ICE MACHINES Q-Model Service Manual

Section 6Electrical SystemWiring Diagram Sequence ofOperationL1SEE SERIAL PLATE FOR VOLTAGEL2 (N)SELF-CONTAINED MODELSInitial Start-Up or Start-Up AfterAutomatic Shut-Off1. WATER PURGEBefore the compressor starts, thewater pump and water dumpsolenoid are energized for 45seconds to purge old water from theice machine. This ensures that theice-making cycle starts with freshwater.The harvest valve(s) is alsoenergized during the water purge. Inthe case of an initial refrigerationstart-up, it stays on for an additional5 seconds (50 seconds total).TB35HIGH PRESCUTOUTTB32ICE THICKNESS PROBEWATER LEVEL PROBENOT USED(64)(66)(55)(62)(63)BIN SWITCH (65)24135TRANS.1C1F1GFUSE (7A)LOW D.C.VOLTAGEPLUG(67)(66)(68)(69)(62)(20)(61)(60)(58)CLEAN LIGHTWATER LEVELTB37(59)(56)BIN SWITCH LIGHTHARVEST LIGHT/SAFETY LIMIT CODE LIGHTTOGGLE SWITCHICEINTERNAL WORKINGOFF VIEWCLEAN(21) (22)WATERVALVE(77)HARVESTSOLENOID(76)DUMP(57) SOLENOIDTB31 (98)(73)(80)(81)CONTACTORCOIL(99)WATERPUMPTERMINATES ATPIN CONNECTION(74)(75)VIEW FOR WIRING6866676269TB30TB30TB30TB30(49)CONTACTORCONTACTS*OVERLOADRCCOMPRESSOR(47)SRUN CAPACITORR R(46) (50)TB30TB35(42)L1TB33(51)(48)(52)(85) (86)(53)TB34PTCR(45)FAN CYCLE CONTROLRUN CAPACITOR**FAN MOTOR(AIR COOLED ONLY)TB30SV1646-1Table 6-1. Self-Contained ModelsFigure 6-1. Self-Contained — Water Purge1. Water Purge (45 Seconds)Toggle SwitchICEBin SwitchClosedControl Board Relays#1 Water Pump Closed / ON#2 Water Fill Valve Open / OFF#3 Harvest Solenoid Closed / ON#4 Water Dump Valve Closed / ON#5 Contactor Coil Open / OFFCompressorOFFCondenser Fan MotorOFFSafety Controls (Which could stop ice machine operation)High Pressure Cut-OutClosedMain Fuse (On Control Board)ClosedPart No. 80-1100-3 6-3