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8. Disruptions
8.1 Disruption in Operation
The most common reason for disrupt operation of the unit is improper maintenance. Maintenance
should be carried out regularly according to the maintenance intervals defined in chapter 9.
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.
8.2 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
Mains cable plugged in?
Insert mains plug→ page 22
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
→
page
Error! Bookmark not defined.
Coolant hoses connected?
Connect hoses considering flow direction
→
page
Error! Bookmark not defined.
Is there flow in cooling circuit?
Flow is signalled potential-free by the safety
equipment of the unit and can be visualized in the
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
Noisy unit
Contents in coolant container
low
Refill coolant
Table 9:
Trouble shooting list
