Siemens SENTRON - Fault States and Fault Detection on the 3 KC8 Transfer Switching Equipment

Service and maintenance
10.1 Fault rectification
Manual, 08/2017, L1V30368969104A-02
179
10.1.2
Fault states and fault detection on the 3KC8 transfer switching equipment
Fault state
Procedure for fault rectification
The transfer switching equipment does not transfer automat-
ically (automatic or remote transfer switching).
• 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.
The transfer switching equipment cannot be operated with
the handle.
• 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.
The electrical commands I (ON) – O (OFF) – II (ON) are not
followed.
• 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.
The transfer switching equipment cannot be locked.
• 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).