Homa H307 Manuel D'instructions Original page 38

The machine does not run smoothly and is noisy
Cause
Machine is running in an impermissible operation range
The suction port, strainer and/or impeller/propeller is blocked
The impeller is blocked
Inadmissible levels of gas in the pumped liquid
Two-phase operation
Incorrect direction of rotation
Signs of wear
Defective motor bearing
The machine is installed with mechanical strain
Mechanical shaft seal leaks, sealing chamber monitor reports fault and switches the machine off
Cause
Increased leakage when running in new mechanical shaft seals
Defective sealing chamber cables
Mechanical shaft seal is defective
Further steps for troubleshooting
If the items listed here do not help you rectify the fault,
contact our customer service. They can help you as fol-
lows:
• Telephone or written help from customer service
• On-site support from customer service
• Checking and repairing the machine at the factory
Note that you may be charged for some services provided
by our customer support. Customer service will provide
you with details on this.
38 | ENGLISH
Remedy
Check the operational data of the machine and correct if necessary and/
or adjust the operating conditions
Clean the suction port, strainer and/or impeller/ Propeller
Switch off the machine, secure it against being switched on again and
free the impeller
Contact the factory
Have a specialist inspect the connection and correct it as necessary
Incorrect direction of rotation
Replace worn parts
Contact the factory
Check the installation, use rubber spacers if necessary
Remedy
Change the oil
Replace the moisture sensors
Replace the mechanical shaft seal after contacting the factory