Troubleshooting
6-24 Manual # 42-02-7223
Door Lock Clipped Greater than 200fpm, DOOR LK CLIPPED G200
Description: The door lock signal (DLAT, DLMS, DLAB, or GS) went low for over 300mS while the car was
moving at over 200 fpm.
Car Reaction: Emergency stop: Motor contactor and brake contactor immediately dropped.
Troubleshooting:
1. Use the Event Log to determine where the fault occurred. Examine the locks in that area of the hoistway
first.
2. Usually caused by a misadjusted door, where the pickup rollers do not have adequate running clearance
from the door clutch.
3. Because this fault must persist for over 300mS, a slight “bumping” of the door lock will not set it off. If
the door clutch/pickup roller clearance is adequate, make sure the door contacts are clean and the door
lock mechanism drops cleanly without friction or binding.
Door Lock Clipped Less than 200fpm, DOOR LK CLIPPED L200
Description: The door lock signal (DLAT, DLMS, DLAB, or GS) went low while the car was moving at under
200 fpm.
Car Reaction: ASAP stop.
Troubleshooting:
1. Usually caused by a misadjusted or damaged door. Because it only occurs at speeds under 200 fpm, it is
usually seen when the car leaves the floor where the problem door is located.
DOOR LOCK OPENED
Description: This is a status message indicating that the safety processor has detected that the door lock is
open. A fault is generated if the car is moving or attempts to move while the door lock is open.
Down Direction Limit Open, DOWN DIR LIMIT OPEN
Description: Down normal terminal direction limit switch is open.
Car Reaction: Initiate an immediate stop if moving. Further down direction movement is prevented.
Troubleshooting:
1. Verify that the switch is operating properly.
2. Verify correct state of the iBox DNTD input.
3. Verify that DNTD switch is activating/deactivating at the appropriate location (normally 2” below the bot-
tom terminal landing - see prints).
Down Emergency Terminal Switch Position Fault, DN ETS POSITION FAULT
Description: The reported position upon encountering the Terminal Switch differed from the learned switch
position by more than the set position margin. This fault may be bypassed on the Diagnostics > Fault Bypass
tab.
Car Reaction: Emergency Stop: Motor contactor and brake contactor immediately dropped. All hall and car
calls are cancelled. After the car is stopped, it will run at Correction speed to the next available floor and
cycle the door. Door Open button will remain operational. If fault generated when car is moving, fault will
stay latched and the Fault Reset button must be pushed to clear it. If generated when the car is not moving,
fault will self clear when condition no longer exists.
Troubleshooting:
1. Physically check the integrity of the switch and wiring.
2. Check the iBox input for the switch.
3. On the Diagnostics > Terminal Switches Status tab, compare the last pass position against the learned
position for this switch. Verify that Position Margin is within a reasonable range. Relearn the NTS and ETS
switches. Please refer to “Learning Normal & Emergency Terminal Limit Switches” on page 4-13.
Table 6.3 iControl Messages
iControl Messages
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