AR-M550/M620/M700 SELF DIAG MESSAGE AND TROUBLESHOOTING 9 - 37
Main
code
Sub
code
Title
Memory check sum error (PCU)
U2 91 Phenomenon Display Lamp
Message
Details Memory check sum error
(PCU)
When POF data/counter
data sum error is
detected.
Section Engine
Operation
mode
Note
Case 1 Trouble
position/
Cause
EEPROM trouble
Remedy Check that the EEPROM
is properly installed.
In the simulation to
prevent against delete of
the counter data/
adjustment values, write
down the counter/
adjustment values.
Note
Case 2 Trouble
position/
Cause
Control circuit runaway
due to noises
Remedy Use SIM 16 to cancel the
U2 trouble.
Note
Case 3 Trouble
position/
Cause
PCU PWB EEPROM
access circuit trouble
Remedy Replace the PCU PWB.
Note
Main
code
Sub
code
Title
SPF tray lift-up trouble
U5 30 Phenomenon Display Lamp
Message
Details SPF tray lift-up trouble
Lift-up trouble is detected
5 times continuously.
Section Scanner
Operation
mode
Note
Case 1 Trouble
position/
Cause
STUD/STLD trouble
STUD does not turn on
within the specified time.
STLD does not turn off
within the specified time.
Remedy Check the harness and
the connector of the
STUD and STLD.
Lift-up trouble unit check
Note
Main
code
Sub
code
Title SPF tray lift-down trouble
U5 31 Phenomenon Display Lamp
Message
Details SPF tray lift-down trouble
STLD does not turn off
within the specified time.
Section Scanner
Operation
mode
Note
Case 1 Trouble
position/
Cause
STUD/STLD trouble
STUD does not turn on
within the specified time.
STLD does not turn off
within the specified time.
Remedy Check the harness and
the connector of the
STUD and STLD.
Lift-up trouble unit check
Note
Main
code
Sub
code
Title
LCC lift motor trouble
U6 09 Phenomenon Display Lamp
Message
Details LCC lift motor trouble
• The upper limit sensor
does not turn on within
24 sec after the lift
motor is on.
• No rotation sensor
signal is detected for
0.2 sec or longer while
the lift motor is on.
• The upper limit switch
is on while the lift motor
is on.
When the trouble occurs
3 time continuously that
the upper limit sensor
does not turn on.
Section LCC
Operation
mode
Note
Case 1 Trouble
position/
Cause
Sensor trouble
LCC control PWB trouble
Gear breakage
Lift motor trouble
Remedy Use SIM to check the
sensor detection.
Use SIM to check the lift
motor operation.
Use SIM 15 to cancel the
trouble.
Note
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