Hanna Instruments HI 504903 - Manual (Page 26)

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TROUBLESHOOTING GUIDE
If troubles occur with the HI504903 device, follow the be-
low guidelines.
INTERFACE CONFIGURATION
• One (or more) HI142 datalogger(s) is (are) not recognized
by HI504903 interface during interface configuration with
provided application software HI504903SW on “test device”
procedure.
Possible causes
Configuration parameters for serial com-
munication between HI504903 and
HI142 datalogger are not correct.
Mains power supply missing on HI142
datalogger.
Wiring not correctly performed.
Solutions
Check if the HI142 serial number parameter
for serial communication set with HI504903SW
application software matches with the one of
the datalogger.
Provide the mains power supply to HI142
datalogger.
Check if HI142 datalogger is correctly con-
nected to the HI504903 supervisor.
• During local interface configuration attempt the HI504903SW
software can not connect to the HI504903 interface.
Possible causes
Wiring not correctly performed.
HI504903 interface is busy (a remote
PC communication or remote interface
configuration is already in place, inter-
face is performing the polling procedure
for a not responding device, etc.).
HI504903 is in power failure status.
HI504903 interface is turned off.
Solutions
Check if the HI920010 cable is correctly con-
nected to the RS232 serial port on the PC and
to the auxiliary serial port on the HI504903
interface.
Try to connect later.
Restore mains power supply or wait for power
supply comes back.
Turn on the HI504903 interface.
ERRORS PRIORITY
HI504903 is provided with some selftest procedures and
related “visual” LED indications when some of these tests
failed, in order to make the user understand the interface
related problem (see “Fault conditions and selftest proce-
dures” section).
Only two LEDs (green and red LEDs for SMS sending enable/
disable) are available to give information to the user about
active errors, and no more than one can be shown at the
same time. For this reason every error type has an associated
priority level, as described in the following table:
Error type Priority level
Power failure 4
EEPROM data corruption 3
Cellular error 2
Battery test failure 1
If more than one fault condition occurs simultaneously, then
errors with lower priority level are masked by error with high
one: only error indication with higher priority will be visible
by the user.