Troubleshooting Reference
Manual # 42-02-1P28 A3 5-71
DVR2 MSSD FAIL TO ACT (631) Description: When the controller is configured for a solid state starter,
output terminal SSD on HC-DVR board #2 has 120 VAC while solid state
device U1 is not in the On state.
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 that the setting for NUMBER OF MOTOR STARTERS = 2.
4. Verify that the setting for STARTER #2 TYPE is correct.
5. Verify that voltage is not being fed to terminal SSD on HC-DVR board #2
from another source.
6. Verify that solid-state device U1 has not been damaged by shorted wir-
ing connected to terminal SSD (Call MCE Tech Support for details).
DVR2 MSSD FAIL TO DEACT (644) Description:
MSSD monitors the solid-state output of U1 and driver TY for proper opera-
tion. If either of them fails in the on position, this fault is generated. When
either one fails to deactivate when expected, this fault is generated. When
the OL2 is 120VAC and the car is idle, terminal SSD should be low.
Troubleshooting:
1. Check terminal SSD wiring.
2. Replace the HC-DVR board
DVR2 MTD FAIL TO ACT (622)
DVR3 MTD FAIL TO ACT (655)
DVR4 MTD FAIL TO ACT (688)
Description: The MTD input monitors the status of the TD triac and the TD
triac driver. When either one fails to activate when expected this fault is
generated.
Troubleshooting:
1. Check the starter configuration and programming record.
2. Check motor contactor wiring and voltages at terminal DD1 on the HC-
DVR board.
3. The TD triac may have failed open. Replace the HC-DVR board.
DVR2 MTD FAIL TO DEACT (623)
DVR3 MTD FAIL TO DEACT (656)
DVR4 MTD FAIL TO DEACT (689)
Description:
The MTD input monitors the status of the TD triac and the TD triac driver.
When either one fails to deactivate when expected this fault is generated.
Troubleshooting:
1. Check the starter configuration and programming record.
2. Check motor contactor wiring and voltages at terminal DD1 on the HC-
DVR board.
3. The TD triac may have shorted. Replace the HC-DVR board.
DVR2 MTM FAIL TO ACT (618)
DVR3 MTM FAIL TO ACT (651)
DVR4 MTM FAIL TO ACT (684)
Description:
The MTM input monitors the status of the TM triac and the TM triac driver.
When either one fails to activate when expected this fault is generated.
Troubleshooting:
1. Check the starter configuration and programming record.
2. Check motor contactor wiring and voltages at terminal M1 on the HC-
DVR board.
3. The TM triac may have failed open. Replace the HC-DVR board.
DVR2 MTM FAIL TO DEACT (619)
DVR3 MTM FAIL TO DEACT (652)
DVR4 MTM FAIL TO DEACT (685)
Description:
The MTM input monitors the status of the TM triac and the TM triac driver.
When either one fails to deactivate when expected this fault is generated.
Troubleshooting:
1. Check the starter configuration and programming record.
2. Check motor contactor wiring and voltages at terminal M1 on the HC-
DVR board.
3. The TM triac may have shorted. Replace the HC-DVR board
Table 5.10 Touch Screen Event Listings
Event Description
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