Technical data

5 Troubleshooting
Thermo Top Z/C
502
5.2 Malfunctions
5.2.1 Error Lockout by Malfunction of Heater
In case of a "no flame-up" condition fuel is delivered for a
maximum of 180 seconds.
In the event of overheating (temperature limiter responds)
fuel delivery is stopped immediately.
In all cases of malfunction (except for a defect on the
combustion air fan) there will be an error lockout with a
subsequent run-down. Dependent on the software variant
implemented there might be deviations from the run-down
times specified.
NOTE
An error lockout due to overheating does not display an
indication.
5.2.2 Error Lockout due to Low or High Voltage
A low voltage level of 10.5 ± 0.3 V (measured at the wiring
harness input) over a period of 20 seconds will cause an
error lockout with a run-down of 120 seconds.
A high voltage level of 15.5 ± 0.5 V (measured at the
heater) over a period of more than 6 seconds will also
cause an error lockout with a run-down of 120 seconds.
Error Lockout Reset Thermo Top C with "Timer"
After correction of the malfunction the error lockout is
reset by switching the heater off and on again. In case of
overheating an error lockout reset is achieved by
removing fuse F1, 20A for at least 10 seconds.
The fuse is not blown in case of an overheat condition.
Error Lockout Reset Thermo Top C with "Telestart"
After correction of the malfunction the error lockout is
reset by switching the heater off and on again. In case of
overheating an error lockout reset is achieved by
removing fuse F1, 20A for at least 10 seconds.
The fuse is not blown in case of an overheat condition.
Error Lockout Reset Thermo Top Z
A malfunction will cause an error lockout within the control
unit.
The error lockout condition may only be reset by
disconnection of electrical power to the control unit (e.g.
by removing fuse F1 for at least 10 seconds). The fuse
must be removed with the engine running or within 60
seconds after turning the engine off.