MDC XT 14E 2021 - Diesel Heater Controls & Troubleshooting

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Heater Control Switch
Power on
Press the heating (2 power on) button, the heating (constant power) will flash for 0.3S. The heater will
begin the start stage. The controller will run heating the program according to the temperature control
target set by the control knob. In the start stage, the time delay from switch-on to fuel supply to the fuel
pump is around 65 seconds.
Temperature Control
When the combustor is ignited and running, you can turn the control knob according to the arc mark
around the control switch (1) to control the temperature.
Ventilation mode
You can only enter the ventilation mode when you press the ventilation mode key to start the heater. The
ventilation indicating light turns green after pressing ventilation button. Heater can only circulate air
without any heating. The fan speed can be continuously regulated with the control knob.
Shutdown
To shut down the unit, press the button indicative of the current mode of operation. If the fuel pump is at
work before the heater is turned off, the pump will shut down immediately, but the fan will continue to
run for 180 seconds.
*DO NOT TURN OFF MAIN SWITCH ON PANEL UNTIL THE UNIT HAS COMPLETED ITS SHUTDOWN
PROCESS.
Trouble Shooting
When entering fault mode, the display will flash the LED lights to indicate the fault code. This will be
indicated by:
2 long flashes of 2 seconds followed by a sequence of flashes with a 0.5 second interval. The number of
quick flashes indicates the fault code on the table below.
Times
of
flashes
of LED
Cause of trouble
1
Failure of second start
2
Termination of the third time of combustion
3
Power voltage out of specified range
4
Combustion chamber temperature too high during self-check period
6
Broken circuit or short-circuit of temperature sensor
7
Broken circuit or short-circuit of fuel pump
8
Broken circuit, short-circuit, or rotation clogging of fan motor
9
Broken circuit or short-circuit of glow plug
10
Ambient temperature over high before starting or furnace body
temperature over high during heating process
11
Broken circuit or short-circuit of overheating sensor
12
Broken circuit or short-circuit of control switch
13
Maintenance reminder: More than 800 hours of work time
14
Failure of controller