Structure and Operation
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D760.H03E-001.H1907
cally extinguished during operation, it will be restarted first. If the heater does not
ignite within 90 seconds after the restart of fuel delivery, or even if it is started, but it is
extinguished within 15 minutes, it will fail to shut down, that is, stop the fuel delivery,
and the fan will cool down for about 4 minutes. Failure shutdown problem can be elim-
inated by restarting after a brief shutdown. There should be no more than two
attempts to restart after a brief shutdown. When overheating occurs, the combined
sensor (flame sensor/overheat sensor) reacts, fuel supply is interrupted, and a fault
shutdown occurs. After eliminating the cause of overheating, you can restart the
heater by shutting it down and restarting it. After more than the permitted number of
startup attempts (about 10) and repeated failed attempts, the controller will be locked.
7. In case of failure, shutdown should be checked as follows:
When the heater does not start up after operated, shut down and then restart;
The heater is still not started, so you should check whether there is fuel in the tank;
Whether the fuse is normal; Whether the circuit, connection and joint are in good con-
dition; Whether the combustion air duct or exhaust pipe is safe, if all above are nor-
mal, and the heater is still out of order, or other functional failure, please contact the
maintenance station designated by Dongfeng Commercial Vehicles Co., Ltd.
Maintenance instructions
The heater should be put into trial operation before the warm season. Close the
heater and remove the fuse if smoke is present for a long period of time, abnormal
combustion sounds or obvious smell of fuel or overheating of electrical/electronic
components. In this case, professional maintenance personnel should be the first to
check. After long-term idling, check the openings of combustion air duct, combustion
air supply pipe and exhaust pipe, and clean them when necessary.
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