Technical data

5.Error Search and Error Elimination DBW 2010 / 2012 / 2020 / 2022 / 300 / 350
504
5.4 The Error Indications
5.4.1 The heating device does not start working when opened
Is there voltage on B1, B2
and B4? (At control
device 1563/64: Clamp
A1, A2, A3, A4)
YES
NO
Are F2/F3 fuses burned
out? (at control device
1563/64: F1/F2)
Is there passage at
regulation thermostat?
(the heat sensor at
control device 1563/64)
Is there passage at the
regulation thermostat
after cooling of the water
circuit)
Regulation thermostat is
defective, replace it.
Replace the fuses and
start the heating device.
Does the fuse get burned
out again?
The incoming line is
defective (at the control
device 1563/64: control
device is defective)
The temperature in the
water circuit is too high
Search for short circuit
and eliminate it.
Only control device
1563/64: the incoming
line or the temperature
sensor is defective
Is the voltage low? < 18 ±
1.0 V or < 9 ± 0.5 V
(At control device
1563/64: < 20 -1 V or <
10 -1V)
Is there voltage in the
engine (burner fan)?
Is there voltage in the
clamps C2 and C5 of the
control device
The low voltage protection
of the control device has
reacted: charge the
battery
The control device is
defective, replace it.
Check out to see whether
or not the line to the
engine (burner fan)
Can the engine shaft be
rotated easily?
Can the engine shaft be
easily rotated when the
plate of nozzle block is in
dismantled status?
Can the engine shaft be
easily rotated when the
engine is dismantled?
The engine shaft (burner
fan) is detective; replace
it
The engine (burner fan)
defective; replace it
The cylindrical roller of
the fan wheel is defective
Can the large butt gear
be easily rotated?
The fuel tank is defective;
replace it
The engine (burner fan)
is defect; replace it