Webasto thermo top evo Workshop Manual

Thermo Top Evo 5 Troubleshooting
503
5.5 Component fault entered in the fault memory
Fault
code
(HEX)
Fault
code
(DEZ)
WTT* fault message Fault details with double-
click in WTT*
Recommended workshop
action
00 - No fault No fault No activity required
01 1 Defective control unit Defective control unit, off-line
programming is not per-
formed\or water temperature
sensor defective
Delete fault, carry out fault
release/heater lock-out on
heater (see Section 5.1.1),
restart heater
08 8 Metering pump short cir-
cuit
Metering pump has short cir-
cuit to ground
Conduct electrical test of fuel
system (see Section 5.7, Fig.
504, Point 5)
0B 11 Circulating pump short
circuit
The connected line of the
water pump has a short circuit
to earth\nor the engine is over-
loaded
Conduct electrical test of
coolant system (see
Section 5.7, Fig. 504, Point 9)
10 16 Coolant changeover valve
short circuit
The coolant changeover valve
has a short circuit to earth
Conduct electrical test of
coolant changeover valve (see
Section 5.7, Fig. 504,
Point 16)
13 19 Vehicle fan power circuit
short circuit
The vehicle fan power circuit
has a short circuit to earth
Conduct troubleshooting in
area of vehicle fan (see
Section 5.7, Fig. 504,
Point 13)
15 21 Combustion air fan
blocked
Combustion air fan is blocked 1 Conduct troubleshooting
in combustion air fan (see
Section 5.7, Fig. 504,
Point 8)
2 Conduct troubleshooting
in intake air system (for-
eign body) (see
Section 5.7, Fig. 504,
Point 12)
19 25 Glow/ignition element
power circuit short circuit
Glow plug / electronic ignition
unit has short circuit to ground
Conduct electrical test of
glow plug (see Section 5.7,
Fig. 504, Point 6)
1B 27 Overheat sensor short cir-
cuit
The connected line of the ele-
ment has a short circuit to earth
Conduct electrical test of
temperature sensors (see
Section 5.7, Fig. 504, Point 7)
2D 45 The combustion-air fan
power circuit is defective
Fan motor speed is below value
to be expected
Delete fault, carry out fault
release/heater lock-out on
heater (see Section 5.1.1),
restart heater
Fig. 501 Overview of component faults entered in the fault memory
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Webasto thermo top evo Specifications

General

Brand	Webasto
Model	thermo top evo
Category	Water Heater
Language	English