Troubleshooting Reference
Manual # 42-02-1P28 A3 5-55
CTLA DPMR RED. FAULT (424) Description: Rear door input, relay, or associated circuitry failure
detected. Valid when SAF is on. DLK and DPMR must always be in the same
state. If your door operator connects to a UIO board on the car top (rather
than up the traveler to the controller), check that the “spare” inputs used
for door operation are correctly configured. Verify communication to the
UIO board associated with the door spare inputs.
Troubleshooting:
1. Check that DPMR makes (120VAC) 1 to 2 inches prior to door lock.
2. If so, check associated circuitry.
CTLA DRIVE FAULT (376)
CTLB DRIVE FAULT (451)
Description: This fault indicates that the drive has detected a DFLT output
The car will perform an emergency stop with the motor contactor and brake
contactor immediately dropped.
Troubleshooting:
Verify the detected message via drive parameter LF.98. The last ten faults
are saved at 0.LF.98 through 9.LF.98. Refer to Error Messages and Their
Causes in the TorqMax manual.
CTLA DRIVE ON FAULT (377)
CTLB DRIVE ON FAULT (452)
Description: The drive failed to activate the DRO signal when it was sent
the command to run. The car will perform an emergency stop with the
motor contactor and brake contactor immediately dropped.
Troubleshooting:
1. Check for fault messages on the F5 drive display and refer to Error Mes-
sages and Their Causes in the TORQMAX manual for suggested solutions.
2. Check the state of the F5 drive inputs by displaying diagnostic parameter
LF.82. Refer to the LF.82 input state table in the TORQMAX F5 drive manual.
3. Check for proper operation of the PM contactor main contacts.
4. Verify that Brake Pick Delay is set correctly to allow the motor to build up
torque.
5. Verify that F5 drive parameter LF.70 = 0.3.
6. Referring to the job prints, verify terminal X2A.24, X2A.26, X2A.27, and
X2A.29 on the drive. With the drive generating a DRO signal, terminal
X2A.27 should be at the same potential as terminal X2A.26.
Additional Troubleshooting:
1. On M4000 controllers with Rev 8 software, verify F7 parameter 184 for
proper drive type.
2. Verify LF.83 to see if the drive is getting the correct inputs
3. Verify LF.82 to see if the drive is turning on the relay
4. Verify RU.82 to see if the drive is putting out magnetizing current
5. Verify LF.93 to see if the drive is applying phase current
6. Try changing US.25 from 3 to 0 to ignore checks and see what check is
preventing the drive from being ready.
7. Before swapping the drive, try swapping the operator.
CTLA DZF RELAY DISCR (421)
CTLA DZR RELAY DISCR (422)
Description: This fault indicates that the DZF/DZR HC-CTL-2 door zone
input and the associated learn door zone position do not match. The eleva-
tor will stop at the next floor in the direction of travel and shut down until
the fault is cleared by pressing the fault reset button on the HC-CTL-2
board.
Troubleshooting:
1. Verify the voltage at the DZF/DZR terminals on the HC-CTL-2 board,
voltage would indicate the presence of a door zone magnet.
2. Verify door zone magnet placement when using the LS-EDGE landing
system.
3. Re-learn the hoistway through the UTILS->LANDING SYSTEM UTILITIES-
>HOISTWAY LEARN screen.
Table 5.10 Touch Screen Event Listings
Event Description
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