Ion Science Hydrosteel 7000 - Manual (Page 38)

Hydrosteel 7000 MANUAL Ion Science Ltd
Page 38 of 43
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Fault finding and diagnostics
Fault findings
WARNING!
Ensure plant safety before starting maintenance. Certified test equipment should always be used unless a
gas clearance certificate has been issued.
The following table lists the fault outputs and their consequences. Please contact Ion Science or your local
Hydrosteel representative if you need any assistance.
Symptom Cause Check
No LED lights No power,
Incorrect wiring
Fuse has blown
Ensure that there is 15 V d.c. across the power
terminals at the unit. Check the polarity; that
the positive wire goes to the + terminal.
If the voltage and polarity have been incorrectly
applied then the fuse may have blown. Note if
the fuse has blown the instrument will need to
be returned to Ion Science Ltd.
Green LED flashes
continuously. * Insufficient power unit keeps
on resetting Ensure that there are 15 V across -+ power
terminals at the unit.
* Note the green LED will go off for 2-3 seconds
when the pump starts.
Green with alternate
quick Flashes of the
Red LED
Fault has occurred since last
data download or last
operation. Fault is not
currently present and unit is
operating correctly
Perform a data download and look at the log of
diagnostics to identify the fault. See diagnostics
matrix below for resolve the issue.
RED LED lights Unit has self diagnosed a
fault Download data to find out specific diagnostic
failure. See diagnostics matrix below for resolve
the issue.
4-20 mA = 0mA No loop power or incorrect
wiring
Ensure that there is >8 V across -+ power
terminals at the unit.
Check that positive wire goes to the + terminal.
4-20 mA = 3.5mA Unit has self diagnosed a
fault with given
measurement. 4-20mA 1=
flux measurement ,
4-20mA 2 = pipe
temperature measurement
Download data to confirm fault and follow fault
diagnostics matrix over leaf.
RS232 connection fails Communication parameters
incorrectly set.
Incorrect modem cable.
Check red or green LED is lit
as fuse may have Blown.
Check com port settings
Check the null modem cable used
If the fuse has blown then the coms will not
operate. The unit needs to be returned to Ion
Science Ltd for servicing.