Siemens Energy & Automation, Inc.
35
Table 7
- LED Fault Indications
Indication
Cause
Check/Remedy
LED 1 single flashing
Phase loss
Verify that proper three-phase incoming power is present per
paragraph 6.5, steps 3 and 4.
Inside Delta wiring problem
See problem 2 in Table 9.
LED 1 double flashing
EEPROM error
Replace the logic board. Replacement instructions are included
with the new logic board. Return the faulty logic board to the
factory.
LED 2 double flashing
Shorted SCR
Check SCR’s as described in paragraph 9.4.
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9.1 Maintenance and Troubleshooting
Step 1. Regularly check (the frequency depends upon the
amount of airborne particulate matter) the fans and heatsink fins
for unimpeded air flow and check that the fans are moving
freely.
Step 2. The following NEMA standards should be used as the
basis of a preventive maintenance program:
ICS 1.1-1984 (R1988) "Safety Guidelines for the Application,
Installation, and Maintenance of Solid State Control"
ICS 1.3-1986 (R1991) "Preventive Maintenance of Industrial
Control and Systems Equipment."
Step 3. If the torque requirements for wiring connections are
not legible, refer to UL 486E "Equipment Wiring Terminals for
use with Aluminum and/or Copper Conductors.” for nominal
torque values.
Step 4. In the circumstance of a fault condition as indicated by
the opening of a short circuit protective device, refer to Annex A
("Maintenance of Motor Controllers After a Fault Condition") of
NEMA standard ICS 2-1993 "Industrial Control and Systems,
Controllers, Contactors, and Overload Relays Rated Not More
Than 2000 Volts AC or 750 Volts DC."
This checklist does not represent an exhaustive survey of main-
tenance steps necessary to ensure safe operation of the equip-
ment. Particular applications may require further procedures.
Should further information be desired or should particular prob-
lems arise which are not covered sufficiently for the purchaser's
purposes, the matter should be referred to the local Siemens
sales office.
Dangerous voltages are present in the equipment which can
cause death, serious injury, or property damage. Always deen-
ergize and ground the equipment before maintenance.
Maintenance should be performed only by qualified personnel.
The use of unauthorized parts in the repair of the equipment or
tampering by unqualified personnel will result in dangerous con-
ditions which can cause death, serious injury, or equipment
damage. Follow all safety instructions contained herein.
9.2 Troubleshooting Tables
Two LED indicators on the SIKOSTART controller provide fault
indications as listed in Table 7 which includes recommended
checks and remedies.
Table 8 is a general troubleshooting table listing troubles, their
possible causes, and recommended checks and remedies.
Inside Delta wiring problems are described in Table 9.
Voltage or fire hazard.
Can cause death, serious injury, or
property damage.
Failure to properly maintain this equipment
can result in death, serious injury, property
damage or product failure. The instructions
referred to below should be carefully
reviewed, understood and followed regularly.
