Spheros Thermo E 200 - Fan and Combustion Air Intake Line Visual Inspection

Thermo E 200 / 320 5 Troubleshooting and error correction
511
5.5.5 Fan and combustion air intake line visual
inspection
• Inspect a possibly available combustion air intake line
for contamination, condition and deposits.
• Remove hood (see 8.4).
• Inspect fan channels for contamination and deposits.
• Inspect fan and motor shaft mount for cracks, stress
marks and deformations.
• Check circlip for proper fit.
• Install hood (see 8.4).
5.5.6 Burner motor inspection
The motor can be checked by applying 24V DC voltage.
The electrical connection to the control unit must be
disconnected first.
• Disconnect the heater from the vehicle electrical
system.
• Check wether the motor used corresponds to the
heating capacity class.
• Inspect the motor for bearing conditions (stiffness).
For this purpose remove hood as needed (see 8.4).
• Reconnect the heater to the vehicle electrical system.
5.5.7 Electronic ignition unit inspection
NOTE
It can only be verified by visual inspection of the igni-
tion electrode, whether the ignition spark jumps over
to the ignition electrode.
CAUTION
High voltage: The voltage received by the ignition
electrode is >13,000 Volt.
During operation or testing of the electronic ignition
unit, the ignition electrode may not be contacted by
persons or items.
ATTENTION
Do not test or apply voltage to the electronic ignition
unit without an ignition electrode.
Inspect the electronic ignition unit for housing and end
cover damage.
No mechanical damage may be caused or be present on
housing and end cover.
Fig. 502
Fig. 503
Pin 1 & 3
Pin 2 & 3
Overheating protection
Water temperature
sensor
Hood
Fan
Shaft circlip
Fig. 504
Burner motor