Test Procedures - Webasto DBW 2010 Installation Manual

Test Procedures

Setup
- Remove connector blocks from heater control unit, inspect for
loose wires, corrosion and proper wire connections.
- Plug control unit connector blocks into tester.
- Put heater switch/timer to "ON" and turn vessel heater valve to
"FULL" mode (if equipped).
- Proceed to component test procedures.
Component Test Procedures
Test Setup Result
Tester connected Battery LED (1) unit Lights up
CONRTROL
THERMOSTAT LED (2)
Lights up
Push Fuel Solenoid
Valve button (7) several clicking of solenoid should be
times heard
Push IGNITION SPARK sparking should be heard
COIL button (6)
Turn motor switch (5) motor should run
"ON"
Turn WATER PUMP (4) pump should run
"ON"
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If Not
- test input voltage at control terminals B4 (+) and
B2 (-)
- check battery connections
- check battery voltage
- test switch/timer
- test control thermostat on heater
Normal Operating Range
- approx. 158°F or higher open (no heat required)
- approx. 140°F or lower closed (heat required)
- test temperature fuse (if equipped)
- test overheat limiter
- test solenoid valve
- check electrode gap
- ignition spark coil
- test motor
- test pump
Webasto Product N.A., Inc.
Troubleshooting
WARNING
Do not attempt to test or run
heater with burner head open.
Ensure burner head is properly
closed and secured in place.
NOTE
Make sure Water Pump
and Motor switches (4,5)
are in "OFF" position
before connecting to
heater.
NOTE
Since the heater operates
in the 60 °C (140°F) to 70
°C (158°F) (On to Off/Off
to On) range, if the
vessels engine is hot (e.g.
coolant above 70 °C
(158°F), the heater will
not start until the coolant
temperature drops
below 60 °C (140°F).
THIS IS NORMAL.
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