ICE MACHINES Q-Model Service Manual

Section 6Electrical SystemHarvest Sequence5. WATER PURGEThe water pump continues to run,and the water dump valve energizesfor 45 seconds to purge the water inthe sump trough. The water fill valveenergizes (turns on) and deenergizes(turns off) strictly by time.The water fill valve energizes for thelast 15 seconds of the 45-secondwater purge. The water purge mustbe at the factory setting of 45seconds for the fill valve to energizeduring the last 15 seconds of theWater Purge. If set at less than 45seconds, the water fill valve does notenergize during the water purge.After the 45 second water purge, thewater fill valve, water pump anddump valve de-energize. (Refer to“Water Purge Adjustment” on Page3-3 for details.) The harvest valvealso opens at the beginning of thewater purge to divert hot refrigerantgas into the evaporator.TB35TB35L1HIGH PRESCUTOUTICE THICKNESS PROBEWATER LEVEL PROBENOT USED(42)CONTACTORCONTACTSL1TB32TB33(64)(66)(51)(55)BIN SWITCH(52)*OVERLOAD(48)(62)(63)(65)R241351C1FC(85) (86)TRANS.1GFUSE (7A)LOW D.C.VOLTAGEPLUG(67)(66)COMPRESSOR(47)S(53)(68)(69)(62)(49)TB34(20)(61)(60)(58)CLEAN LIGHTWATER LEVELBIN SWITCH LIGHTHARVEST LIGHT/SAFETY LIMIT CODE LIGHTTOGGLE SWITCHICEINTERNAL WORKINGOFF VIEWCLEANRUN CAPACITORR R(46) (50)PTCRSEE SERIAL PLATE FOR VOLTAGETB37(59)(56)(45)(21)WATERVALVE(77)HARVESTSOLENOID(76)DUMP(57) SOLENOIDTB31 (98)(73)(22)(80)(81)TERMINATES ATPIN CONNECTIONCONTACTORCOIL(99)WATERPUMP(74)(75)VIEW FOR WIRING6866676269L2 (N)TB30TB30TB30TB30TB30FAN CYCLE CONTROLRUN CAPACITOR**FAN MOTOR(AIR COOLED ONLY)TB30SV1646-5Table 6-5. Self-Contained ModelsFigure 6-5.Self-Contained — Water Purge5. Water Purge (45 Seconds)Toggle SwitchICEBin SwitchClosedControl Board Relays#1 Water Pump Closed / ON#2 Water Fill Valve Cycles OFF then ON#3 Harvest Solenoid Closed / ON#4 Water Dump Valve Closed / ON#5 Contactor Coil Closed / ONCompressorONCondenser Fan MotorONSafety Controls (Which could stop ice machine operation)High Pressure Cut-OutClosedMain Fuse (On Control Board)ClosedPart No. 80-1100-3 6-7