6-69
iControl Messages
iControl AC
6
Safety String Open
Description: Contact in safety circuit is open.
Car Reaction: Emergency stop: Motor contactor and brake contactor immediately dropped.
Troubleshooting:
1. Refer to the job prints. Verify all safety string switches and wiring.
2. Verify power at: SAFC, SAFH, GOV, ESM, and ESC (if car stop switch bypass is off). SAFC and SAFH can
be bypassed by installing Safety Bypass Jumper on IRB board if car must be moved off final limits.
3. If a rope gripper installed and rope gripper option selected, check RGOK is equal to 1.
4. If cartop exit present and cartop exit option selected, check that CTEX input is equal to 1.
5. If Unintended Motion tripped, clear Unintended Motion fault.
6. Clear faults left on iBox display.
7. When problem is fixed, fault will automatically clear after 5 seconds.
Safety String Closed (See: Safety String Open)
SCR AC Phase Fault, SCR AC PHASE FAULT
Description: Indicates the 6 feed wires to M-contactor at bottom of System 12 Drive are incorrectly con-
nected. When incorrectly connected, 30-degree phase angle between X and Y inputs is lost. DC controls only.
Car Reaction: Emergency Stop.
Troubleshooting:
1. Check for defective or disconnected 32-pin ribbon cable between SCR_LGA board and iBox.
2. Check if the SCR Drive Diagnostic indicators WYE PR, DELTA PR, or 30-Degree PR are ON.
SCR Armature Voltage On, SCR ARM VOLTAGE ON
Description: Indicates presence of DC voltage between armature terminals A1 and A2 in excess of 0.7VDC
before RE relay enabled. DC controls only.
Car Reaction: Failure prevents a normal run.
Troubleshooting:
1. Verify test point TP1 on SCR-LGA board (see Section 8) is 0.0mv when no direction is commanded.
Adjust R2 if needed.
2. Check cable between iBox AC/DC Drive jack and SCR drive.
3. Check SCR-LGA board (see Section 8).
SCR Contactor Fuse Fault, SCR CNTACTR FUSE FLT
Description: Indicates semiconductor fuse blown or one or more of 6 contacts within two contactors failed.
DC controls only.
Car Reaction: Emergency Stop.
Troubleshooting:
1. Check secondary wires of drive isolation transformer.
2. Check primary voltage on each of the primary terminals of the drive isolation transformer.
3. Check for harsh motor control, vibration, or humming.
4. Check for motor mechanical defect such as interpole (partially shorted).
5. Oscilloscope to 2msec/div, 500mv/div, AC coupling. Verify 12 drive pulses equal amplitudes and periods.
6. Check M1 and M2 contacts.
7. Check semiconductor fuses. (See Section 8.)
SCR Drive Ready Fault, SCR DRIVE READY FAULT
Description: Ready signal from System 12 SCR Drive is inactive. Signal is inactive when System 12 Drive
detects fault or is being reset (about 5 seconds). DC controls only.
Car Reaction: The elevator is prevented from moving while this signal is inactive.
Troubleshooting: Check Event Calendar, Hoistway display or iBox display for active SCR drive faults and fol-
low the recommended troubleshooting for those faults.
Table 6.3 iControl Messages
iControl Messages
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