MA-003 – MULTITRANS User Guide – Rev 3.0 18-Jan-16 Page 26 of 30
9 OIL FILTER CLEANING
The oil is filtered to prevent particles from entering the product or being returned to the
transformer. Therefore this filter may need occasional cleaning.
Note: A non-critical error in the product data file, such as error code 18 or 20 can be suggestive of such
action.
See Figure 7—1 to view the oil filter connections at the bottom of the product. Figure 9—1
shows a typical oil filter used in the product.
Figure 9—1: Oil filter
Before removing the filter housing, first isolate the product through the external
switch or circuit breaker and ensure that the oil supply valve is closed.
To clean the oil filter:
1. If a measurement is in progress, press the red Stop button. This will abort the
measurement process and return the product to Standby mode. Power off the
product at the external switch or circuit breaker once it is in Standby mode.
2. Remove the 1 in. nut that secures the filter housing using a suitable wrench.
Care must be taken because there is also a spring behind the filter. Note: A little oil
may leak out.
3. Remove the filter and clean it using a brush and compressed air. Then replace the
filter back into its housing and re-secure the housing.
4. Replace the nut, but use a second wrench to hold the filter housing in place while
the nut is tightened to 65 N.m with a torque wrench.
5. Re-energise the product and it will automatically begin measuring at the next
scheduled time.
Note: The compression nuts on either side may need to be loosened slightly to position the filter at a
more convenient angle, but must be re-tightened afterwards.
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