Webasto Air Top 2000 ST B User manual

Dear Webasto Customer,
Thank you for choosing the Webasto Air Top 2000 ST air heater.
The Air Top 2000 ST heater is used
– to heat cabins, boats, trucks, minibuses, vans and motor-homes and
– to defrost vehicle windows.
We presume that the principle and mode of operation of your new heater has
been explained to your complete satisfaction by the workshop/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 the Air Top 2000
ST heater.
Repair or maintenance work not described here may only be carried out by an
authorized Webasto dealer.
1. When heater is in use, the surface of the hot air outlet will become hot to the touch.
Contact with skin may cause burns.
2. Webasto heaters must be switched “off” when re-fueling at filling stations and/
or while loading or unloading flammable materials for transport, to prevent the
risk of explosion. Please review the owner’s manual for safety and use
instructions.
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 or Telestart remote is
used.
7. The heater must be checked by an expert at the latest at the start of the cold weather
period.
8. 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
(flashing code), it must be shut down by removing the fuse and must not be reused until
it has been inspected by Webasto-trained personnel.
9. Wherever inflammable vapors or dust may form, the heater must be switched off
as a result of the risk of explosion.
Introduction
Servicing and Safety Instructions
Operating Instructions
Air Top 2000 ST
9010302E_Operating_Instructions_Air_Top_2000_ST_EN_NEW.fm Page 1 Monday, December 7, 2015 12:39 PM

10. The heat transfer unit on air heaters is exposed to very high thermal stress and
must be replaced by a genuine Webasto spare part ten years after it is used for
the first time.
If exhaust lines pass through areas used by personnel, they must also be replaced
by genuine spare parts after ten years.
11. The fuel specified by the vehicle manufacturer is suitable for use in the Air Top 2000 ST
B (gasoline).
The diesel fuel specified by the vehicle manufacturer is suitable for use in the Air Top 2000
ST D (diesel).
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.
12. 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.
13. 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.
14. Keep the hot air inlet and hot air outlet free of dirt and foreign bodies. Soiled or blocked
hot air lines may cause overheating.
15. To prevent mechanical parts seizing, the heater should be operated for approx. 20
minutes once a month.
16. Do not stand on the heater and do not place any heavy items on the heater or throw
items at the heater.
17. Do not place any items of clothing, textiles or similar materials over the heater or in front
of the hot air inlet and the hot air outlet.
18. The current of hot air in the heater must not be restricted or blocked by highly
inflammable substances or materials such as rags, cleaning wool, etc.
19. The heater must not be cleaned with a high pressure cleaner.
9010302E_Operating_Instructions_Air_Top_2000_ST_EN_NEW.fm Page 2 Monday, December 7, 2015 12:39 PM

Control Element
Set the rotary knob on the control element to the desired temperature.
NOTE:
To prevent the hot and combustion air fan from blocking or scraping, ensure that
there are no objects on or against the heater before you switch it on.
A separate switch (optional) allows the user to choose between heating and ventilation
mode. In ventilation mode the fan speed depends on the position of the control element
knob.
Rotary knob for:
- Switching on and off
- Setting the room temperature
- Resetting after a fault cut-out
Indicator/error code display
Switch On
Ventilation Option
Changes to the settings
on the control element
will be carried out with
a time delay
9010302E_Operating_Instructions_Air_Top_2000_ST_EN_NEW.fm Page 3 Monday, December 7, 2015 12:39 PM

SmarTemp Control 2.0
Heater ON Example
Press the Webasto button to turn heater on.
Set Temperature Output & Heater Runtime Example
Using the rotary dial and the selection button, follow these steps to set your cab
temperature to 70°F with a runtime of 4 hours.
1. Press the Selection button. Using the rotary dial, select: Options > Duration >
Timed > Adjust runtime to 4 hours. Confirm the adjustment by pushing the
selection button.
2. From the main screen use the rotary dial to adjust the set temperature to 70°F;
confirm the adjustment by pushing the selection button.
NOTE: The set temperature can be adjusted quickly even when the heater is running using
the same method as above.
LCD Screen Symbol Legend
9010302E_Operating_Instructions_Air_Top_2000_ST_EN_NEW.fm Page 4 Monday, December 7, 2015 12:39 PM

