Actions - Webasto PosiCharge DVS 300 Operation And Maintenance Manual

DVS Fast Charging System

6.2.5 Actions

A) Not field serviceable. Contact your Authorized DVS Fast Charging System service
provider.
B) This component may be replaced by a qualified service technician. Refer to the section
listed in the right column for more information. Contact Customer Service for availability
of spare parts.
C) Disconnect AC power and check the 120VAC fuse behind the AC utility power access
panel. A good fuse should measure 0 Ohms across the fuse. If the fuse has blown,
replace it with the same size and rating of fuse.
D) Check that the AC wiring is connected properly to a 3-phase circuit, the unit is
grounded, and that the circuit breaker is closed.
E) Identify equipment that shares the same voltage supply line, and temporarily shut it
down. If the charger starts to respond normally, check the grounds on all of the
installed equipment
F) Check the output wiring of the BMID unit.
1. Ensure that all of the power and signal connectors are completely mated, and that there
is no physical damage to the connector or pitting on the contact that could cause poor
connections.
2. Check that the communication and pilot wires are connected to the unit. Check that all
pins are seated correctly in each connector.
3. Visually inspect the insulation on all of the wires and verify that there are no shorts or
burnt spots on any of the wires. Check the continuity between the wire and chassis
ground using a multi-meter.
4. Verify that the BMID is installed properly (Refer to BMID manual.
G) Visually inspect the BMID and the thermistor. If the potting of the BMID looks cracked,
or the thermistor appears corroded, avoid erratic charging by replacing these
components even if functional problems have not yet occurred. Temporarily attach
another BMID or thermistor to the pack. If the problem is resolved, replace the bad
component. If the problem persists, plug the vehicle into another charge port. If this
corrects the problem, check continuity on all BMID interfaces on the original charge
port.
H) The DVS Fast Charging System contains built-in safety systems, which will fold back
charge in response to high battery temperatures, and stop charge completely if the
batteries get above a manufacturer's specified threshold temperature. If the charger
has stopped because of a false reading of a high battery temperature, check the
installation of the BMID and the integrity of the thermistor, reinstall or replace as
needed. If the batteries are overheating, allow the batteries to cool down before
charging again. (Note: Use of ventilated battery packs and/or fans may be required in
certain applications. Contact Customer Service)
I) If a cell within a pack is failing, or a failed module has been replaced with a new module,
there will be a state of charge (SOC) mismatch within the pack, which will prevent the
pack from charging properly. Before running a fast charge, make sure you run a long
23411-W-03-01 Page 25 of 29 Webasto Charging Systems, Inc.