VANNER
Incorporated
OWNER’S MANUAL
Vanner High Voltage Distribution Module OWNER’S MANUAL
22
Trouble Shooting an HVDM No-Start Situation
In the event Channel 1 and/or Channel 2 contactors do not close, the following need to be
reviewed/validated;
1. Is the capacitive load
≤ 6,800µF?
2. Is there a short circuit on the output of either channel?
3. Is the high voltage battery within the acceptable input range of 400 - 800VDC?
4. Is the low voltage battery within the acceptable range of 18
– 32VDC?
5. Are the high voltage terminations tightened to the proper torque value?
6. Are the high voltage fuses in place and installation hardware tightened to the proper torque value?
7. Is either high voltage fuse blown?
8. Is the HVIL switch in place and the plunger free to travel?
9. Is the enclosure cover in place and all hardware installed?
10. Is the external HVIL connector fully seated?
11. Is the rectangular I/O connector fully seated?
12. Are the +24V, Ignition, CAN and enable signal wires terminated in the proper locations of the
rectangular I/O connector?
13. Is the +24V ignition signal present upon vehicle startup?
14. Is the enable signal, active low, working properly?
Trouble Shooting an HVDM Abnormal Contactor Open
Situation
The following conditions will cause a contactor to open:
1. The 24V wakeup signal is lost/off.
2. The hardware enable signal is lost or turned off.
3. The input voltage exceeds 860V.
4. The channel current exceeds 160A.
5. The temperature at the input/output terminals exceeds 95°C.
Note
: For additional troubleshooting assistance, reference the "Distribution Module Abnormal Conditions"
section for conditions that will flag faults and affect contact closure.
