Models S 1200, S 2400, S 4400, POU 3300, POU 3500
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22
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6.
Troubleshooting
6.1.
List of Alarms and Warnings
Soft Alarm Display
Description
Solution
“LIQUID LEVEL #1”
Low fluid level below liquid level
switch #1
Inspect the process line for leaks,
and refill the unit with the process
described in the manual.
“LOW DEVIATION”
Process temperature below low
limit but temperature control is still
active
Verify that the deviation alarm
values on the PSC are properly set,
and that the unit is functioning
normally.
“HIGH DEVIATION”
Process temperature above high
limit but temperature control is still
active
Verify that the deviation alarm
values on the PSC are properly set,
and that the unit is functioning
normally.
“FAN FLOW FAULT”
Internal fan is not functioning
properly
Contact LAUDA for service when
able.
Hard Alarm Display
Description
Solution
“SEMISTAT POWER SUPPLY
INTERRUPTION”
Power supply for thermoelectrics
fails self-diagnostics.
Unit must be serviced. Verify if the
alarm is caused by the module or
PSC and contact your service
provider for Lauda-Noah products.
“PROCESS SENSOR FAULT
[RTD]”
Open RTD sensor
Verify that the signal connector
between the PSC and the module
is connected correctly.
“LIQUID LEVEL #2”
Low fluid level below liquid level
switch #2
Inspect the process line for leaks,
and refill the unit with the process
described in the manual.
“TE_OPEN”
Open in thermoelectric circuit
Unit must be serviced. Verify that
the alarm is caused by the
module, and contact your service
provider for Lauda Noah products.
“SHORT”
Short in system
Unit must be serviced. Verify that
the alarm is caused by the
