MAINTENANCE
HPR400XD Manual Gas Instruction Manual 5-35
Coolant flow tests
Note: The following tests are designed to be completed as you follow the flow chart. They are not designed to be
run independently.
If the CNC screen shows a coolant flow error (093 or 060), turn OFF the system and then ON again to clear the error.
Then perform the following tests to find the cause of the problem.
An in-line flow meter is the most accurate way to measure the flow rate, but can not be used with all the tests described
without custom fittings. An in-line flow meter (part number 128933) is available from Hypertherm. The following “bucket”
tests give a good idea of the flow rate.
Note: the CNC screens shown here are for reference. The screens you work with may look different, but should
have the same functions shown here.
Before testing
Note: Coolant must be drained from the system before the in-line filter is cleaned (step 1 below). The coolant in
the system will drain out as soon as the in-line filter is removed.
1. Clean the in-line filter.
2. Replace the filter element on the rear of the cooler.
3. Verify that the system has the correct amount of coolant when refilling the system after completing steps 1 and 2.
See fill the cooler with coolant in the Installation section.
Filter on the rear
of the cooler
In-line filter
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