Solar Controller SRK868V6 Installation and Operation Instructionshttp://www.keracontrols.com 4INDEXpage1. Safety information 52. Installation 62.1 Control Panel installation 62.2 Power Module installation 62.2.1 Wall adaptor plate 62.2.2 Wiring 63. System Setup and Operation 83.1 ON /OFF button operation 83.2 Clock preset 83.3 Manual operation 93.4 Temperature display 93.5 System configuration examples 93.5.1 Configuration A 93.5.2 Configuration B 103.6 Differential Temperature control 103.7 Programmable, Temperature controlled heating booster 113.8 Time controlled user Hot Water circulation 123.9 Temperature controlled user Hot Water circulation 123.10 Anti Freeze protection 133.11 High temperature protection ( mode 1) 133.12 High temperature protection ( mode 2) 143.13 “ oC/oF” button 143.14 System protection features 144. Trouble shooting 154.1 Error protection 154.2 Error messages 154.3 Preventing potential errors 155. Specifications 17