Webasto PosiCharge DVS 300 Operation And Maintenance Manual page 27

DVS Fast Charging System
S) Check for opens in the charge path (contactors, output cables). Check DVS Control
Board connectors P12 (Output Voltage Sense) and P15 (To Contactors). Check that all
wire crimps are secure.
T) Shut down the unit and check for shorts or problems in the output cable. Check current
sensors and check their harnesses P11/P12 for continuity.
U) Undercurrent faults may be caused by a loose connection or faulty contactor in the high
current path. The fault indicates a 15A discrepancy between the current requested and
the current delivered. Check the DVS current sensors, verify that the DVS contactors
are closing and check for loose connections. If the DVS contactors are not closing
check/replace relays K1 to K4 on the control board or the drivers U10 and U71.
Replace the control board if required.
V) Indicates that the 150V DC Buss dropped below 100V or exceeded 200V. Check the
utility power for spikes and periodic phase drops. Transistor faults may be caused by
excessive heat.
W) Current sensor faults may be caused by a poor connection or faulty cable. Check all
connections to current sensor carefully before replacing a current sensor.
X) Indicates that the 150V DC Buss dropped below 110V or rose above 170V creating a
continuous error for 10 seconds.
Y) If there is no sign of excessive heat, a temperature fault may indicate a faulty
temperature switch. In this case, check for normal operation of temperature switches.
Z) Check to make sure that your battery pack is properly wired to the output connector,
and that there are no shorted or damaged cells. Check that connector P12 on the DVS
control board is properly seated and that all pins are making contact. A low Vdc fault
indicates the charger has sensed less than 10V. A High Vdc fault indicates greater than
150V has been sensed by the charger.
AA) Allow the unit to cool down, and verify that the AC input wiring is correct and the intake
and exhaust vents are clear of blockage. Re-start the charge. If the unit overheats
again, contact your Authorized DVS Service Provider.
BB) Charge was terminated before scheduled end. If not terminated by user, check Table
6.1 for possible causes.
CC) Check the AC input with a multimeter to ensure that all three phases are connected and
at the correct voltage. If input power is correct, and the problem persists, contact your
authorized DVS Fast Charging System service provider.
DD) Check the utility line voltage. If the voltage is more than 10% below the rated value,
remove other loads from circuit. If the voltage problem persists, contact your local utility
company.
EE) Exposure to excessive moisture or corrosive environments may cause intermittent
faults. Corroded parts should be replaced.
FF) Use the Charger Configuration menu to clear the 'Battery Backed RAM'. (Note:
Disconnecting the backup battery to the computer board automatically sets this fault.
23411-W-03-01 Page 27 of 29 Webasto Charging Systems, Inc.