Marvair SeaMach to FX-2 Conversion Guide

November 17, 2015 2 Rev: 1.04
Introduction:
Marvair Marine sold a number of “Sea Mach” controllers in the early years of
production. These controllers are not available and no direct replacement for them exists.
The following document outlines the steps necessary to retrofit the “Mach Air” style
controller also known as an FX II into the original Sea Mach™ electrical box. This
controller is produced by Microair corp. and is available as a kit that includes most of the
parts needed to complete the installation.
Original Sea Mach™ board FX II completed installation
Materials required:
1. 4mm (#8) spade terminals appropriate for the gauge wire used (usually 14-16
AWG - Blue).
2. Refrigerant pressure switch connector (supplied SUB-072-X06).
3. 20 cm (8 in.) 1.29mm (16 AWG) diameter insulated wire.
4. Butt joint connectors appropriate for the gauge wire used (usually 14-16
AWG - Blue).
5. RJ45 connector strip and crimp tool and 1 RJ45 connector. This is the
standard “CAT5” style tool for 8 pin cables.
6. FXII kit consisting of: mounting plate, FXII control (ASY-360), OLED touch
display (ASY-386) or EasyTouch display (ASY-389), display cable (SUB-
031), and refrigerant pressure switch connector (SUB-072-X06). An optional
air sensor (ASY-056-X15) is recommended to replace the existing air sensor.