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UUT Problem
Unit alarms with the
following message on
LCD
' Pump Over Current
0,(code line failure),0,0
Unit alarms with the
following message on
LCD
' TSH: HE_54CP'
Unit alarms with the
following message on
LCD
' TSH: HE_98CP'
Unit alarms with the
following message on
LCD
' TSH: SE_TACF'
No response to Host
Communications.
Remote Alarm Output
not operating.
62
Possible Causes
A pump over current condition
has been signaled to the Main
Board processor.
Pump failure.
PSU Board failure of pump
current sense circuitry.
Main Board failure
Unit has failed temperature
calibration for its 54°F point.
Main Board failure most likely.
Unit has failed temperature
calibration for its 98°F point.
Main Board failure most likely.
During temperature calibration
an error greater than can be
compensated for has been
detected.
Main Board failure is most likely.
PSU Board
Main Board fault.
PSU Board or Main Board fault.
Further Checks
Swap or test Pump Assembly.
Swap or test PSU Board.
Swap or test Main Board.
Check output of isolated supply
module on Main Board +5VI,
+/-15VI and VREFI.
Check output of isolated supply
module on Main Board +5VI,
+/-15VI and VREFI.
Check VREFI supply.
Swap or test PSU Board.
Swap or test Main Board.
Check continuity of PSU Board
to Host Comms Port cable on
rear panel.
Stimulate an alarm condition by
adjusting a parameter alarm to a
minimum level and applying a
higher stimulus to the unit.
Check remote alarm output as
shown in section 0.
Swap or test PSU Board.
Swap or test Main Board.
Check continuity of cable
between PSU Board and
Remote Alarm socket on rear
panel.
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