Kalmar DRF420-60S5, Maintenance Manual

Page: 55 / 600

UDRF01.04GB
Maintenance manual DRF 400–450
0 Complete machine – Complete machine 5
page –
Troubleshooting without an error
code, example
1 Choose suitable section 0–12 to find the function and sub-func-
tion that have caused the symptom.
2 Read function description for the function in question to get an
overall understanding of which components are affected and
how these interact
3 Use the function description and check the signals for the func-
tion in question to find where in the function chain that signal
or reaction is incorrect.
4 The fault is probably between the two units where the signal is
failing. Start by checking the component that should send the
signal.
5 If the component that is to send the signal seems to be correct,
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 .
6 If the leads or hoses between the components seem in order,
then check the component that receives the signal.
page –
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
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 .
3 Follow instructions in field “Action”.
4 Use diagnostic menus and circuit diagrams to determine if the
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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