Daikin GYEQ20AN Service Manual page 150

Gas heat pump air conditioner heat recovery r-410a 50 hz
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Flow Charts for Troubleshooting
9
Abnormal EEPROM
Description
Sub-code 0: EEPROM's internal data area is unreadable.
of the failure
EEPROM failure; main circuit board failure
Possible
causes
of the failure
Flow chart
Is EEPROM Installed Correctly?
YES
Change Main Circuit Board.
Use the EEPROM supplied with the new circuit board.
10
Software Version Mismatch
Sub-code 0: Incorrectly updated to a software version for a different model.
Description
Sub-code 2: Incorrectly updated to a software version for a different series.
of the failure
Sub-code 2: PCB is not supported by the software.
Software version for a different model; software version for a different series; EEPROM failure;
Possible
causes
PCB mismatch
of the failure
Flow chart
Are Model And Series Of
Main CPU Correct?
YES
Is Removed
EEPROM Reinstalled To
New Circuit Board?
YES
Is Circuit Board Correct?
YES
Change Circuit Board,
EEPROM, Or
Reconfigure Model.
139
NO
Install EEPROM Correctly.
NO
Check Model
(Using Onboard Checker.)
Reinstall Removed
NO
EEPROM.
NO
Change Circuit Board.
025872-00E
025873-00EN01
SiAUY361411EA
Error
EA
code
Error
EH
code
Troubleshooting

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