SSANGYONG REXTON 2006.09 Manual page 796

0-90 6910-01
3) CIRCUIT DESCRIPTION
(1) FFH (FUEL FIRED HEATER) SYSTEM
The system is to increase the coolant temperature quickly by firing diesel fuel in the burner
that is installed in engine cooling system when in winter time the ambient temperature and
engine coolant temperature is low.
(Option)
FFH System consists of independent fuel lines, fuel pump, coolant circuit, coolant ciculation
pump, electrical glow plug and exhaust system by driver's
system is automatically. Operated according to the coolant temperature and the ambient
temperature.
FFH system operates up to more than 2 minutes to burn the residual fuel inside the system
when driver stop the engine during its operation. Therefore, a certain period of FFH operation
after stopping the engine is not a malfunction.
(2) CONTROL AND SAFETY MODE
Heater operations and safety mode
▶
- If the fuel pump
· If the fuel pump fails to ignite within 90 seconds after fuel pumping starts, the start
procedure is repeated as described. If after a further 90 seconds fuel pumping the
fuel pump still fails to ignite, the heater is switched off in fault mode.
The controller is locked after a certain number of failed starts.
· If the flame does out by itself during operation, firstly a new start is activated. If the
fuel pump fails to ignite within 90 seconds after fuel pumping has started again, the
heater is switched off.
· If the heater is overheated (lack of water, poorly vented cooling circuit), the
overheating sensor triggers, the fuel supply is interrupted and the heater is switched
off.
· The heater is switched off if the lower or upper voltage limit is reached.
The fuel pump does not start when the glow plug is defect or electrical lead to the
·
dosing pump is interrupted.
The fan motor speed is monitored continuously. If the fan motor does not start up, is
·
blocked or if the speed falls below 40% of the nominal speed, the heater is switched
off in fault mode after 60 seconds.
It is possible to diagnose the system by connecting the diagnostic device to controller.
·
For details, refer to the "Diagnosis
Emergency shutdown
If an emergency shutdown -EMERGENCY OFF- is necessary during operation, proceed
as follows;
- Pull the fuse (Ef6: 20A) out.
- Disconnect the heater from the battery.
CIRCUIT
REXTON 2006.09
intention because FFH
Procedures" section.
(3) DTC (DIAGNOSIS TROUBLE CODE)