Laird WL3004, Specification And User Manual

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8. Disruptions
Disruption in Operation
The most common reason for disruption in operation of the unit is improper maintenance.
Maintenance should be carried out regularly according to the intervals defined on page 27 .
In case of disruption start with checking the following:

Fan polluted or blocked?

Coolant polluted?

Low coolant contents because of leakage, evaporation or an extended cooling circuit with long
hoses?
More help can be found in the following paragraph.
In case you do not succeed in identifying the problem cause by means of this manual please contact
the service department of Laird Thermal Systems.
Trouble Shooting
For trouble shooting you may rely on the following:

Alarm signaling within the safety circuit of the device to be cooled

Wiring diagram

Flow scheme

Trouble shooting table given below
Problem Possible reason Countermeasure
The unit does not
start
Electrical connection not correct
or no mains connection
Check connection, insert mains plug, check main
power switch
The unit is
running, but
cooling capacity is
not available or
too low
External hoses sharply bent?
Pay attention to smooth bends, when hoses are
connected
Unit properly located? Clearance to walls not less than 0.5 m
Is there flow in cooling circuit?
Flow is signaled potential-free by the safety
equipment of the unit and can be visualized in
the range of controls of the device to be cooled.
Contents in coolant container low Check coolant level, refill coolant if
necessary →
page 22
Fan turning?
Cover the ventilation grid next to the fan with a
sheet of paper. If the paper is sucked and hold
by the airflow, the fan works properly.
Ambient temperature too high? Check specifications → page 16
Noisy unit Contents in coolant container low Refill coolant
10. Trouble shooting list