Owner manual

Heat Exchanger Care and Water Quality Guide
22
Troubleshooting
Troubleshooting
Symptoms Corrective Action
HPU won't cool (hydraulic
fluid-to-water models)
Verify the proper water connections:
ININ
OUTOUT
Verify that the water temperature vs. flow rate is correct for your
model of HPU (refer to the MTS Hydraulic Power Supply Product
Manual that came with your system).
Verify that the operation of the water saver valve is correct. Adjust it
if necessary (refer to the instructions in the MTS Hydraulic Power
Supply Product Manual that came with your system).
Heat exchanger is plugged
Perform a mechanical cleaning
Perform a chemical cleaning as needed
Install a filter in the cooling water inlet line to prevent the buildup of
sediment
Ensure that you are using clean cooling water
Heat exchanger leaks
externally
Inspect the heat exchanger for signs of corrosion
Repair the leak
If the leak occurs at a fitting, it may be loose. Remove the fitting,
inspect it and repair or replace it as necessary. Re-install the fitting,
being careful not to over tighten it.
Heat exchanger leaks
internally
Disassemble the heat exchanger
Conduct a pressure test to determine the location of the leak
Repair the leak if possible, or replace the heat exchanger