Hurricane SCH25, Service And Troubleshooting Manual

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4. Step-by-step Troubleshooting
4.1. Flame Out
Check the following before continuing with the troubleshooting:
• The fuel supply from the diesel tank to the fuel inlet of the heater
must be from a dedicated fuel pickup on the top of the tank.
• The fuel level in the diesel 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 heater should not exceed 60 inches.
• The fuel line from the diesel tank to the inlet of the heater must
not have any kinks or leaks.
• External fuel filter and pipe work must be clear of any
contaminants obstructing the flow of fuel.
• The first time that the fuel line is connected, or if the fuel has run
and been refilled, there will be air in the line. This should be bled
using the bleed tap on the top of the heater whilst the heater is
restarted a few times.
If any of the above issues were found to be a problem, correct the
situation and restart the heater.
Refer to the following underlined statements that best describe the
problem that is being encountered:
When the heater attempts to light, there is no flame and a flame-
out occurs after 7 seconds.
Restart the heater and look through the flame observation window and
check for a glow from the igniter – this should occur after the
combustion fan stops and should last for about 10 seconds.
Q1: Is there a glow in the burner chamber when the igniter should be
on?
IF
NO:
1. Install a new igniter. To install the igniter, refer to 5.3.2.
2. Once the igniter is installed, turn on the heater.
IF YES:
During the first 7 seconds when the fuel pump is running, open
the fuel bleed valve and check the fuel is coming out of the
tap. Proceed to Q2.