MCi iControl User Manual page 347

Table 6.3 iControl Messages
SCR Loop Over Current, SCR LOOP OVER CURRENT
Description: DC loop current has grossly exceeded the reference value.
Car Reaction: Emergency Stop. DC controls only.
Troubleshooting:
1. Verify that the brake is completely lifting.
2. Check that the load in the car is not in excess of full load.
SCR Low Line Caution Activated, SCR Low Line Caution, SCR LOW LINE CAUTION
Description: The iBox has determined that the line voltage to the System 12 Drive is between 80% and 95%
of rated armature voltage. The line voltage test occurs every time the elevator stops. The detected percent-
age is based on the Rated Armature Voltage parameter setting on the iView Drive Configuration screen >
General tab. DC controls only.
Car Reaction: None. Elevator speed is limited to the detected line voltage percentage.
Troubleshooting:
1. Verify that the Rated Armature Voltage parameter value is correct. The RMS value (AC phase measure-
ment on a voltmeter) at TP4 on the System 12 SCR-LGA board reflects the line voltage divided by one
hundred (The RMS values of the line-to-line voltages at the wye and delta connections of the drive or
secondary isolation transformer).
2. Verify the voltage into the primary of the Drive Isolation Transformer is not sagging.
3. Check the drive header rating against the voltage on the isolation transformer secondary.
SCR Low Line Caution Deactivated. See SCR Low Line Caution Activated.
Description: The iBox has determined that the line voltage to the System 12 Drive is above 90% of rated
armature voltage (see SCR Low Line Caution (Activated)). DC controls only.
SCR Low Line Fault, SCR LOW LINE FAULT
Description: Indicates that AC line voltage to the System 12 Drive has dropped below 95% of the SCR-LGA
header value. DC controls only.
Car Reaction: Car will not move.
Troubleshooting:
1. Verify that the Rated Armature Voltage parameter value is correct. The RMS value (AC phase measure-
ment on a voltmeter) at TP4 on the System 12 SCR-LGA board reflects the line voltage divided by one
hundred (The RMS values of the line-to-line voltages at the wye and delta connections of the drive or
secondary isolation transformer).
2. Verify the voltage into the primary of the Drive Isolation Transformer is not sagging.
3. Check the drive header rating against the voltage on the isolation transformer secondary.
SCR Low Line Test Fault
Description: The test to determine the line voltage to the System 12 drive has failed to determine the line
voltage (see SCR Low Line Caution Activated). DC controls only.
Car Reaction: None. Previous line voltage test values are used.
Troubleshooting: Possible internal hardware error on iBox trying to update System 12 drive's MDAC.
SCR Phase Lock Loop Fault, SCR PHASE LCK LP FLT
Description: This fault indicates that the phase lock loop circuit PLL LED is ON in the SCR-LGA and that the
System 12 SCR Drive was unable to lock onto the incoming line frequency. The PLL LED is normally on for a
few seconds during power up. DC controls only.
Car Reaction: Car will not move.
Troubleshooting:
1. Contact MCE technical support.
iControl Messages
iControl Messages
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