68 P2077SB/EN 2011-09 77l_Fehlersuche-en.fm, 06.09.2011
Troubleshooting
15
2-0 Temperature in CPS3 is too
high or too low
Temperature is outside of
the -40 °C to +85 °C range
Excessive number of DGD-IS.
Constant overload of the CPS3
➔ Reduce the number of
PDB-CPS…
Ambient temperature
PDB-CPS… > 40 °C
➔ Improve the ambient condi-
tions
PDB-CPS… is exposed to
other heat sources, i.e. sunlight
➔ Improve the ambient condi-
tions, attach covers if nec-
essary
Heat dissipation from the
PDB-CPS… is inadequate due
to external conditions
➔ Ensure that air can circulate
through the cooling fins
Housing openings on the CPS3
are covered
➔ Clear the housing openings
2-1 Switch-on relay contact
does not open
Relay for switch-on current
limitation in the CPS3 is
stuck.
Detection only occurs when
switching on.
The relay contact is closed
during operation
Subsequent error – a different
fault destroyed the relay
➔ Replace the CPS3
Maximum number of switch-on
cycles exceeded
➔ Replace the CPS3
2-2 Intermediate circuit
(380 VDC) discharge not
possible
The intermediate circuit can-
not be discharged
Subsequent error, a different
fault destroyed the relay
Main relay Q4 or Q5 in PM
does not open
➔ Replace the main relay Q4
or Q5
Braking chopper in the CPS3 is
defective
➔ Replace the CPS3
Braking resistor is highly resis-
tive or burnt through
➔ Replace the CPS3
2-3 24V supply
24 V supply is not within the
range 21.5 V - 27.3 V
➔ Measure the voltage at
"XS3", terminals 1 and 6
24 V power adapter in
PDB-CPS… is defective
➔ Replace the power adapter
Power adapter T2 in
PDB-CPS… is overloaded
➔ Check the maximum load (8
A) on the CPS3
Voltage on power adapter in
PDB-CPS… is incorrect
➔ Set the voltage on the
power adapter to 26.0 V
Fuse (thermal) 24 V in the
CPS3 is highly resistive
➔ Switch off the PDB-CPS…
and switch back on again
after a minute.
➔ Check the maximum load –
replace the CPS3
Display
Error
Description
Possible causes Measures and
remedies
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