Generally the lack of capacity due to lack of main air flow is relatively seldom and easy to find and cure. interview the staff individually about observations and opinions. conduct laboratory analyses of the properties, which may have some connection to the problem, but are not part of the daily routine analyses, check independently the laboratory results, check the calibration of the control instruments which may have some connection to the problem, laboratory analysis records to find out if any change of product quality has been detected, maintenance log-books to find out what changes or maintenance work on the dryer or its components have been conducted, log-sheets to find out any deviations from usual operating conditions, careful study of the production documentation around the time when the problem appeared, especially: The first approach to most problems involves: However, the paragraph below presents at least some guidelines for the most typical problems. It is impossible to give exact instructions for each case. This may be the case if one of the more sophisticated properties of the powder is deviating from the specification, due to lack of dryer capacity, formation of serious deposits in the dryer, bacteriological problems etc. On the other hand there are troubleshooting operations requiring great effort in analyzing the situation and proposing a strategy for tackling the problem. This is also a kind of mini-troubleshooting intervention. An operator of a spray dryer is exposed every day to situations where he has to decide what to do if, for instance, the final moisture content of the product is suddenly too high.
However, what is understood here as troubleshooting is in fact any intervention that changes the operational parameters in order to obtain the desired result. The expression troubleshooting may sound quite dramatic.
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