Fujitsu ACUH09LUAS1, Service Manual

Page: 60 / 153

2-8. E: 32. Indoor unit main PCB error (Indoor unit)
Indicator
→ired remote
controller
Error code E: 32
Detective actuator Indoor unit main PCB
→hen power is on and there is some below case.
1. →hen model information of EEPROM is incorrect.
2. →hen the access to EEPROM failed.
Forecast of cause
External cause
Defective connection of electric components
Main PCB failure
Check point 1. Reset power supply and operate
Does error indication show again?
If no, go to "Check point 1-2" .
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 main PCB
Change main PCB.
End
Check point 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).
End
NOTE: EEPROM
EEPROM (Electronically Erasable and Programmable Read Only Memory) is a non-volatile
memory which keeps memorized information even if the power is turned off. It can change
the contents electronically. To change the contents, it uses higher voltage than normal, and
it cannot change a partial contents. (Rewriting shall be done upon erasing the all contents.)
There is a limit in a number of rewriting.
2-8. E: 32. Indoor unit main PCB error (Indoor unit)
- (03-12) -
2. Troubleshooting with error code
TR
O
U
B
LESH
O
O
TI
N
G
TR
O
U
B
LESH
O
O
TI
N
G