HEIL PT 1000, Operation Manual

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Issued September 2017
Compressed Natural Gas (CNG) Option Copyright 2017, Heil Environmental
Printed in U.S.A.
181
HEIL CNr
(CONTINUED)
Solenoid Failure Detection
The system is capable of detecting solenoid failures to
open (in the event of a wiring or component issue) when
the ignition is turned ON as per requirement of NFPA 52.
Whenever there is a single solenoid issue, the main screen
will show which solenoid has failed as seen on the figure to
the top right of this page. However, if there are multiple
solenoid issues, it will tell you to go to alarm summary
screen to get more details as seen in the figure to the
bottom right.
Alarm Summary Screen can be reached
by pressing the right arrow on the display twice.
The figures on this page show example display
screenshots of solenoid failure detection notifications.
Other solenoid failure detection notifications exist and are
not shown here.
To defuel after a solenoid failure on one of the tanks, first
refer to
Solenoid Failure and then use one of the methods
described in CNG Fuel Module Defueling Methods .
NOTICE
The audible buzzer will be active only when ignition is ON
and will not turn OFF until the issue is corrected.
Figure 96. Display Screenshot:
Tank 2 Solenoid Failure
Figure 97. Display Screenshot:
Multiple Solenoids Failed
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