Hoshizaki DCM 300BAH(-OS) service manual

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7)Startup – Move the power switch to the "ON" position, then move the control switch to the "ICE" position to start the automatic icemaking process. Diagnosis: Check that CB "POWER" LED is on. If not, check for proper power supply voltage (115VAC) input to CT. If 115VAC is not present, check the breaker, power switch, and front panel safety switch. Next, check that the power protect relay is de‑energized and contacts between terminals #6 (BR wire) and #2 (BK wire) are closed. Check for proper control voltage (10.5VAC) output from CT to CB K4 connector pin #1 (BR wire) to CB K4 connector pin #2 (LBU wire). If 10.5VAC is not present and 10.5VAC 0.5A fuse is good, replace CT. If 10.5VAC is present and "POWER" LED is off, replace CB.

8)Fill Cycle – Reservoir is empty. LF/S and UF/S are open. WV energizes and fill cycle starts. LF/S closes. Nothing happens at this time. Reservoir continues to fill. UF/S closes. WCR energizes, closing low water safety circuit (WCR terminals #6 (GY wire) and #4 (O wire)) and de‑energizing WV. GM energizes. Diagnosis: If reservoir is empty and WV is off, confirm LF/S status. See "IV.E. Float Switch Check and Cleaning." Check that WV energizes and water fills the reservoir. If not, check that the water supply line shut-off valve is open, possible clogged water filters, and clogged WV screen. If LF/S

is open and WV is off, check for 24VAC at CB K2 connector pin #7 (R wire) to CB

K2 connector pin #8 (LBU wire). If 24VAC is not present and the 24VAC 1A fuse is good, replace CT. If 24VAC is present, check for 24VAC at K3 connector pin #3 (DBU wire) to a neutral (LBU wire). If 24VAC is not present, replace CB. If 24VAC is present, check for 24VAC at the control switch (R wire) to a neutral (LBU wire). If 24VAC is not present, make sure the control switch is in the "ICE" position. Replace the control switch if defective. If 24VAC is present, check for 24VAC at WCR terminal #1 (BR wire) to WCR terminal #5 (R wire). If 24VAC is present, WCR is energized or defective. If energized, check that UF/S is open. See "IV.E. Float Switch Check and Cleaning." If not energized, replace WCR. If 24VAC is not present, check WCR terminal #1 (BR wire) to a neutral (LBU wire). If 24VAC is present, check WV solenoid wire connections and continuity.

If WV is energized and refill exceeds FT with no water in the reservoir, check for DV leaking. If reservoir is full and overflowing check for open UF/S. See "IV.E. Float Switch

Check and Cleaning." If UF/S is closed, check that WCR energizes, de-energizing WV. If not, check for 24VAC at WCR terminal #7 (BK wire) to WCR terminal #8 (LBU wire). If 24VAC is present and WV does not de-energize, replace WCR. If WV de‑energizes and water continues to fill the reservoir, replace WV.

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Contents DCM-300BAH-OS Hoshizaki AMERICA, INC Contents Page Important Safety Information Page Specifications Icemaker DCM-300BAH-OSII. General Information Construction IcemakerIcemaking Unit Sequence of Operation Sequence Cycles and ShutdownShutdown & Restart Sequence Flow ChartCycle Steps 12-Hr. Drain CycleControl Board Control Board Layout DCM-PB Push Button Model Control BoardControl Board K5 Connector DCM-OS Opti-Serve Model Control BoardPower Switch Power Switch, Control Switch, and Dispense Mode SwitchLED Lights and Components Control Switch Dispense Mode SwitchPage Wiring Diagrams DCM-300BAH-OS Performance Data Diagnostic Procedure IV. Service DiagnosisIce Production Check Page Page Page Page Control Board Check 5VDC Output ChecksPage Opti-Serve Model ICE and AM LEDs are on K5 Pin #7 R wire Page Bin Control Check Float Switch Check and Cleaning Float Switch CheckFloat Switch Cleaning Startup Diagnostic ChartsNo Ice Production Fill CycleIce Purge Cycle ShutdownIce Dispense Opti-Serve Ice/Water DispenseIce Dispense Push Button Water Dispense Push Button3b. Ice Dispense Portion Opti-Serve OS Sensors3a. Ice Dispense Continuous 3c. Water DispenseRemoval and Replacement of Components Service for Refrigerant LinesBrazing Refrigerant RecoveryEvacuation and Recharge R-404A Important Notes for Component Replacement Evaporator Assembly Removal and Replacement of Extruding Head Upper Bearing Wear CheckRemoval and Replacement of Auger Removal and Replacement of EvaporatorPage 5b. Lower Housing Removal and Replacement of Gear Motor Dispense Auger and Agitator Dispense or Agitating MotorVI. Cleaning and Maintenance Cleaning and Sanitizing Instructions Water SystemSanitizing Solution Cleaning and Sanitizing Procedure Dispense ComponentsWater Dispense Nozzle Ice Dispense Spout Spout Cover Maintenance Schedule MaintenanceFrequency Area Task Preparing the Icemaker for Periods of Non-Use VII. Disposal

DCM 300BAH(-OS) specifications

The Hoshizaki DCM 300BAH(-OS) is a high-performance ice and water dispenser designed to meet the demands of various commercial environments. Known for its reliability and efficiency, this machine is widely used in restaurants, hotels, and catering services where a continuous supply of ice is essential.

One of the standout features of the DCM 300BAH(-OS) is its ability to produce crescent-shaped ice, which is favored in many settings for its hardness and slow-melting properties. This type of ice helps maintain the temperature of beverages longer without diluting them too quickly, making it ideal for mixed drinks and soft drinks alike.

Technology-wise, the Hoshizaki DCM 300BAH(-OS) integrates advanced refrigeration components that enhance energy efficiency. The machine is designed with a patented cooling system that reduces energy consumption while maintaining optimal ice production. Moreover, it is equipped with a highly efficient compressor that ensures quick recovery times even during peak usage.

One characteristic that sets this model apart is its space-saving design. With a footprint that allows for easy placement in tight quarters, it is particularly suited for establishments with limited counter space. The sleek and contemporary exterior also means it complements a variety of decor styles, making it a versatile addition to any commercial kitchen or bar.

The unit boasts a user-friendly interface, with easy-to-read indicators for ice and water levels, allowing staff to manage operations seamlessly. Additionally, the DCM 300BAH(-OS) features a self-cleaning cycle, which automates the sanitation process to ensure the utmost hygiene standards are maintained. This feature not only saves time but also enhances the longevity of the unit by reducing wear and tear.

Its durable construction is another strong point. Built from high-quality stainless steel, the DCM 300BAH(-OS) is resistant to corrosion and wear, ensuring it can withstand the rigors of daily use. Furthermore, Hoshizaki products are renowned for their reliability, and this model upholds that reputation, providing consistent performance with minimal downtime.

In summary, the Hoshizaki DCM 300BAH(-OS) stands out for its efficient ice production, innovative technology, space-saving design, user-friendly features, and robust durability, making it an ideal choice for any business that requires a reliable ice and water dispensing solution.
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