HP code on Aquacomfort heat pump

[PoolDoc]

Is this something easily fixed or is a service call necessary.

I don't know; here's the manual: http://www.aquaheaters.com/ownersmanual_inground.pdf

And here's their contact info -- call them:

http://www.aquaheaters.com/
P.O. Box 1520
Sykesville, MD 21784-1520
(410) 549-6083
Fax: (410) 549-6082