SERVICE MANUALCONTENTS1. REFERENCE MANUAL ................................... 32. SAFETY PRECAUTION................................... 43. SPECIFICATIONS ............................................ 64. PART NAMES AND FUNCTIONS .................. 85. OUTLINES AND DIMENSIONS ....................... 96. WIRING DIAGRAM .........................................117. FIELD WIRING ............................................... 178. WATER SYSTEM DIAGRAM ......................... 199. CONTROLS ................................................... 2210. TROUBLESHOOTING ................................... 4311. DISASSEMBLY PROCEDURE ...................... 6012. SUPPLEMENTARY INFORMATION ............. 8013. SERVICE AND MAINTENANCE ................... 81Note:• This manual describesservice data ofHydrobox only.MAIN REMOTECONTROLLERPARTS CATALOG (OCB712)HYDROBOXOctober 2020HYDROBOXNo. OCH712REVISED EDITION-C[Model Name]EHSD-MEDEHSD-VM2DEHSD-VM6DEHSD-YM9DEHSD-YM9EDEHSD-TM9DERSD-MEDERSD-VM2DERSD-VM6DERSD-YM9D[Service Ref.]Refer to page 2.EHSC-MEDEHSC-VM2DEHSC-VM6DEHSC-YM9DEHSC-YM9EDEHSC-TM9DERSC-MEDERSC-VM2DERSC-VM6DERSC-YM9DRevision:• ERSD-VM6D, ERSD-YM9D, ERSC-VM6D,ERSC-YM9D andERPX series have beenadded.• Some descriptionshave been modified inREVISED EDITION-C.OCH712B is void.EHSE-MEDEHSE-YM9EDERSE-MEDERSE-YM9EDEHPX-VM2DEHPX-VM6DEHPX-YM9DEHPX-MEDEHPX-YM9EDERPX-MDERPX-VM2DERPX-VM6DERPX-YM9D