Technical data

Air Top 2000 ST Function Tests
601
6 Function Tests
6.1 General
This section describes the tests conducted on the heater
when it is installed and not installed to verify that it is in
working order.
WARNING
The heater must not be operated in enclosed areas such as
garages and workshops without an emissions extraction
system.
IMPORTANT
Complete testing of heater and control unit test for “OEM”
heaters only possible in conjunction with vehicle.
6.2 Required test and measuring
equipment
The test and measuring equipment must be calibrated and
proof of measuring certificates must be available.
Digital multimeter
Testing of electrical resistance [ohms], electrical continuity
≤ 0.1 ohms
Test current < 5 mA
Voltage source, adjustable
Measuring of electrical voltage [V]
10 - 30 V
≥ 30 A
CO
2
measuring unit
Testing of CO
2
value [vol. %]
Maximum ± 0.3 vol. %
Heater test bench *1)
Heater function test
Regarding contact Webasto heater test bench:
International Technical Support - International Hotline:
[e-mail]
PC (personal computer)
System requirements:
– IBM-compatible PC, 486 or higher in accordance with the
operating system requirements
– Main memory ≥ 8 MB in accordance with the operating
system requirements
– Microsoft Windows 98, ME, NT4, 2000, XP or newer
versions
– COMCTL32.DLL, Version 4.70 or higher (can be
downloaded on the Internet (http://www.microsoft.com))
– 3 MB of free memory on the hard disk
– a free COM port (RS232C) or a free USB port
– Optional: Internet connection (for software updates)
– Webasto Thermo Test does not run
under Windows 3.1
with Win32s
Webasto Diagnosis Adapter incl. software
Diagnosis Adapter ID No. 9009064_ is available from
Webasto AG.
Display of fault memory, operating data and control unit
information.
Reference heater Air Top 2000 ST 24V Diesel
The reference heater must be subjected to continual
operating checks.
*1)
The following schematic diagram shows the components
necessary for operating a heater.
Application-specific interfaces must be taken into account.
A calibrated metering pump, which is subjected to continual
operating checks, must be used for testing. The technical
requirements are contained in the Webasto product
documentation. It is preferable to use Webasto
components. Particular attention must be paid to work and
occupational safety.
1 Setpoint generator
2 Electrical vehicle
interface
3 Heater fuse
4 Hot air outlet
5 Heating-air outlet hose
6 Metering pump
7 Fuel filter
8 Fuel standpipe
9 Fuel tank
10 Fuel line
11 Exhaust pipe
12 Combustion-air intake
pipe
13 Heating-air intake grill
14 Standard or
combination timer