8)Drain Cycle – "FLUSH" (drain) LED is on: 12-hr. DCT terminates or CS is moved to "DRAIN" position. 150-sec. shutdown sequence starts. 90 seconds later, Comp de‑energizes and Comp LED turns off. 60 seconds after Comp de-energizes, GM de‑energizes and GM LED turns off. Drain cycle starts. "FLUSH" LED turns on and DV energizes. DV de-energizes after 20 minutes when drain cycle is initiated by 12-hr. DCT. When the drain cycle is initiated by CS (manual drain), DV de-energizes when CS is moved to "OFF" position or "ICE" position.

Push Button Model: "FLUSH" (drain) LED is on. Confirm 24VAC at CB K2 connector pin #8 (LBU wire) (12-hr. DCT) to CB K4 connector pin #2 (LBU wire). If 24VAC is not present, confirm 24VAC at CB K2 connector pin #7 (R wire) to CB K4 connector pin #2 (LBU wire). If 24VAC is present on CB K4 connector pin #7 (R wire) and not on pin #8 (LBU wire), replace CB. If 24VAC is present, DV energizes and allows water from the evaporator and reservoir to drain for 20 minutes.

Opti-Serve Model: "FLUSH" (drain) LED is on. Confirm 24VAC at CB K2 connector pin #10 (LBU wire) (12-hr. DCT) to CB K4 connector pin #2 (LBU wire). If 24VAC is not present and "FLUSH" LED is on (CS in the "ICE" position), replace CB. If 24VAC is present, DV energizes and allows water from the evaporator and reservoir to drain for 20 minutes.

Manual Drain: Move CS to the "DRAIN" position. Confirm 24VAC at CB K3 connector pin #3 (DBU wire) to CB K4 connector pin #2 (LBU wire). If 24VAC is not present, replace CB. If 24VAC is present, check CS (LBU wire) to CB K4 connector pin

#2 (LBU wire). If 24VAC is not present, replace CS. If 24VAC is present, DV energizes and allows water from the evaporator and reservoir to drain.

9)Shutdown – When BC actuator paddle is activated, BC proximity switch opens, 5VDC is interrupted at CB K4 connector pin #3 (GY wire) and #4 (V wire). 150-sec. shutdown sequence starts. 90 seconds after BC opens, Comp de-energizes, 60 seconds later, GM de‑energizes. If 5VDC is present from CB K4 connector pin #3 (GY wire) to CB connector pin #4 (V wire), and Comp or GM does not de-energize, replace CB.

Legend: AM–agitating motor; BC–bin control; CB–control board; Comp–compressor; CS–control switch; CT–control transformer; DCT–drain cycle timer (12-hr. timer); DispWV–dispense water valve; DM–dispense motor; DMS–dispense mode switch ("CONTINUOUS," or "PORTION"); DS–dispense solenoid; DVT–drain valve timer (20-min. timer); FM–fan motor; GM–gear motor; GMPR–gear motor protect relay; LF/S–lower float switch; UF/S–upper float switch; WCR–water control relay; WV–inlet water valve

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Hoshizaki DCM 300BAH(-OS) service manual
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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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