Troubleshooting - Heating system
8 - 4
830 / 07.2012
Original operating instructions
8.3 Heating system
Fan not working
Fan cannot be shut off
Fan works with
decreased power
Cause Remedy
Fuse defective or loose – Check the fuse seating and insert
correctly if necessary. Replace the
defective fuse. If another defect
occurs shortly, it indicates a short-
circuit or a blockage. Check the fan
for blockages or other defects and
rectify the fault.
Power supply interrupted – Check the lines for loose contacts
or open circuit.
Blower motor defective – Replace the fan.
Defective operating
instrument
– Check the operating instrument and
replace if necessary.
Cause Remedy
Short-circuit in the cable – Rectify the short-circuit, install a
new cable if necessary
Cause Remedy
Contacts dirty – Clean the plug contact. Be careful
to avoid short-circuits.
Heat exchanger heavily
contaminated
– Clean thoroughly and prevent
damages that could lead to
leakages.
Attention! Please observe the
safety instructions.
Air flow insufficient because
the air filter is blocked
– Clean or replace the filter.