Set Timer Example
Set timer to turn on Friday at 6:30AM with a runtime of 60 minutes.
1. Press the Selection button. Using the rotary dial, select Timer.
2. Highlight the timer feature, press the Selection button. Select “edit” from the
sub-menu.
3. Adjust and select day for Friday.
4. Adjust and select time for 6:30AM.
5. Adjust and select runtime for 60 minutes.
6. Settings are saved each time the selection button is pressed.
Refer to Menu Descriptions Table for a detailed description of each menu item and its default
setting.
Definitions Default
Mode Mode changes the operation of the heater between
heat mode and ventilation mode. Status indicator lights
will illuminate red for heat mode and blue for
ventilation mode when the selected mode is active.
Note: Refer to Status Indicator Light description on
page 6 for additional Status Indicator explanation.
Heat Mode
Language Language changes between English, Spanish, and
French.
English
Temp Unit Temp Unit changes between Fahrenheit and Celsius
units of measure.
Fahrenheit
Options Advanced level adjustments; see below.
Duration Duration allows for the selection of continuous heater
operation or timed operation (30 minutes – 14 hours in
30 minute increments).
IMPORTANT: Timed duration is not to be mistaken for
Timer functionality. The duration times above are used
when turning the heater on manually. I.e. set the heater
duration for 8 hours before heading to bed.
Note: If timed operation is selected 10 hours is default.
Continuous
9010302E_Operating_Instructions_Air_Top_2000_ST_EN_NEW.fm Page 5 Monday, December 7, 2015 12:39 PM

LVD LVD “Low Voltage Disconnect” allows the user to set
the battery voltage level at which the Webasto
SmarTemp Control 2.0 will shut down the heater.
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
11.4v
24.2v
Password A password can be set to prevent access to the
advanced “Options” menu. Enter a 4 digit code
passcode to begin securing the “Options” menu.
Note: This is typically used in fleet vehicle applications.
OFF
PM Reminder If the heater has not run 30 days, the preventive
maintenance (PM) reminder will alert the operator with
a message to run the heater for 20 minutes. The
indicator lights will flash red as a visual reminder.
The operator will have the ability to Start the 20 minute
maintenance cycle or delay it via a “Snooze” option.
When Snooze is selected the PM reminder will postpone
until 12:00PM the following day.
ON
Time & Date Set time and date using the rotary knob and selection
button. 12 (AM / PM) or 24 hour available.
The Webasto button can be used to go back to the
previous field if additional changes are needed.
12 hour
Offset Depending on the installation location, the temperature
reading may vary slightly. The Offset feature allows a
temperature adjustment of +/- 9°F (+/- 5°C). Adjust this
as necessary to obtain the most accurate ambient
temperature reading.
0°
Default Default allows the user to perform a factory reset of the
control settings.
Note: Heater information will NOT be affected.
N/A
9010302E_Operating_Instructions_Air_Top_2000_ST_EN_NEW.fm Page 6 Monday, December 7, 2015 12:39 PM

If an error occurs, first check the fuse and plug connections to ensure that they are in proper
condition and connected correctly.
If the actions described below do not rectify the error, have the heater checked by Webasto-
trained personnel.
Cause Remedy
No combustion after
start and repeat start
Switch heater unit off (for at least 2 seconds) and then
on again
Flame extinguishes during
operation
Switch heater unit off (for at least 2 seconds) and then
on again
Heater unit overheats and indica-
tor flashes
Make sure that hot air can flow freely,
allow heater unit to cool down,
Switch heater unit off (for at least 2 seconds) and then
on again
Vehicle voltage too low Charge battery
Switch heater unit off (for at least 2 seconds) and then
on again
Cause Remedy
Combustion air and/or exhaust
system blocked
Check combustion air and exhaust system for blockage
Actions in event of faults
Heater unit cuts out automatically
Heater unit emits black smoke
9010302E_Operating_Instructions_Air_Top_2000_ST_EN_NEW.fm Page 7 Monday, December 7, 2015 12:39 PM

