Disruptions; Disruption In Operation; Trouble Shooting - Laird LA 5000 Operation Manual

8 Disruptions

8.1 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 in chapter 9 on page 26.
In case of disruption start with checking the follwing:
• 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.

8.1.1 Trouble Shooting

For trouble shooting you may rely on the following:
• Alarm signalling within the safety circuit of the device to be cooled
• Wiring diagram
• Flow scheme
• Trouble shooting table given below
Problem
The unit does not
start
The unit is
running, but
cooling capacity is
not available or
too low
Noisy unit
Table 10: Trouble shooting list
Laird Thermal Systems s.r.o
27
Operation Manual, 387009851
Possible reason
Electrical connection not correct
or no mains connection
External hoses sharply bent?
Unit properly located?
Is there flow in cooling circuit?
Contents in coolant container low
Fan turning?
Ambient temperature too high?
Contents in coolant container low
Countermeasure
Check connection, insert mains plug, check main
power switch
Pay attention to smooth bends, when hoses are
connected
Clearance to walls not less than 0.5 m
Flow is signalled potential-free by the safety
equipment of the unit and can be visualized in
the range of controls of the device to be cooled.
Check coolant level, refill coolant if necessary
→ page 23
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.
Check specifications → page 16
Refill coolant
Date: 08/09/2022
Version: 1.0
Disruptions
Disruption in Operation
Liquid-Air Cooling Unit LA 5000
387009381