Eberspächer HYDRONIC B 4 W SC Instruction Manual - page 26
26
Operation and function
4
Control and safety devices
• If the heater does not ignite within 90 seconds
after starting the fuel pump, the start is repeated.
If the heater still does not ignite after another
90 seconds, the heater is switched off. After an
unacceptable number of failed start attempts, the
controller is locked.*
• If the flame goes off by itself during operation, the
heater is restarted.
If the heater does not ignite within 90 seconds
after the fuel pump has started again, the heater is
switched off.
The fault shutdown can be cancelled by switching
off and on again briefly (ignition ON / OFF).
• In the case of overheating (e.g. lack of water, poorly
vented coolant circuit), the overheating sensor
triggers, the fuel supply is interrupted and the heater
switched off.
Once the cause of overheating has been eliminated,
the heater can be started by switching off and on
again (ignition ON / OFF), on condition that the
heater has cooled down again sufficiently, cooling
water temperature <70 °C.
After the heater has been switched off for
overheating an unacceptable number of times,
the controller is locked.*
• The heater is switched off if the upper or lower
voltage limit is reached.
• The heater does not start up when the glow plug is
defect or when the electric lead to the dosing pump
is interrupted.
• The speed of the fan motor is monitored continuously.
If the fan motor does not start up, if it is blocked or if
the speed falls below 40 % of the nominal speed, the
heater is switched off after 60 sec.
* The controller can be enabled again and the faults
read off:
• by connecting up a diagnosis unit
• using the customer service program KD2000.
For operation and fault list, please refer to the
enclosed operating instructions or the troubleshooting
and repair instructions for the heater.
Do not switch the heater off and on again more than
twice.
Emergency shutdown – EMERGENCY OFF
If an emergency shutdown – EMERGENCY OFF –
is necessary during operation, proceed as follows:
• Switch heater off (ignition OFF)
• pull the fuse out or
• disconnect the heater from the battery.
Please note!