Napoleon NPFX24A Owner's Manual page 40

(3) Clean the dust of sundries on the indoor units.
(4) In the event of rusting, use the anti-rust paint to stop spreading of rust.
7.4 Parts Replacement
Purchase parts from local appointed service center or dealer if necessary. When
user need to replace the mainboard, installer should put old mainboard jumper cap and
the short-driven electrical resistance on the new mainboard. (If there is no short-driven
electrical resistance put on the old motherboard, installer need not to replace
short-driven electrical.)
8 After-Sales Service
Please contact the local Napoleon Dealer for service issues.
35
Air Handlers