Troubleshooting
6-52 Manual # 42-02-7223
LCD Fault
Description: Generated if controller gets a “not ready” state from LCD. This can happen if iBox LCD is not
connected properly or, with some LCD models, if contrast is set to far to an extreme.
Car Reaction: None. The fault is simply an indication to adjust or replace the iBox LCD.
Troubleshooting:
1. Check the iBox Onboard Display LCD. If the LCD is blank or frozen, adjust the contrast dial to midpoint.
2. If the display looks corrupted, press the iBox Computer Reset button.
Learn Switch Timed Out Fault, LEARN SW TIMED OUT
Description: When the Learn Switch is ON for more than 15 minutes, the car will shut down.
Car Reaction: The car is not allowed to restart after the current run is completed.
Troubleshooting:
1. Turn OFF the iBox Learn switch.
2. If more time is needed in Learn mode, turn the Learn switch back ON to reset the fifteen minute timer.
Learn U/DNT1-5 and U/DETS Positions, LEARN U/DTS POSITIONS
Description: The positions for the normal and emergency terminal limit switches have not been learned.
Car Reaction: The elevator can only be run on Inspection or Test modes.
Troubleshooting: Perform the normal and emergency terminal limit switches learn operation (Learn tab on
the iView Terminal Switches Configuration screen)
Learn U/DNT1-5 and U/DETS Speeds, LEARN U/DTS SPEEDS
Description: The speeds for the normal and emergency terminal limit switches have not been learned.
Car Reaction: The elevator can only be run on Inspection or Test modes.
Troubleshooting: Perform normal and emergency terminal limit switches learn operation (Learn tab on the
iView Terminal Switches Configuration screen)
Learning empty load values, LEARNING EMPTY LOAD
Description: Empty car load learn calibration has been initiated.
Car Reaction: Car will start load learn process.
Learning full load values, LEARNING FULL LOAD
Description: Full car load learn calibration has been initiated.
Car Reaction: Car will start load learn process.
Light Load Anti-nuisance
Description: Light load anti-nuisance operation. Load in car is less than programmed Light Load Threshold.
Car Reaction: An anti-nuisance feature (if enabled) will limit number of car calls registered. Should number
of registered car calls exceed programmed limit, all car calls will be canceled.
Troubleshooting:
1. If displayed in error, verify programmed “Light Load Threshold” value. (Adjust if needed on the Load
Weigher Configuration screen.)
2. Verify user-defined number of car calls allowed if car load less than Light Load Threshold. Please refer to
“Car Operation - Passenger Tab” on page 9-41.
3. Evaluate whether or not the load in the car is less than the Light Load Threshold value. Calibrate the load
weigher if necessary.
4. For discrete input load weighers, check the Light Load input shown on the job prints.
Limit Switches Checksum Fault, LIMIT SW CHKSUM FAULT
Description: Learned ETS and NTS limit switch speed values have Invalid Checksum in nonvolatile memory.
An invalid checksum means that the data stored may not be reliable.
Car Reaction: Emergency stop: Motor contactor and brake contactor immediately dropped.
Troubleshooting:
1. Relearn Hoistway limit switches. Use the Default option on the Terminal Switch learning screen.
Table 6.3 iControl Messages
iControl Messages
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