8.11.5
Cooling system faults
The following table shows the possible causes of and remedial measures for faults on forced-
ventilated machines.
Table 8-4
Cooling system faults
↓ High temperature rise with load
Possible causes of faults
Remedial measures
X Wrong direction of rotation of the external fan Check the electrical connections to the external fan.
X External fan is not running
Check the external fan and its connections.
X Reduced air flow
Check the air ducts; clean the machine.
8.11.6
Cooling system faults
The following table shows the possible causes of and remedial measures for faults on water-
cooled machines.
Table 8-5
Cooling system faults
↓ High temperature rise
↓ Water leaking
Possible causes of faults
Remedial measures
X
Reduced cooling
Check the cooling water flow, increase the amount of cooling water if
necessary
X
Cooling water flow rate too low
Clean the air-to-water heat exchanger.
X
Inlet temperature too high
Set the correct upstream temperature.
X
Cooling water supply switched off
Switch on the cooling water supply.
X
Cooling water contains frost or anti-corro‐
sion additives
Use cooling water of the agreed quality.
X
X Defective cooling water pipes / defective
cooling water connection
Locate the leaky section and seal it or consult the manufacturer.
Operation
8.11 Faults
SIMOTICS HV M 1RN76308PR900CG0-Z
Operating Instructions 07/2018
85
Summary of Contents for SIMOTICS HV M
Page 2: ...03 07 2018 13 28 V3 00 ...
Page 22: ...Description SIMOTICS HV M 1RN76308PR900CG0 Z 22 Operating Instructions 07 2018 ...
Page 86: ...Operation 8 11 Faults SIMOTICS HV M 1RN76308PR900CG0 Z 86 Operating Instructions 07 2018 ...
Page 122: ...Service and Support SIMOTICS HV M 1RN76308PR900CG0 Z 122 Operating Instructions 07 2018 ...
Page 128: ...Quality documents SIMOTICS HV M 1RN76308PR900CG0 Z 128 Operating Instructions 07 2018 ...
Page 130: ...Additional documents SIMOTICS HV M 1RN76308PR900CG0 Z 130 Operating Instructions 07 2018 ...
Page 135: ......