If the system is fitted with a combination timer, when an error occurs an error code is output
on the timer's display until the heater has been rectified.
The error code is output if the heater is fitted with a control element after an error has oc-
curred by the switch-on indicator/error code indicator flashing. After a burst of fast flashes
the error code will be output by a sequence of long flashes, the number of which is shown
in the table below.
If serious malfunctions such as overheating or failure to start reoccur, the heater is locked
(F 12) and can be put back into service by disconnecting the power supply with the heater
switched on (e.g. by removing fuse). See heater lockout reset procedure below.
Error code Meaning
F 00 Control unit error
F 01 No start (after 2 starting attempts)
F 02 Flame failure (at least > 3)
F 03 Undervoltage or overvoltage
F 04 Premature flame recognition
F 05 Flame monitor (petrol heater) interrupt or
short circuit
F 06 Temperature sensor interrupt or tempera-
ture sensor short circuit
F 07 Metering pump interrupt or metering pump
short circuit
F 08 Fan motor interrupt or
fan motor short circuit or
fan motor overload or blocked
F 09 Glow plug interrupt or
glow plug short circuit
F 10 Overheating
F 11 Overheating sensor interrupt or overheating
sensor short circuit
F 12 Heater unit lock-out
F 14 Overheating sensor installed incorrectly
F 15 Setpoint generator short circuit
F 18 Low Voltage (SmarTemp Only)
Error code output on combination timer or control element
9010302E_Operating_Instructions_Air_Top_2000_ST_EN_NEW.fm Page 8 Monday, December 7, 2015 12:39 PM

The control unit continuously monitors the heater operation. The control unit identifies errors
on individual heater components and faults during operation. Should the control unit expe-
rience component errors and operational faults, the heater may be shut down.
Causes:
The heater is shut down (fault lock-out) if:
• No or incorrect start
• Temperature sensor defective
• Overheating sensor interrupt or short circuit
• Overheating sensor installed incorrectly
• Ceramic glow pin interrupt or short circuit
• Fan motor overload or blocked or short circuit or interrupt
• Error in the fuel metering pump or circuit
• Under voltage or over voltage for longer than 20 seconds.
• Control unit defective
• Overheating
Effects:
The fuel supply is stopped if the heater overheats.
The heater continues to run in the same way as if it is switched off manually.
After the heater stops the control unit may set in fault lock-out mode.
Heater Lock out Reset Procedure:
1. Using switch or standard timer control, turn heater on
2. Remove the main power connection to heater from battery or pull fuse for a minimum of
20 seconds.
3. Using switch or standard timer control, turn the heater off.
4. Reinstall main heater power connection where previously disconnected.
Rectify the cause of the fault.
IMPORTANT: Heater fault codes can be read using PC Diagnostics, however, the heater
lockout reset must be manually performed using the procedure stated above.
If you have any questions, contact our technical support team at [phone] or via email
at: [e-mail].
Heater Lockout Reset Procedure
9010302E_Operating_Instructions_Air_Top_2000_ST_EN_NEW.fm Page 9 Monday, December 7, 2015 12:39 PM

Webasto Thermo & Comfort N.A., Inc
15083 North Road
Fenton, MI 48430
Technical Assistance Hotline
USA: [phone]
Canada: [phone]
www.webasto.us
www.techwebasto.com
Org. 5/2015 Rev. 11/2015 P/N: 9010302-USA
9010302E_Operating_Instructions_Air_Top_2000_ST_EN_NEW.fm Page 10 Monday, December 7, 2015 12:39 PM