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Air Top 2000
9.
Repair
9.1
General
This section describes the repairs that may be per-
formed on the air heater Air Top 2000 and Air Top 2000
Diagnosis serial no. 30.000 and up when removed.
Any further disassembly will void the warranty.
For reassembly only components of the proper spare
kits are to be used.
9.1.1 Work on Components after Disassembly
CAUTION
All gaskets located between disassembled components
as well as the exhaust outlet seal must always be re-
placed and discarded.
9.1.1.1 Cleaning
l
All components disassembled must be cleaned with
cleaning spirit and subsequently dried with press-
urized air.
l
All sealing compound must be carefully removed
from components using a suitable tool.
9.1.1.2 Visual Inspection
l
Examine all components for damages (cracks, defor-
mation, wear, etc.) and replace as necessary.
l
Examine connectors and wiring for corrosion, loose
contacts, wrong crimping, etc. and repair as necess-
ary.
l
Check terminals for corrosion and contacts for
security. Repair as required.
9.1.2 Incorporation of Modifications
The continous design improvement of the heaters is in-
tended to optimise their serviceability avoiding failures or
malfunctions.
In general equipment in service may be retrofitted with
available modification kits. In the following that modifica-
tion which may be incorporated easily during maintenace:
l
installation of an external temperature sensor for opti-
mising temperature control Air Top 2000 Diagnosis
(see 9.1.2.1).
l
installation of an external temperature sensor for opti-
mising temperature (see 9.1.2.2) (only for 12 Volt
heaters Air Top 2000 without Diagnosis).
NOTE
9.1.2.1 Installation of an External Temperature
Sensor (Air Top 2000 Diagnosis)
General
The heater Air Top 2000 regulates the desired tempera-
ture best when its temperature sensor is exposed to the
air temperature of the most probable surrounding in use.
This might not always be possible due to the installation
conditions with the temperature sensor being integrated
in the heater. In such case the best temperature control
may be achieved by installation of an external tempera-
ture sensor in the relevant room area.
Procedure
1.
Select adequate installation location for external
temperature sensor.
l
Temperature sensor should not directly be exposed
to heated air flow or located in the vicinity of heating
sources (e.g. vehicle own heater)
l
For installation of the sensor in the motorcar we
recommend to locate the sensor in mid height in
possibly vertical location.
l
The installation location should not be exposed to
direct sun light.
l
Do not mount temperature sensor behind curtains or
similar.
2.
Mount external temperature sensor and route cable
to control unit.
3.
Connect connector X9 and place cover.
4.
Perform test run and check control behaviour.
External
Temperature Sensor
9
Repair
NOTE
Control Unit
X9
Cover
Connector X9
901
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