iControl Messages
Manual # 42-02-7223 C1 6-73
6
iControl DC
Safety String Open
Description: Contact in safety circuit is open.
Car Reaction: Emergency stop: Motor contactor and brake contactor immediately dropped.
Tro ubleshooting:
1. Refer to the job prints. Verify all safety string switches and wiring.
2. Verify the following have power: SAFC, SAFH, GOV, ESM, and ESC (if the car stop switch bypass is off).
Note that SAFC and SAFH can be bypassed by installing the Safety Bypass Jumper on the IRB board if
the car needs to be moved off the final limits for example).
3. If a rope gripper is installed and the rope gripper option is selected, check RGOK is equal to 1.
4. If a cartop exit is present and the cartop exit option is selected, check that CTEX input is equal to 1.
5. If Unintended Motion was tripped, clear the Unintended Motion fault.
6. Clear any faults left on the iBox display.
7. When the problem is fixed, the fault will automatically clear after 5 seconds.
Safety String Closed (See: Safety String Open)
SCR AC Phase Fault, SCR AC PHASE FAULT
Description: Fault indicates the 6 feed wires to M-contactor at bottom of System 12 Drive incorrectly con-
nected. If so, 30-degree phase angle between X and Y inputs is lost. DC controls only.
Car Reaction: Emergency Stop.
Tro ubleshooting:
1. Check for a 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 a DC voltage between armature terminals A1 and A2 in excess of 0.7VDC
before RE relay is enabled. DC controls only.
Car Reaction: Failure prevents a normal run.
Tro ubleshooting:
1. Verify test point TP1 on SCR-LGA board (See “SCR-LGA Board Layout” on page 6-128.) is 0.0mv when no
direction is commanded. Adjust R2 if needed.
2. Check for defective cable between the iBox AC/DC Drive jack and the SCR drive.
3. Check SCR-LGA board (see Section 6).
SCR Contactor Fuse Fault, SCR CNTACTR FUSE FLT
Description: Indicates that either the semiconductor fuse has blown or one or more of the 6 contacts within
the two contactors has failed. DC controls only.
Car Reaction: Emergency Stop.
Tro ubleshooting:
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. Set an oscilloscope to 2msec/div, 500mv/div, AC coupling. Verify that the 12 drive pulses have equal
amplitudes and periods.
6. Check M1 and M2 contacts.
7. Check semiconductor fuses. (See “Semiconductor Fuses” on page 6-130.)
SCR Drive Ready Fault, SCR DRIVE READY FAULT
Description: Ready signal from the System 12 SCR Drive is inactive. This signal is inactive when the System
12 Drive detects a 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 the Event Calendar, Hoistway display or iBox display for active SCR drive faults and
follow the recommended troubleshooting for those faults.
Table 6.3 iControl Messages
iControl Messages
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