Webasto Thermo Top V Troubleshooting guide

Bedienungs- und Wartungsanweisung
Operation and Maintenance Instructions
Thermo Top V
Mercedes Benz E-Klasse (BR 212) / E-Class (MR 212)

DContent
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Maintenance and Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Heater Unit Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Programming Telestart Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Switching on the heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Feedback from the transmitter upon turning on/off . . . . . . . . . . . . . . . .32
Switching off the heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Switching off using the pushbutton switch . . . . . . . . . . . . . . . . . . . . . . .32
Indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Checking and Setting the Operating Time . . . . . . . . . . . . . . . . . . . . . . . .34
Checking the Operating Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Setting the Operating Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Returning to the Default Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Checking Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Battery change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Fault Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

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Operation and Maintenance Instructions
Thermo Top V for Mercedes Benz E-Class (MR 212)
General Information
Dear Webasto customer,
We assume that the operation of your new heater unit was explained to your
complete satisfaction by the Workshop/Service station that installed it. In these
operating instructions we would like to give you an overview once again of the
use of the Thermo Top V heater unit.

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DMaintenance and Safety Instructions
Within the scope of the European Directive 70/156/EWG type approvals have been
granted for the Thermo Top V water heating unit in accordance with
Directives 2001/56/EG (Heating) and 72/245/EWG (EMC).
The unit must be installed in accordance with the accompanying installation
instructions.
The heater unit must not be operated:
Danger of
Explosion and
Suffocation
•at filling stations and refueling systems.
•in places in which highly flammable gases or dust can
form, and in places in which highly flammable liquids or
solid materials are stored (e.g. near fuel, coal dust, wood
dust, grain warehouses, dry grass and leaves, cardboard,
paper, etc.)
•in enclosed spaces (e.g. garage), and not with the time
switch or remote start.

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The heater unit must not:
The heater unit must:
•be exposed to temperatures higher than 120°C (storage
temperature). Exceeding this can cause permanent damage
to the electronics.
•be operated without at least 20% share of an anti-freeze
approved by the manufacturer in the coolant of the heat
exchanger circuit.
•be operated with the fuel and at the nominal voltage
indicated on the type plate.
•if a large amount of smoke is given off, there are unusual
burning noises or smells, be switched off by removing the
fuse. Before using the unit again, have it checked by trained
Webasto personnel.
•be operated for 10 minutes at least once each month with a
cold engine and the lowest blower setting. At the latest, at
the start of the cold season the heater unit must be
tested by a competent technician.

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DLiability Waiver:
•Not following the installation instructions and the
information contained therein release Webasto from liability.
This also applies for non-specialist repairs or when original
spare parts are not used. This will result in voiding the type
approval of the heater unit and consequently the general
operating permit / EU type approval.

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Heater Unit Operation
The heater unit can be operated by a tip switch or radio control remote
Telestart T91.
The heater unit can also be operated via the telephone with the Webasto Thermo
Call option.
The function "parked-car ventilation" is not available for the E Class (MR 212).
NOTE:
We recommend that the heating time is adjusted according to the driving time.
Heating time = Driving time
For example: With a driving time of approx. 20 minutes (one-way trip), we
recommend not exceeding a switch-on time of 20 minutes.
In Heating Mode, set the vehicle heating to "High" before leaving the vehicle.
NOTE:
The operating period of the heater by Telestart is preset to 30 minutes at the
factory. Alternative heating periods can be programmed with the Telestart T91 in
steps of 10 minutes.

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DThe following settings must be made before leaving the vehicle:
It is not necessary to pre-select the blower speed.
Temperature “HI”
Air outlet “TOP”

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NOTE:
After the settings are made, another approx. 20 sec. must be waited before the
ignition is switched off so that the vehicle saves the settings.
On vehicles with a factory-installed alarm system with passenger compartment
monitoring, the alarm system must be deactivated before leaving the vehicle.
Please refer to the vehicle owner's manual for information.

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DUse
With the Webasto Telestart T91, the heater unit can be switched on and off
wirelessly at a range of up to 600 m. When switching on and off, the transmitter
should be held as high as possible and vertical. When transmitting, do not
cover the antenna with your hand.
The maximum range is increased in open spaces. In built-up areas, make
allowance for a reduced range.

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If you determine from the lack of feedback that the operating signal has not
reached the vehicle, then you must change your position by a few metres.
A higher altitude can also increase the range.
The heater will automatically switch off when the selected operating period has
elapsed.
NOTE:
When the fuel level reaches "RESERVE", the auxiliary heating shall no longer be
operated.

