Indoor unit electric components
Check all connectors.
(loose connector or incorrect wiring)
Check any shortage or corrosion on PCB.
Test 3 : Replace Controller PCB
Change Controller PCB.
Indicate of Display:
Indoor Unit
Operation lamp : 3 time Flash
Timer lamp
ERROR CODE : [E : 32]
Detective details:
When power is on and there is some below case.
When model information of EEPROM is oncorrect.
When the access to EEPROM failed.
2. Defective connection of electric components
NO
02-10
Outdoor Unit
A
: 2 time Flash
5
: Light ON
3. Controller PCB failure
Test 1-2 : Check external cause such as noise
Check if the ground connection is proper.
Check if there is any equipment that causes harmonic wave
near the power cable (Neon light bulb or any electronic
equipment which causes harmonic wave).
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.
Monitor
B C D E F
15
: Light OFF n : n time blinking