Disruptions
Disrupt Operation
27
Laird Technologies GmbH
Operation Manual (Translation)
Date: 06-Jul-2015
Version: 2.0
Oil-Air Cooling Unit OL 4503
1264.00
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
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 19
Coolant hoses
connected?
Connect hoses considering flow direction
→
page 20
Is there flow in
cooling circuit?
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.
Fan turning?
Cover the ventilation grid next to the fan with a sheet
of paper. If the paper is sucked and hold by the air
flow, the fan works properly
Ambient
temperature too
high?
Check specifications
→page
16
Noisy unit
Contents in coolant
container low.
Refill coolant
Table 9:
Trouble shooting list
