How to PM

HI Arthur,

Not sure how to get the service manual however if you can summarise the problem you are facing, I can help. 

Thank you!

Kind Regards,

Periwinkle

Managing Partner, Dcads International.

The only document I have is a combined operation/service manual.  The only PM requirement is an annual electrical safety test:

PREVENTATIVE MAINTENANCE

RECOMMENDED ANNUAL PERFORMANCE CHECKS

Smith & Nephew recommends that Dielectric Strength, Earth Leakage Current, and Protective Earth Testing be performed annually to assure continued compliance with applicable safety requirements. These tests should be conducted in accordance with specifications UL 2601-1/IEC 60601-1.

Caution: Electrical safety testing should be performed by a biomedical engineer or other qualified person.

Caution: The cabinet should not be opened except by a qualified service person. Tampering by unqualified persons can damage the unit.