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MAN.1095E.REVB.12232014
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
Possible reason
Check/Repair
No display, no fans
No display, no cooling
Loss of AC power
Reestablish AC power
Power supply
24VDC supply
Fuse blown
Replace power supply
Replace fuse
PLC
Loose connector cable
PLC failure
Check cable connections
Contact factory for replacement
No electronics fan
Fan failure
Replace fan
Sample pump not working
System offline
Water carry-over alarm
Ch 1 high temperature alarm
Sample pump malfunction
Place system online
See 'Water carry-over' error
See 'Ch1 temperature >10
°
C' error
Repair/replace pump
'Water carry-over'
Liquid in WCSF
Chiller BTU load high
Peristaltic pump failure
High ambient temperature
Clean WCSF sensor
Reduce sample flow rate
Replace peristaltic tubing
Replace peristaltic pump
Cool enclosure <40°C
“Ch ‘X’ high temp”
Chiller just energized
Allow chiller to cool
Ch 1 temperature >10°
C
Chiller BTU load high
Reduce sample flow rate
Ch 2 & Ch 3 >-10°C
High ambient temperature
Heat sink fan failure
Heat sink fins obstructed
Peltier elements failure
Cool enclosure <40°C
Replace heat sink fins
Clean heat sink fins
Verify wire connections
Replace elements
Replace heat sink assembly
Column frozen
Online column frozen
Reduce dwell time
Check peristaltic tubing
