Webasto Coolant General Operations Manual

Coolant Heater

General Operation Manual

Introduction

Dear Webasto Customer,
Thank you for choosing a Webasto heater.
Webasto coolant heaters are used

– to provide engine pre-heat for boats, trucks, minibuses, vans, motor-homes, etc.
– to provide auxiliary heating for boats, trucks, minibuses, vans, motor-homes, etc.
– to provide area heating through the use of fan-assisted heat exchangers

We presume that the principle and mode of operation of your new heater has been explained to your com­plete satisfaction by the workshop or service center which installed the heater. In these operating instruc­tions we would like to once again provide you with an overview of the safe use of your new heater.

Repair work should only be carried out by an authorized Webasto dealer.

Servicing and Safety Instructions

1. When the heater is in use, the surface of the heat exchanger will become hot to the touch. Contact with skin may
cause burns.

2. Webasto heaters must be switched “off” when re-fueling at gas stations and/or while loading or
unloading flammable materials for transport, to prevent the risk of explosion.

3. The year in which the heater was used for the first time must be permanently displayed on the factory plate by
deleting the inapplicable years from the plate.

4. The heaters are not designed for heating hazardous substance transport compartments.

5. Claims can only be made if it can be verified that the claimant has complied with the servicing and safety instructions.

6. The heater may not be operated in enclosed spaces (such as garages) as a result of the risk of poisoning
and asphyxiation, even if a timer is used.

7. In the event of long-lasting heavy smoke development, unusual combustion noises or a smell of fuel or if the heater
suffers continuous fault cut-outs with error messages (on select models), it must be shut down by removing the fuse
and must not be used until it has been inspected by Webasto-trained personnel.

8. Wherever flammable vapors or dust may form, the heater must be switched off as a result of the risk of
explosion.

9. The heat transfer unit on coolant heaters is exposed to very high thermal stress and must be replaced by a genuine
Webasto spare part after a ten year life cycle.

10.The fuel specified by the vehicle manufacturer is suitable for use in Webasto heaters.
There are no known negative influences due to fuel additives when used appropriately.
If fuel is extracted from the vehicle’s tank, follow the additive instructions issued by the vehicle

manufacturer.
If you change to low-temperature fuel, the heater must be operated for approx. 15 minutes so that the

fuel system is filled with the new fuel.

11.The temperature in the area around the heater must not exceed 85 °C / 185° F (storage temperature). If the
temperature exceeds this level there is a risk of permanent damage to the electronics systems.

12.Non-compliance with the installation instructions and the warnings contained therein will lead to the
exclusion of all liability by Webasto. The same applies if repairs are carried out incorrectly or by untrained
technicians or with the use of parts other than genuine spare parts. This will result in the invalidation of
the type approval for the heater unit.

13.To prevent mechanical parts seizing, the heater should be operated for approx. 20 minutes once a month.

14.Do not stand on the heater, do not place any items of clothing, textiles or similar materials over the
heater or the pipes/hoses carrying heated coolant.

15.The heater must not be cleaned with a high pressure cleaner.

Control Element

Using the Switch

Switching ON:
When the switch is used, the operation indicator (toggle) lights up. Shortly thereafter, the

heater begins operation and delivers heated coolant to the engine or heat exchanger.

Switching OFF:
When heating is no longer required, switch the toggle switch OFF. The indicator light

A separate switch (optional) allows the user to choose between heating and ventilation mode. In ventilation mode the fan

turns off, combustion extinguishes, followed by an after-run cycle.

speed depends on the position of the control element knob.

SmarTemp Control

ON/OFF Button

LCD Screen

*Micro USB
Service Port

* The micro USB service port is not used for heater diagnostic purposes on

SmarTemp Control fc 2.0

Rotary Knob

a

Screw Cap

Selection Button

Menu Description

Refer to Menu Descriptions Table for a detailed description of each menu item and its default setting. Depending on
the SmarTemp version, menu order may vary from below.

aXXX

Definitions Default

Two modes are possible:

- Auto mode enables the pre-defined timer programs. Manual ON/OFF functionality is still possible
while in this mode.

