Magnetek 188-10130 - Manual (Page 35)

RVS-DX, Digital Soft Starter Instruction Manual—4/01/04
5-9
Heatsink Over Temperature
The starter has thermal sensors mounted on the heatsink, tripping the starter when the heatsink
temperature rises above 85°C.
Wrong Parameters
This protection indicates when incorrect parameters have been entered into the EEPROM. This can
also occur when parameters have been incorrectly transferred from RAM to EEPROM.
External Fault
The external fault becomes operational when the starter is energized. The starter will trip when the
external (N.O.) contact on terminal C1 closes for more than 2 seconds. (Aux. input C1 must be
programmed to External Fault).
Fault and Reset
When any of the above protections cause the starter to trip, it locks in a fault condition and disables
the SCR firing. The “Fault” LED illuminates, the LCD displays the fault message, and the fault
contact (at terminals 23 & 24) closes.
The fault may be reset:
–via the “Reset” key on the keypad.
–via input at terminal C1.
NOTE: The fault may only be reset once the fault condition has cleared and the run signal is
removed.
NOTE: If fault occurs due to voltage outage, fault condition is latched and reappears upon
voltage restoration.
Fault and Auto Reset
The phase loss and under voltage trips can be auto reset. The auto reset must be enabled. This is
accomplished in the “Fault Parameters” mode. When auto reset is enabled, the faults due to phase
loss and under voltage will receive a reset signal after a delay of 60 seconds. If the fault condition
has cleared and the start signal has been removed, then the fault will be reset.
WA R N I N G
The over temperature protection is designed to operate under normal conditions. The SCRs
could overheat and fail before the heatsink reaches 85°C in the following situations: if the
starter is run at extended low overload, with insufficient ventilation, sized improperly, started
too frequently, or started frequently beyond maximum conditions.