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DProgramming Telestart Transmitter
1. Place batteries into the battery compartment of the transmitter.
2. Remove fuse 1A (black) from the heater's fuse holder (voltage interruption).
3. Wait at least 5 seconds.
4. Replace fuse in heater's fuse holder and within 5 seconds press the OFF button
on the transmitter for at least 1 second.
5. Programming is completed.
A second or third hand-held transmitter can be programmed in the same manner.
NOTE:
The programming process can be repeated as often as necessary. The "oldest"
transmitter will be deleted each time.
1A
1A
min. 5 sec. max. 5 sec. min. 1 sec.
OFF

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Switching on the heater
Hold the transmitter with the aerial upright and press the
ON button until the LED lights up (approx. 1 second).
Feedback of the Telestart receiver to the hand-held
transmitter. The LED on the hand-held transmitter indicates
whether the switch-on signal has been received with short
flashing signals (every 2 seconds).
The operation indicator extinguishes:
– After the preset operating time has elapsed.
– When Telestart is switched off.

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DFeedback from the transmitter upon turning on/off
Switching off the heater
Hold the transmitter with the aerial upright and press the
OFF button until the LED lights up (approx. 1 second).
The transmitter will send a feedback signal.
Switching off using the pushbutton switch
If the heater was activated by means of Telestart, the pushbutton switch must be
pressed once for deactivation.
The LED on the transmitter
lights up for 2 seconds.
The signal has been received and the heater
switched on or off
The LED on the transmitter
flashes for 2 seconds.
Error during signal transmission. Change your
location and repeat transmission.

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Indication
When the auxiliary heating is switched on with the tip switch or the Telestart T91,
the tip switch lights as an indicator.
NOTE:
When switched on with the button, the operating period last used with the
Telestart T91 is always selected.

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DChecking and Setting the Operating Time
The operating time of the heater can be preset on the transmitter in increments
of 10 minutes. The operating time is factory-set at 30 minutes.
NOTE:
The function "parked-car ventilation" is not available for the E Class (MR 212).
We recommend setting the operating time (heating time) according to the drive
time.
With a driving time of approx. 20 minutes (one way), we recommend setting an
operating time of 20 minutes.

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Checking the Operating Time
Simultaneously actuate the ON and OFF buttons within one
second three times in rapid succession.
NOTE:
The first coded flashing signal that is emitted
immediately upon the third actuation of both buttons
has to be included into the count.
The LED flashes in accordance with the preset operating time.
Setting the Operating Time
Press the OFF button to call up the next operating time.
To store the setting:
– do not actuate any button for 10 seconds, or
– actuate the ON button.
No. of coded
flashing signals 123 4 5 6
Operating time 10 min. 20 min. 30 min. 40 min. 50 min. 60 min.
No. of coded
flashing signals 7 8 9 10 11 12
Operating time 70 min. 80 Min. 90 min. 100 min. 110 min. 120 min.
3 x

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DReturning to the Default Setting
Press the ON and OFF buttons simultaneously for
approx. 10 seconds until the LED extinguishes.
Default setting: heating mode, 30 minutes
Checking Battery
Press the ON or OFF button.
Battery LED Action
Almost
spent
Flashes orange for
5 seconds
Replace batteries as
soon as possible or
warm up
transmitter
Discharged lights up for 5 seconds
in orange
Replace battery
or

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Battery change
See also page 30: "Programming Telestart
Transmitter".
Note
Return batteries of our products after use at the
point of purchase or in its immediate vicinity.
Returning them is free. As end user you are legally
obliged to return used batteries.
Caution!
Risk of explosion if battery is replaced by an incor-
rect type! Dispose of the used batteries according
to the instructions. This product is subject of the Eu-
ropean directive 2002/96EC and EN 50419.
Dispose information shall be given either at the
sample or in the user instruction.

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DTroubleshooting
If a fault occurs, check the security and condition of the fuses and the connections.
If there is a malfunction, the heater unit switches to defect lock mode.
Before you visit a Webasto Service station, try to clear the defect lock.
You can rectify the following faults yourself:
Fault Description Possible Cause Corrective Action
Heater unit switches itself
off automatically
(=fault shutdown)
No combustion after
Start and repeat Start,
flame goes out during
operation
Heater unit switches off and on
again (not more often than 2x)
Heater unit does not switch
on
Heater unit has no
power
Check the heater unit power
supply and the grounding point
connection
Heater unit switches off
while heating
(=fault shutdown)
Heater unit has
overheated due to lack
of coolant
Refill coolant according to
manufacturer's specifications.
Bleed the coolant circuit if
necessary.