Siemens SENTRON - Service and Maintenance; Fault Rectification

Manual, 08/2017, L1V30368969104A-02
177
Service and maintenance
10
10.1
Fault rectification
The following content is described in this chapter:
● Fault states and fault detection on the 3KC4 transfer switching equipment
● Fault states and fault detection on the 3KC8 transfer switching equipment
10.1.1
Fault states and fault detection on the 3KC4 transfer switching equipment
Fault state
Procedure for fault rectification
The transfer switching equipment does not transfer automat-
ically.
• Check whether the power supply inputs of terminals 301
and 302 (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 contacts 312 and 317 are closed.
• Check whether the "Power" LED shows a green light
and the warning LED has gone out.
• Check product availability via the closed contacts 63A
and 64A.
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.