Air-To-Water Heat Exchanger Faults; Table 8-4 Cooling System Faults - Siemens SIMOTICS DC 1HS7 Operating Instructions Manual

8.9.4

Air-to-water heat exchanger faults

The following table shows the possible causes of and remedial measures for faults on water-
cooled machines.
Table 8-4 Cooling system faults
↓ High temperature rise
↓ Water leaking
Possible causes of faults
X Reduced cooling
X Cooling water flow rate too low
X Inlet temperature too high
X Cooling water supply switched off
X Cooling water contains frost or anti-corro‐
sion additives
X X Defective cooling water pipes / defective
cooling water connection
SIMOTICS DC 1HS7
Operating Instructions 02/2016
Remedial measures
Check the cooling water flow, increase the amount of cooling water if
necessary
Clean the air-to-water heat exchanger.
Set the correct upstream temperature.
Switch on the cooling water supply.
Use cooling water of the agreed quality.
Locate the leaky section and seal it or consult the manufacturer.
Operation
8.9 Faults
79