KMD-201AA KMD-201AWA - Hoshizaki

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a. Lower Float Switch 1st Activation: Refill– The refill can occur at any time during thefreeze cycle (1 refill per cycle). As ice builds the water level drops in the reservoir and thelower float switch activates (opens). LED 5 comes on and the control board energizes thefill water valve. The fill water valve remains energized until the upper float switch closes orthe 1 minute fill timer terminates, whichever comes first.b. Lower Float Switch 2nd Activation:The unit is held in freeze by a 5 minute short cycleprotection timer which starts after the thermistor temperature reaches 2°C. After the 1stlower float switch activation and refill, ice continues to form and the water level drops inthe reservoir. When the lower float switch activates (opens) a second time, the freezecycle terminates (freeze can only be terminated on the second activation of the lower floatswitch and after the minimum freeze period). Diagnosis: During the minimum freezeperiod, confirm that the evaporator temperature drops, compressor, fan motors and pumpmotor are energized and that the hot gas valves, harvest water valve and fill water valve(except during refill) are de-energized and not bypassing. Make sure the expansionvalves are operating properly and, in cold conditions. Make sure that the drain water valveis not leaking by (water flowing down the potable drain). Check for proper unit pressures,or an inoperative compressor. Disconnect the 3-pin float switch connector from the controlbox. 15 seconds after disconnecting the 3-pin float switch connector, LED 5 comes onand refill begins. Connect the 3-pin float switch connector back on the control box. Whenthe refill is finished (LED 5 goes off), disconnect the 3-pin float switch connector again. If 5or more minutes have elapsed in the freeze cycle, the unit should switch out of the freezecycle. After the unit switches out of freeze, reconnect the 3-pin float switch connector tothe control box. If the unit remains in freeze with the float switch disconnected, replace theboard. To check the float switch, see "II. 5. [c] FLOAT SWITCH CHECK PROCEDURE."Note: Normal freeze cycle will last 20 to 40 minutes depending on model and conditions.Cycle times and pressures should follow performance data provided in this manual.6) Drain Cycle – The compressor remains energized, the hot gas valve energizes, the fanmotor de-energizes. The drain valve and pump motor energize, allowing water to drainfrom the tank for 20 seconds. This removes contaminants from the water tank.Diagnosis: If the drain valve does not open, check the circuit. Check for proper voltage. Ifwater does not drain out, check and clean the tubing at the drain valve and then checkand clean the valve assembly.7) Normal Harvest Cycle – same as the initial harvest cycle – Return to step 4.Note: Unit continues to cycle until bin control is satisfied or power is turned off. (The draincycle can be adjusted to occur every cycle, or every 2, 5, or 10 cycles. The factorydefault is every 10 cycles.) The unit always restarts at the 1 minute fill cycle.23
2. DIAGNOSTIC CHARTS[a] NO ICE PRODUCTION2. See "II. 6. [b] Bin ControlCheck Procedure."5. See chart [a] [7].24
Page 1 and 2: NO. F037-775ISSUED: JUN. 15, 2009RE
Page 3 and 4: [a] NO ICE PRODUCTION -------------
Page 6 and 7: II. GENERAL INFORMATION1. CONSTRUCT
Page 9 and 10: [e] NORMAL HARVEST CYCLELEDs 5, 6,
Page 11 and 12: 3. CONTROL BOARD* A HOSHIZAKI exclu
Page 13 and 14: [b] FEATURESa) Maximum Water Supply
Page 15 and 16: [c] CONTROLS AND ADJUSTMENTSa) Defa
Page 17 and 18: f) Freeze Timer (S1 dip switch 9 &
Page 19 and 20: 5. FLOAT SWITCH[a] EXPLANATION OF O
Page 21 and 22: 7. SWITCHESTwo different control sw
Page 23 and 24: 2. WIRING DIAGRAM20
Page 25: IV. SERVICE DIAGNOSIS1. 10-MINUTE D
Page 29 and 30: 1. See "II. 3. [d] ControlBoard Che
Page 31 and 32: 1. See "II. 3. [d] ControlBoard Che
Page 33 and 34: V. REMOVAL AND REPLACEMENT1. SERVIC
Page 35 and 36: 2. BRAZINGNote: All brazing connect
Page 37 and 38: 5) Remove the Drier using brazing e
Page 39 and 40: 9) Evacuate the system, and charge
Page 41 and 42: 19) Turn on the power supply.9. ADJ
Page 43 and 44: 7) Remove the Hose Band connecting
Page 45 and 46: 10) Install the new water tank in t
Page 47 and 48: 8) Connect the bin control connecto
Page 49 and 50: 5) Refit the removed parts in the r
Page 51 and 52: 2) Install the new Run Capacitor in
Page 53 and 54: VI. CLEANING AND MAINTENANCE INSTRU
Page 55 and 56: g. Wipe down the float switch housi
Page 57 and 58: [a] STAINLESS STEEL EXTERIORTo prev
Page 59: 4) Turn off the power supply and re

KMD-201AA KMD-201AWA - Hoshizaki

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