Hoshizaki KM-201BWH, KM-260BAH, KM-201BAH, KM-260BWH service manual

starts after the thermistor temperature reaches 36°F (2°C). After this period, the freeze cycle operation is transferred to the float switch for freeze termination. During the first 5 minutes of freeze, confirm that the evaporator temperature drops. After the minimum freeze period, disconnect the float switch at the 2-pin connector attached to the red wires. The unit should immediately switch to the pump-out cycle. Diagnosis: If the evaporator is not cold, check to see if the hot gas valve is still open or if the expansion valve is not opening properly, if the water valve is continuing to fill the reservoir, if there are improper unit pressures or an inoperative compressor. If the unit remains in freeze with the float switch removed, replace the board.

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)Pump-Out Cycle – The compressor remains energized, the hot gas valve energizes, the fan motor de-energizes. The drain valve and pump motor energize, allowing water to drain from the tank for 10 seconds. This removes contaminants from the water tank. Diagnosis: If the drain valve does not open, check the circuit. Check for proper voltage. If water does not drain out, check and clean the tubing at the drain valve and then check and clean the valve assembly.

7)Normal Harvest Cycle – same as the initial harvest cycle – Return to step 4.

8)Shutdown – See “II. 5. [b] BIN CONTROL CHECK PROCEDURE”. Note that after a bin-control initiated shutdown, there is a 90 second minimum off time.

Note: Unit continues to cycle until bin control is satisfied or power is turned off. (The pump-out cycle can be adjusted to occur every cycle, or every 2, 5, or 10 cycles. The factory default is every 10 cycles.) The unit always restarts at the 1 minute fill cycle.

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