Error Error message text Cause Remedy
34 The correction vari‐
able is faulty.
One or more correction
variables have been
incorrectly entered
and/or the correction
variable has been
incorrectly recorded.
Check the correction variable and all
connected components.
85 The external power
supply is faulty.
The external power
supply has been incor‐
rectly designed or is
faulty.
Return the external power supply to its
correct working order.
86 The communication
is faulty.
87 The connection to
the communication
module is faulty.
The connection ele‐
ments have been incor‐
rectly installed or are
faulty.
Return the controller to the factory for
inspection.
88 The connection to
the extension unit is
faulty.
The connection cable
has slipped out of the
socket.
Check the connection cable and
tighten.
Connection problems
between the main and
extension unit.
Return the controller to the factory for
inspection.
99 A system error
exists.
System components
have failed.
Return the controller to the manufac‐
turer for inspection.
[Diagnostics]
171
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