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Troubleshooting
The following table should give an overview of possible errors and an instruction to check and to repair them (is not valid
for the starting-up period of cooler).
TROUBLESHOOTING SHOULD ONLY BE DONE BY AN TRAINED TECHNICIAN.
Error
No display, no fans
No display, no cooling
Power supply
PLC
No electronics fan
Sample pump not working
'Water carry-over'
"Ch 'X' high temp"
Ch 1 temperature >10°C
Ch 2 & Ch 3 >-10°C
Column frozen
Possible reason
Loss of AC power
24VDC supply
Fuse blown
Loose connector cable
PLC failure
Fan failure
System offline
Water carry-over alarm
Ch 1 high temperature alarm
Sample pump malfunction
Liquid in WCSF
Chiller BTU load high
Peristaltic pump failure
High ambient temperature
Chiller just energized
Chiller BTU load high
High ambient temperature
Heat sink fan failure
Heat sink fins obstructed
Peltier elements failure
Online column frozen
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Check/Repair
Reestablish AC power
Replace power supply
Replace fuse
Check cable connections
Contact factory for replacement
Replace fan
Place system online
See 'Water carry-over' error
See 'Ch1 temperature >10°C' error
Repair/replace pump
Clean WCSF sensor
Reduce sample flow rate
Replace peristaltic tubing
Replace peristaltic pump
Cool enclosure <40°C
Allow chiller to cool
Reduce sample flow rate
Cool enclosure <40°C
Replace heat sink fins
Clean heat sink fins
Verify wire connections
Replace elements
Replace heat sink assembly
Reduce dwell time
Check peristaltic tubing
MAN.1095E.REVB.12232014
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