Saf OPAL Pro MS6 User Manual download pdf (Page 20)

MS6 REDUCED VOLTAGE STARTER

Page 19

6 FAULTS

Fault (display) Description

IOC Instantaneous Over Current

- Current has reached a value of 1000% of stack size

- Usually a short circuit on the output or misfiring of SCR’s

- This fault cannot be disabled

MTR OVRLD Motor Thermal Overload (calculated)

- motor has been drawing over 100% of motor nameplate current

for a specified amount of time based on the class of overload

selected in group 15 parameter 2

- after this fault has occurred the Opal Pro will not allow a reset

for approx. 6 minutes (this is to allow the motor to cool down)

- this fault can be disabled in group 15 parameter 2

PHASE LOSS Incoming Phase Loss

- one of the incoming phases is missing or abnormally low

- phase voltages can be read in group 1 parameters 2, 3, and 4

- this fault will not be triggered until the motor is commanded to

start

- this fault cannot be disabled

SHEAR PIN Excessive Motor Current While Running

- if the Opal Pro is phased fully on and the motor is up to speed

this fault will be triggered if the current goes above 300%

- this fault can be disabled in group 15 parameter 1

SHORTED SCR Shorted SCR Fault

- this fault will not be triggered until the motor is commanded to

start

- this fault cannot be disabled

HEAT SINK OT Heat Sink Over Temperature

- One of three temperature switches mounted on the heat sink has

been triggered

- These switches trigger at approx. 85 degrees Celsius

- The switches are only mounted on units which include fans

- This fault cannot be disabled

COMM FLT Communication Fault

- a loss of communication between the Opal Pro and the master

device has been detected based on a watch dog bit that is sent

back an forth

- this fault is disabled when no communication cards are installed

on the Opal Pro

- this fault can also be disabled in group 15 parameter 3

- the time delay for the watch dog bit can be set in group 15

parameter 4

POWERING UP Power Up Sequence

- the Opal Pro will be faulted for the first 6 seconds after the

120VAC control power is applied

- this allows time for everything to initialize and then a fault reset

is automatically applied at the end of the 6 seconds

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Saf OPAL Pro MS6 User Manual Page 20

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