Selecting The Diagnostic Modes - jcb JS300 Service Manual

1 Start the engine and enable the hydraulic controls. If
necessary operate the machine until the hydraulic oil
temperature is between 50 ºC and 85 ºC.
The test run mode will not enable unless the hydraulic
oil temperature is within the correct range, and the
hydraulic controls are enabled.
2 Use the controls on the DECU 4 to select the machine
status home screen. Refer to Section 2, Operation.
1
4
Fig 1.
3 Press and hold the buttons 1 and 2 at the same time
for a period of five seconds. The diagnostic mode
screen is displayed.
Fig 2. Diagnostic mode screen
1 Test run mode symbol
2 Pressure switch status mode symbol
3 Fan test mode symbol
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Selecting the Diagnostic Modes

2
3
C130420
1
2
3
C131030
9813/5100-1
Section C - Electrics
Machine Diagnostic Modes
Selecting the Diagnostic Modes
4 Turn the select rotary control 3 until the display
highlights the required mode symbol.
5 Press the select rotary control to select the required
mode.
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