Connecting to Third Party Holdover Battery Option Hold-over Option Installation Guidelines NOTICE Equipment Damage! Do not use hold-over functionality in a vehicle without extended battery option otherwise the main battery will be depleted compromising the ability to start the engine. WARNING Hazard of Explosion! Improperly installed battery cables could result in a fire, explosion, or injury. Battery cables must be installed, routed, and secured properly to prevent them from rubbing, chaffing, or making contact with hot, sharp, or rotating components. Controller Set-up 1. Gateway Controller software version - GC 4.7 or higher 2.
In order to enable the hold over the dealer have to change the setting of the parameter H1A to HOSTA =1 (The factory setting is HOSTA = 0). To do so follow the process described in Service Bulletin SB 1228 or save the appropriate WINTRAC file. 3. The following parameters are also required to function correctly: [H1d] [HOCFR]=45Hz (Compressor frequency in Holdover state) that allows the maintenance personnel to adjust the operating frequency in holdover state. [H1b] HOTYP=2 (Default setting from factory) that indicates the holdover functionality is performed using the extended battery option. 24 TK 56881-18-IM-EN