Cooled Stack Power Supply Error Messages; Troubleshooting Considerations; Tubing Connections - Thermo Scientific Accela Open Autosampler Hardware Manual

6
Troubleshooting

Cooled Stack Power Supply Error Messages

Cooled Stack Power Supply Error Messages
Table 30. Stack cooler controller error messages
Message Description
------ Error probe
uuuu Under range
oooo Over range
LbA Loop break
alarm
ErEP EPROM

Troubleshooting Considerations

Tubing Connections

90 Accela Open Autosampler Hardware Manual
The temperature control unit for the stack cooler can display feedback messages in the form of
error messages. See Table
Reason
DC cable disconnected or in
short circuit
Connection mistake
Damaged Probe
Measured variable below the
sensor limit
Measured variable above the
sensor limit
Interruption of loop break
alarm
Error in Eprom
Other messages, such as ErAT and noAT, are suppressed and are not of use in this application.
Note The Temperature Control Unit for the stack/tray cooler does not allow the user to
enter different levels of programming functions. The program is factory set, downloaded
to each Temperature Control Unit at the factory. A power supply programmed for the
PAL Stack Cooler cannot be used for a PAL tray cooler.
This section contains information about special troubleshooting considerations, including
tubing connections and solvent delivery pumps not priming or not functioning.
You must pay special attention to all tubing connections, including these common mistakes in
routine practice:
• Nut and ferrule not connected leak tight (see
• Incorrect pilot distance (see
30.
Check/Solution
Check connection between power supply and
Stack/TrayCooler.
Check signal probe (for example: NTC measures
the resistance: 25 °C = 10 kOhm).
Check the set point for the desired temperature.
Turn the unit off/on. Initialize the Temp.
Control Unit to normal level.
Check the set point for the desired temperature.
Check the set point for the desired temperature.
Turn the unit on/off. Initialize the Temp.
Control Unit to normal level.
Press P.
Nut and Ferrule
"Incorrect Pilot Distance"
Tightening)
on page 92)
Thermo Scientific