Troubleshooting
6-76 Manual # 42-02-7223
Up Normal Terminal Switch ’n’ Level 2 Speed Fault, UP NTS’n’ L2 SPEED FLT (n = 1 to 5)
Description: A Level 2 Overspeed fault has been detected at Up Normal Terminal switch 'n' (1 to 5). The car
was traveling faster than defined by Level 2 overspeed settings (105% of sum of learned speed plus Over-
speed 1 Margin percentage setting on Configuration > Terminal Switches tab). This fault may be bypassed
on the Diagnostics > Fault Bypass tab.
Car Reaction: Emergency stop: Motor contactor and brake contactor immediately dropped.
Troubleshooting:
1. Check Diagnostics > Terminal Switches Status to see how fast car was traveling on Last pass by switch.
Check this value against Learned speed for switch. If appropriate, increase Overspeed 1 Margin on Con-
figuration > Terminal Switches tab.
2. May be caused by Pattern parameters changes. Always re-learn switches after changes to Pattern.
3. One or two floor runs may be “hotter” than multi-floor runs. (Switches are learned making full hatch
runs.) If short runs are causing this, you may have to increase the Overspeed 1 Margin or lower the
Standard profile - High Roll Jerk parameter.
4. Can also be caused by car following the pattern poorly, possibly due to heavy load or poor speed loop
performance. In this case, you need to get the speed loop adjusted to follow pattern as well as possible
and/or alter the pattern parameters to produce a gentler deceleration and approach to the floor (then re-
learn the switches). Please refer to “Terminal Switch Overspeed and Position Faults” on page 4-57.
Up Normal Terminal Switch ’n’ Position Fault, UP NTS’n’ POSITION FLT (n = 1 to 6)
Description: When switch opened or closed, car reported position different from learned position by value
exceeding margin set on Configuration > Terminal Switches. Switch may have opened early, late or not at all
on approach to terminal. Switch may have closed early, late, or not at all on departure from terminal. Switch
can go open while at a floor where learned position is closed, or go closed at floor where learned position is
open. This fault may be bypassed on the Diagnostics > Fault Bypass tab.
Car Reaction: If traveling up, car executes emergency slowdown, continues at low speed until floor encoun-
ter. Car stops at floor, opens doors, performs floor sync. If fault persists, car goes out of service. If traveling
down, car continues to first stop, opens doors, performs floor sync. If fault persists, car goes out of service.
If stopped at floor, car opens doors, does a floor sync, and, if fault persists, goes out of service.
Troubleshooting:
1. On Diagnostics > Terminal Switches Status, compare Last pass position to Learned position for switch.
2. If mechanical (switch movement/magnet movement, bad traveler), will tend to repeat at same position.
3. A stuck switch is easy to spot by running the car on inspection and observing the input LEDs on the iBox.
4. Perform a Terminal Sync operation (Terminal button on the Configuration > Pattern > Common tab).
User code accessing an invalid logical indicator (internal event)
User Event ‘n’ Off (n = 1- 10) (see User Defined Event ‘n’ On)
User Event ‘n’ On (n = 1 - 10),
Description: Indicates that User Event ‘x’ (1 - 10) has been activated via User Input ‘n’ (1 - 10)
Car Reaction: Determined by user programming (Configuration > Advanced > User Inputs tab)
Troubleshooting: Determined by user programming (Configuration > Advanced > User Inputs tab)
Vector Checksum Fault (see Safety Inventory Checksum Fault)
Vector Comparison Fault (see Safety Inventory Comparison Fault)
Vector Creation Fault (see Safety Inventory Creation Fault)
Vector Learn Fault (see Safety Inventory Learn Fault)
Watchdog Ordered Control Stop Before Reset
Description: A critical component in the system has locked up.
Car Reaction: The car will come to a controlled stop and the system will reboot automatically.
Watchdog Ordered Emergency Stop Before Reset
Description: A critical component in the system has locked up.
Car Reaction: The car will perform an emergency stop and the system will reboot automatically.
Table 6.3 iControl Messages
iControl Messages
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