Webasto thermo top evo Workshop Manual page 24

5 Troubleshooting
Fault Fault WTT* fault message
code code
(HEX) (DEZ)
38 56 Initial starting attempt failed
39 57 Initial starting attempt failed
– not restarting
3F 63 Wrong version dataset
loaded
4C 76 Overvoltage component
protection
508
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Fig. 502 Overview of general faults entered in fault memory
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Fault details with double-
click in WTT*
No additional information
available
No additional information
available
No additional information
available
Switching off at extremely
high overvoltage for compo-
nent protection
Thermo Top Evo
Recommended workshop
action
In case of frequent occurrence
(> 10):
1) Troubleshooting in air
intake or in exhaust system
(see Section 5.7, Fig. 504,
Point 12)
2) Conduct troubleshooting
in fuel system (see
Section 5.7, Fig. 504,
Point 10)
3) Conduct check of meter-
ing pump (see Section 5.7,
Fig. 504, Point 5)
4) Conduct electrical test of
glow plug (see Section 5.7,
Fig. 504, Point 6)
In case of frequent occurrence
(> 3):
1) Troubleshooting in air
intake or in exhaust system
(see Section 5.7, Fig. 504,
Point 12)
2) Conduct troubleshooting
in fuel system (see
Section 5.7, Fig. 504,
Point 10)
3) Conduct check of meter-
ing pump (see Section 5.7,
Fig. 504, Point 5)
4) Conduct electrical test of
glow plug (see Section 5.7,
Fig. 504, Point 6)
Delete fault, fault release/carry
out heater lock-out on heater
(see Section 5.1.1), restart
heater
Conduct check of vehicle elec-
trical-system supply voltage
(also see Section 5.7, Fig. 504,
Point 1)