Troubleshooting
www.webasto.us Webasto Product N.A., Inc. www.techwebasto.com
27
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 If Not
Tester connected Battery LED (1) unit Lights up
CONRTROL
THERMOSTAT LED (2)
Lights up
- 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)
Push Fuel Solenoid
Valve button (7) several
times
clicking of solenoid should be
heard
- test temperature fuse (if equipped)
- test overheat limiter
- test solenoid valve
Push IGNITION SPARK
COIL button (6)
sparking should be heard - check electrode gap
- ignition spark coil
Turn motor switch (5)
“ON”
motor should run - test motor
Turn WATER PUMP (4)
“ON”
pump should run - test pump
Do not attempt to test or run
heater with burner head open.
Ensure burner head is properly
closed and secured in place.
WARNING
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.
To Next Page
Loading...
Need help?
General
