The audit found that the hot water pump installation Make the "AL" alarm was reset overload and therefore make the system run. I found it works normally (trial system run half an hour).
The audit found that the hot water pump mounted machine alarm "AL" and has not reset overload the system and run it again. Found that the machine can operate normally (system test run for half an hour).
Investigation found that pump hot stick to alarm "AL." therefore, reset overload and the run system again, it was found that the machine can work normally (experiment. Run half an hour).