JULABO FLW1703 Recirculating Coolers - Manual (Page 30)

30
Error messages Description
-12 TEMPERATURE MEASUREMENT
ALARM
Error in A/D converter.
-14 EXCESS TEMPERATURE
PROTECTOR ALARM
The return temperature is above the switch-off value of
the high temperature warning function of 85 °C.
Check dimensioning of application.
Use a stronger recirculating cooler if necessary.
-20 WARNING: CLEAN CONDENSOR OR
CHECK COOLING WATER CIRCUIT
OF REFRIGERATOR
Cooling of the condenser is affected. Clean air-cooled
condenser.
Check the flow rate and cooling water temperature on
water-cooled condenser.
12. Cleaning / repairing the unit
Caution:
Always turn off the unit and disconnect the mains cable from the power source before
cleaning the unit.
Prevent humidity from entering into the circulator.
Service and repair work may be performed only by authorized electricians.
Notice:
Risk of injury for hands when mounting the venting grid.
RS232 ALARM
Air cooled models = FL
To maintain the full cooling performance, clean the condenser from
time to time.
 Switch off the unit, disconnect mains power cable.
 Hold the venting grid, pull out and remove.
 Clean the ribbed condenser with a vacuum cleaner.
 Replace the venting grid.
 Switch on the unit.