The Computer
5-74 Manual # 42-02-1P28 A3
DVR2 UP TERM LIM FAIL (645)
DVR3 UP TERM LIM FAIL (678)
DVR4 UP TERM LIM FAIL (711)
Description: Both the Up Slow Limit and Up Emergency Limit switches
have been detected to be in opposite states. These switches should open/
close simultaneously, meaning that the voltage at these terminals should
always be identical.
Troubleshooting:
1. Check the connections to terminals USL1 and USL2.
2. Check the limit switches for proper operation.
3. Replace the HC-DVR board.
Additional Troubleshooting:
1. Check the EDGE signals on terminal landings. Bad terminal magnets may
cause this issue.
2. If working with a CTL-2, make sure the F7 parameter 72 is set to 'Virtual'
and not 'Unused' as that may cause this issue.
3. If top landing is a short floor, check parameters 90 and 95 (assuming 72
and 73 are both virtual).
DVR2 YRD INPUT FAILURE (640)
DVR3 YRD INPUT FAILURE (673)
DVR4 YRD INPUT FAILURE (706)
Description: The Y Contactor Redundancy (YRD) input monitors the nor-
mally closed auxiliary contact of the Y starter contactor.
Troubleshooting:
1. The wiring or devices connected to YR1 input may not be terminated.
Check the Y auxiliary contact wired to terminal YR1 and replace if neces-
sary.
2. Check the operation of the Y contactor.
3. Replace the HC-DVR board.
DVR3 DRD FAIL TO ACT (665)
DVR4 DRD FAIL TO ACT (698)
Description: The DRD input that monitors the UP TO SPEED output from
the solid-state starter did not go high when expected.
Troubleshooting:
1. Check the wiring associated with the solid-state starter, especially termi-
nal SSD. This message may also be displayed if the UP TO SPEED timer
duration is shorter than the amount of time it takes to ramp the motor up
to operating speed.
2. If any faults are displayed on the solid-state starter refer to the starter
manual.
3. Replace the HC-DVR board.
DVR3 IS OFFLINE (494) Description: Driver board HC-DVR #3 is offline. See also, DVR 1 IS
OFFLINE and DVR 2 IS OFFLINE - car has three starters.
Troubleshooting:
1. Verify the SW1 settings on HC-DVR board #1: 1 = Off, 2 = Off.
2. Verify the SW1 settings on HC-DVR board #2: 1 = On, 2 = Off.
3. Verify the SW1 settings on HC-DVR board #3: 1 = Off, 2 = On.
4. Verify that the setting for NUMBER OF MOTOR STARTERS = 3.
5. Verify that the setting for STARTER #3 TYPE is correct.
DVR3 MSSD FAIL TO ACT (664)
DVR4 MSSD FAIL TO ACT (687)
Description: MSSD monitors the solid-state output of U1 and driver TY for
proper operation. If either one fail in the off position this fault is generated.
When terminal OL2 is 120VAC and the car is commanded to run up, termi-
nal SSD should be 120VAC.
Troubleshooting:
1. Check the wiring at terminal SSD and OL2.
2. Replace the HC-DVR board.
Table 5.10 Touch Screen Event Listings
Event Description
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