Fault States And Fault Detection On The 3Kc8 Transfer Switching Equipment - Siemens SENTRON Manual

10.1.2

Fault states and fault detection on the 3KC8 transfer switching equipment

Fault state
The transfer switching equipment does not transfer automat-
ically (automatic or remote transfer switching).
The transfer switching equipment cannot be operated with
the handle.
The electrical commands I (ON) – O (OFF) – II (ON) are not
followed.
The transfer switching equipment cannot be locked.
Manual, 08/2017, L1V30368969104A-02
Procedure for fault rectification
Check whether the power supply inputs of terminals 101
•
and 102 as well as 201 and 202 (208 to
277 V AC ± 20 %) are connected.
Check whether the switch is in the "Auto" position.
•
Check whether contacts 313 and 317 are opened.
•
Check whether the "Power" LED shows a green light
•
and the warning LED has gone out.
Check whether the "Ready" LED on the electronic mod-
•
ule shows a continuous green light
Check whether at least one of the two LEDs for source
•
availability shows a continuous green light.
Check product availability via the closed contacts 63A
•
and 64A as well as 63B and 64B.
Check whether the problem relates to the electronic
•
module and the motor operator, or only to the electronic
module.
Note: The electronic module can be bypassed to localize the
problem to the electronic module or motor opera-
tor. Contacts 312 and 317 must be closed and contact 313
must remain open.
In this way, the motor operator can execute transfer com-
mands through inputs 314-317 without involvement of the
electronic module. The transfer switching equipment is in
remote mode.
Check whether the switch is in the "Manual" position.
•
Check whether the product is not padlocked.
•
Check the direction of movement of the handle.
•
Try to turn the handle in the direction described on the
•
handle with appropriate force.
Check the selected control logic (impulse / continuous
•
operation logic).
Check the cabling of the plug-in connections.
•
Check whether contacts 312 and 317 are closed.
•
Check whether contacts 313 and 317 are opened.
•
Check whether the switch is in the "Manual" position.
•
Ensure the handle for manual transfer has been re-
•
moved and is not secured in the assembly.
Check whether the switch on the transfer switching
•
equipment is in the O position (padlocking mode is only
possible in the O position).
Service and maintenance
10.1 Fault rectification
179