Disruptions; Disrupt Operation; Trouble Shooting - Laird OL 4503 Operation Manual

8 Disruptions

8.1

Disrupt 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 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.

8.1.1 Trouble Shooting

For trouble shooting you may rely on the follwing:
 Alarm and error signalling within the safety circuit of the device to be cooled
 Wiring diagram
 Flow scheme
 Trouble shooting table (see below)
Problem
The unit does not start
The unit is running, but
cooling capacity is not
available or too low
Noisy unit
Table 9: Trouble shooting list
Laird Technologies GmbH
Operation Manual (Translation)
Possible reason Countermeasure
Mains cable
Insert mains plug→ page 22
plugged in?
External hoses Pay attention to smooth bends when hoses are
sharply bent? connected
Unit properly
Clearance to walls not less than 0.5 m → page 19
located?
Coolant hoses
Connect hoses considering flow direction→ page 20
connected?
Flow is signalled potential-free by the safety
Is there flow in
equipment of the unit and can be visualized in the
cooling circuit?
range of controls of the device to be cooled.
Cover the ventilation grid next to the fan with a sheet
Fan turning?
of paper. If the paper is sucked and hold by the air
flow, the fan works properly
Ambient
Check specifications →page 16
temperature too
high?
Contents in coolant
Refill coolant
container low.
Date: 06-Jul-2015
Version: 2.0
Disruptions
Disrupt Operation
Oil-Air Cooling Unit OL 4503
1264.00
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