Xylem H-3551 - Manual (Page 17)

Chapter 4
Maintenance/Trouble Shooting
H-3551
Maintenance 4-1
4.1 Maintenance
Sustained operation of the H-3551 is almost maintenance-free. Because the compressor only runs
for a few seconds every hour, it will last for many years. The H-3551 includes safety provisions
that will not allow the compressor to run continuously for long periods of time. This protects the
pump and other components in case of a plugged orifice or other malfunction.
Periodically check your gauge station battery to ensure it is in good condition for pumping together
with any other equipment that you have installed in the gauge station.
From time to time check the inlet line filter (located between the manifold and the suction side of
the pump) for any blockage or restriction. If blockage or restriction is present, the filter must be
replaced.
All fittings must be secure. At 60 bubbles/minute, even a tiny leak will allow the entire gas flow to
escape.
4.2 Trouble Shooting
It is unlikely that this manual will ever contain trouble shooting tips to cover every problem that
will be encountered. Feedback from customers is very valuable and greatly aids in the quest for
constant product enhancement. Please feel free to call the factory for technical assistance and also
with solutions you have found to past problems.
The following list of problems and possible solutions.
H-350 reports “H-355 NOT RESPONDING”
! Verify the power connections to the H-3551. Reinitialize the internal controller by momentarily
unplugging the RS-485 control cable connector.
! Check all connections including Power, Gnd and the RS-485 communication connector. +12V
power must be supplied via both the compressor power terminals and the RS-485 connector
(from the data logger).
Intermittent Operation
! Check your power and ground connections. Moisture over time can oxidize and corrode the
battery terminals, connectors and pins.
! Measure the power supply/battery voltage at the input terminal strip while the pump is running.
! The H-3551 has several safety features which may suspend pumping in order to preserve a dead
battery. Refer to Chapter 2