Kohler — Install the program/data files
Installation · 550 controller
From a Kohler service manual — check it applies to your exact model before use.
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Procedure
- Connect PC serial port to controller RS-232 port with null modem RS-232 cable (9-pin male, GM16657 or kit PA-294992)
- Install Program Loader program into PC per TT-1285
- Insert personality profile backup disk and load data per TT-1285
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Source: Kohler service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.