Webasto BlueHeat Installation Instructions Manual - page 17
Basic Troubleshooting
BlueHeat
TM
Coolant Heater
14
Basic Troubleshooting
General Information
This section describes troubleshooting procedures for the BlueHeat coolant heater within the scope of installation.
Troubleshooting is normally limited to the isolation of defective components and provides information on defective
wiring and connections.
Should the heater not function after completing the installation and initial start-up instructions, refer to the
following troubleshooting instructions and information to isolate and remedy the cause for malfunction.
In the event you are unable to remedy a malfunction after following these troubleshooting instructions or for
unanticipated malfunctions beyond what is covered in this troubleshooting section, please contact one of our
Webasto Technical Assistance Representatives for further instructions.
In the USA, call (800) 555-4518
In Canada, call (800) 667-8900
CAUTION
Advanced troubleshooting requires comprehensive knowledge about structure and theory of operation.
Advanced troubleshooting of the heater and components may only be performed by Webasto trained and
certified, professionals.
Before troubleshooting, check for and eliminate the following probable causes for trouble:
• power supply to heater is less than 10.5 volts at main power connections. Charge batteries and perform load
test to ensure proper battery performance.
• blown fuses.
• corrosion on battery terminals for heater, electrical wiring, connections and fuses.
• loose contacts or connectors, wrong crimping on connectors.
• ensure heater and components have been correctly installed following all pertaining installation instructions.
• shut down initiated by temperature limiter.
• heater control unit locked out. Refer to heater lockout reset procedure.
ATTENTION
After correction of a malfunction, a functional test has to be performed with heater installed on the vehicle.
Heater Lockout Reset Procedure
The BlueHeat is designed with a lockout safety feature built into the control unit. After 3 consecutive unsuccessful
startup attempts, the heater will lock itself out from any further start attempts. The heater may also enter the
lockout mode after experiencing an overheat condition.
Before troubleshooting the heater, ensure heater is not in the “Lockout” mode by performing the following reset
procedure:
1. Ensure timer or switch is in the ‘Off’ position. Turn timer or switch to the ‘On’ position. Remove main fuse F1
(15 Amp), reinsert after 5 seconds.
2. Cycle timer or switch off and then back on once more. Remove fuse F1 once again and reinsert after 5
seconds. Heater should attempt to start in 10 seconds after inserting fuse. Coolant temperature must be
below the lower threshold before heater will attempt to start.