JULABO LH 85 High Dynamic Temperature System - Manual (Page 60)

Troubleshooting guide / Error messages
60
CODE 14
 Safety sensor defect >TANK<
 The safety temperature value lies below the working temperature
setpoint. Set the safety temperature to a higher value.
 The temperature system is operated without bath liquid, or the liquid
level is insufficient. Replenish the bath tank with the bath liquid.
 Tube breakage has occured (insufficient filling level due to excessive
bath liquid pumped out). Replace the tubing and replenish the bath tank
with the bath liquid.
 The float is defect (e. g., because damaged in transit). Repair by
authorized JULABO service personnel.
CODE 15
 External control selected, but external Pt100 sensor not connected.
CODE 16
 Heating circuit interrupted.
CODE 17
 Heating circuit short-circuited.
CODE 31
 Communication between control module RD and instrument interrupted.
Warning
CODE 40
Warnings without a complete shutdown of the unit
CODE 03
 Excess temperature warning
CODE 04
 Low temperature warning
CODE 20
 Cooling of the condenser is affected. Clean air-cooled condenser.
Check the flow rate and cooling water temperature on water-cooled
condenser.
CODE 21
 Compressor stage 1 does not work.
Check mains circuit breakers F1 and F3, both might have triggered.
Reset circuit breakers if necessary (see below).
CODE 40
 Low liquid level warning in the internal reservoir
CODE 41
 High liquid level warning in the internal reservoir. (LH85)

 These messages appear every 10 seconds as long as the compressor
is not switched on although requested by the instrument.
 After a short cooling interval, the motor will be automatically
reconnected and the message " CODE XX " no longer appears.