Most likely there is air in the lines. It may take several times of pressing the reset button on the front of the Oasis module to get the air out of the lines. If that doesn't work, this is from the service manual.
Flame Out LED ON
Notes:
1 For troubleshooting a flame out, leave the burner switch on the Oasis Remote Operating Panel in the
ON Position.
2 There are two methods to reset the Oasis Heating Module after a flame out has been detected:
1. Turn the burner switch OFF, wait 1 second and turn it ON again.
2. Press the reset button on the front panel of the Oasis Heating Module (this method will be used
in this troubleshooting section).
Check the following before continuing with the troubleshooting:
· The fuel supply from the fuel storage tank to the fuel inlet of the Oasis Heating Module must be from a
dedicated fuel pickup on the top of the tank.
· The fuel level in the fuel storage tank must be above the level of the bottom of the fuel pickup tube.
· The total rise from the bottom of the fuel pickup tube to the fuel inlet on the Oasis Heating Module should not exceed 60”.
· The fuel return from the Oasis Heating Module must go back to the diesel fuel storage tank.
· The fuel line from the diesel fuel tank to the inlet of the Oasis Heating Module must not have anykinks or leaks.
· All fittings must be leak tight.
· External fuel filter must be clear of any contaminants obstructing the flow of fuel.
· The first time that the fuel line is connected to the Oasis Heating Module, there will be air in the line. It
may be necessary to reset the Oasis Heating Module a couple of times to bleed the air from the fuel line.
If any of the above issues were found to be a problem, correct the situation and press the reset button on the front panel of the Oasis Heating Module to allow the burner to fire again.
And here is a link to the service manual for more information.
https://comnet2.newmarcorp.com/insta...2013OASM12.pdf