Troubleshooting Without An Error Code, Example; Troubleshooting With Error Code, Example - Kalmar DRF420-60S5 Maintenance Manual

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Troubleshooting without an error
code, example
1 Choose suitable section 0–12 to find the function and sub-func-
2 Read function description for the function in question to get an
3 Use the function description and check the signals for the func-
4 The fault is probably between the two units where the signal is
5 If the component that is to send the signal seems to be correct,
6 If the leads or hoses between the components seem in order,
Troubleshooting with error code,
example
Error codes are strong indicators of malfunctions detected by the
control system. Many error codes are connected to electrical mal-
functions but there are also error codes that interpret associations
between one or several signals that indicate a non-electrical mal-
function. It's important to not draw conclusions too fast based on an
error code.
1 Read out error code from the display, e.g., error code 34.
2 Use the error code lists and search information about the error
3 Follow instructions in field "Action".
4 Use diagnostic menus and circuit diagrams to determine if the
Maintenance manual DRF 400–450
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tion that have caused the symptom.
overall understanding of which components are affected and
how these interact
tion in question to find where in the function chain that signal
or reaction is incorrect.
failing. Start by checking the component that should send the
signal.
check transmission of the signal (electric wiring or hydraulic
hoses).
For electric cabling, see Troubleshooting cable harness page 7.
For hydraulic hoses, see Troubleshooting hydraulic hoses page
8.
then check the component that receives the signal.
code, see "Example of error code information in error code list"
below.
Error code lists are found in section D Error codes.
For detailed instruction on reading out error code, see section
D Error codes.
input signal to the control unit is correct, see section 8 Control
system, group 8.4 Diagnostics as well as section E Schematics.
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