Webasto PosiCharge DVS 300 Operation And Maintenance Manual page 28

DVS Fast Charging System
When reconnected the fault must be cleared) If the fault continues the memory/clock
backup battery may need to be replaced.
GG) Not used
HH) Not used
II) If the display is intermittent or dark, the display connector may be loose. Open the unit
and inspect the control board to display interface. Check to make sure that all standoffs
on the control board are screwed down firmly to the front panel and are securely holding
the control board at all locations. Correct any problems found with the standoffs and
cycle power to the DVS. If this does not correct the problem, replace the door
assembly. Burned out LED's usually indicate a damaged membrane. Replace the door
assembly.
JJ) A power imbalance in 500A mode is indicated when the DVS is delivering unequal
current through each channel. This can result from a contactor problem, a loose
connection in the high current path of one channel, a malfunction in the current sensor,
or a malfunction on the control board.
KK) If a VBAT MISMATCH error occurs, check the DVS display and observe the voltage. If
the voltage looks correct for the battery, the problem is most likely in the high current
path or the voltage sense path. Check for continuity throughout the high current path
from the power board to the battery in the vehicle. Check that all cables connections
are tight and that all contactors in the path are functioning properly.
LL) If the voltage observed on the DVS display does not seem appropriate for the battery in
use, the problem is in the BMID and the BMID should be replaced.
MM) If an invalid pilot signal is indicated, check the pilot signal wiring. If the pilot signal
wiring and connections check out, check the charger with another vehicle to isolate the
problem to either the charger or the vehicle. If the problem goes away when another
vehicle is used, replace the BMID in the vehicle that caused the fault. If the fault
persists when the vehicle is changed, replace the control board in the DVS.
NN) Reseat the power stage Temp Sense connectors. Check the heat sink thermistors
(Resistance should be greater than 60K ohms).
OO) Connect a vehicle to any charging port to wake system up from energy-saving
shutdown.
23411-W-03-01 Page 28 of 29 Webasto Charging Systems, Inc.