Mode

Language

Duration

Error Code

Options Advanced level adjustments; see below

Time and Date

Timer

LVD

Default

Password

Hour Meter

SW Version

Back Select this to return to the previous screen

- Manual Mode allows the heater to be operated via the Webasto button on the SmarTemp
Control fx 2.0. While in Manual Mode, all Auto Mode functionality is permanently disabled.
Note: While in manual mode the heater will continue to operate based on the pre-defined
“Duration” set by the user. See “Duration” for further detail.

Language changes between English, Spanish, and French.
Duration allows user to select the heater runtime of the heater. Set range is between 10 – 120
minutes selectable by 10 minute increments.
Note: Duration time for all timers will default to the set duration time. User will have the ability to
manually change duration for each timer.
This section will log the last 5 error codes and the date that it was set. Highlight and select an error

code for a full description.
If the heater produces an error code, the status indicator lights will flash red and the error will
display on the main screen. Error codes cannot be reset through the Webasto SmarTemp Control fx

2.0 on the heater, a Webasto PC Diagnostics tool is needed. Refer to the heater service manual for
resetting an error code.
Note: Diagnostics via blink code is not available on
with no blink code functionality can still be obtained using the PC Diagnostics test tool. Refer to the
applicable service manual by visiting www.techwebasto.com for detailed PC diagnostics
information.

Time & Date allows user to properly set the current date and time. User also has the ability to
switch between AM/PM and 24 hour format. If the 24 hour format is selected the date format will
change to dd/mm/yyyy. Use the rotary knob to choose the time / date and the selection button to
confirm each entry. The Webasto button can be used to go back to the previous field if additional
changes are needed.
There are 4 heater start-up cycles possible 7 days per week. The timer is separated into to three categories. The user
can select “Mon-Fri”, set each specific timer (T1 – T4) for a typical work week all at once. A weekend “Sat-Sun”
can be scheduled in the same manner or a full week by using the “Mon-Sun” selection. The “custom” link allows
the user to set a specific timer (T1 – T4) for each individual day.
When selecting a specific timer a sub-menu will appear (Edit, Skip, and Off). To change the timer cycle, select
“edit”. Changes are saved immediately. The “skip” feature allows a timer cycle to be skipped one time within a 7
day period. Timer will reactivate after this one-time skip cycle.
Note: To turn a specific timer off permanently select “off”.

LVD “Low Voltage Disconnect” allows the user to adjust the battery voltage level at which the
Webasto SmarTemp Control fx 2.0 will shut the heater off. A warning (LED and message) will
appear after 8 minutes of low voltage. The warning will remain on for 2 minutes before the heater
is shut off.

If battery voltage is equal to or less than the threshold selected +0.1v, the heater will not start. i.e.
if an 11.5v threshold is selected the heater cannot be started until B+ has reached 11.7v.
12 volt - Range between 11v – 12.5v | 24 volt - Range between 21v – 25.5v

Default allows the user to perform a reset to all default values.
Note: A power loss will not reset user programmed values.

A password can be set to prevent access to the advanced “Options” menu. Enter a 4 digit pass­code to begin securing the “Options” menu.
Note: This is typically used in fleet vehicle applications.

The hour meter logs the operating hours of an active ON signal to the heater. This does not reflect

the true runtime of the heater itself.

Note: For warranty purposes a diagnostic printout is still required where applicable. This hour

meter is for reference only

This displays the firmware version of the Webasto SmarTemp Control fx 2.0. Installed

all coolant heaters. Error Codes on products

Manual

English

60 minutes

No Errors

AM/PM

mm/dd/yyyy

11.4v

24.2v

N/A

OFF

N/A

Version

IMPORTANT - The Red status indicators (heater "ON") and LCD screen backlight turn off after 30 seconds. A touch
of any button or a turn of the rotary knob will re-activate these lights. If the "Webasto" button is used to re-activate
these lights, an additional press of this button is necessary to turn the heater off. Note that when the heater is "ON"
the display is active.