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e-STUDIO2006/2306/2506/2007/2307/2507/2303A/2303AM/2803AM/2309A/2809A
ERROR CODE AND TROUBLESHOOTING
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8.3.15
Communication related service call
[F070] Communication error between system CPU and main CPU
8.3.16
Other service call
[F901] Engine speed error <20L/23L/25L/20H/23H/25H>
Classification
Error content
Communication related service
call
Communication error between system CPU and main CPU
Check item
Measure
Check ROM version
Check the firmware version and confirm if the combination of the
system firmware and engine firmware is correct.
If the version number is not displayed, upgrade the engine firmware
data.
MAIN board
Board check (Check if there is any abnormality in the appearance of
parts mounted on the MAIN board)
Harness
When the ADU is installed, check the following items.
(ADU: Option for 20L/23L/25L/20H/23H/25H, 23LA/23LM/28LM)
1. Check if the harness is caught or open circuited.
2. Check the connectors and harnesses between the ADU
sensor(S8) and MAIN board (CN11).
Parts to be replaced
Remark
MAIN board
Harness
Classification
Error content
Other service call
The speed information of the MAIN board is damaged.
The MAIN board in which is not corresponding to the equipment
model is installed.
Check item
Measure
Harness
Check if there is no problem in the harness for connecting to the
following connector.
MAIN board: CN15
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