•Icemaking Control Circuit: The icemaking control circuit consists of WCR, CS, and

BC. The icemaking control circuit activates once UF/S closes. Once CB reads a closed circuit through WCR, CS, and BC, CB then starts the 60-sec. ice purge cycle (GM operation). Once UF/S closes, WCR energizes, closing contacts between WCR terminals #4 (GY wire) and #6 (O wire). CS must be in the "ICE" position (O wires). BC proximity switch must be closed (O and V wires) to complete the icemaking circuit between CB K4 connector pin #3 (GY wire) and #4 (V wire). Diagnosis: Confirm UF/S has closed and WCR energizes. Next, check for 5VDC from CB K4 connector pin

#3 (GY wire) and CB K4 connector pin #4 (V wire) to CB K3 connector pin #1 (open). If 5VDC is not present on CB K4 connector pin #3 (GY wire) or pin #4 (V wire), replace CB. If 5VDC is present on one and not the other, check continuity on WCR terminals #4 and #6, CS, and BC.

•Freeze Protect Circuit (GMPR): Once 60-sec. ice purge cycle starts, GM and

GMPR energize, closing GMPR pins #3 (BR wire) and #5 (DBU wire). CB circuit

K2 connector pin #1 (DBU wire) and #2 (BR wire) is now closed. Once 60-sec. ice purge timer terminates, CB energizes Comp. If this circuit is open, Comp cannot energize. Diagnosis: Check for 5VDC at CB K2 connector pin #1 (DBU wire) and CB K2 connector pin #2 (BR wire) to CB K3 connector pin #1 (open). If 5VDC is not present on either pin, replace CB. If 5VDC is present on one and not the other, confirm GMPR is energized and terminals #3 and #5 contacts are closed. If 5VDC is present on both, once 60-sec. ice purge timer terminates, Comp and FM start. If not, replace CB.

•Ice Dispense Controls:

a)Push Button Model – "DM" and "AM" LEDs are on: Ice Dispense Switch, Dispense Mode Switch ("CONTINUOUS" or "PORTION")–When the ice dispense mode switch is pressed, "DM" LED is on. Circuit is closed between CB K4 connector pin #6 (BK wire) and #8 (BK wire) to #7 (GY wire) or #5 (P wire) depending on dispense mode switch ("CONTINUOUS" or "PORTION"). Diagnosis: Check for 5VDC from CB

K4 connector pin #6 (BK wire) or pin #8 (BK wire) to CB K3 connector pin #1 (open). If 5VDC is not present, replace CB. If 5VDC is present, press and hold the ice dispense button. DS and DM should energize. If not, check for 115VAC at CB K2 connector pin #6 (LBU wire) to a neutral (W wire). If 115VAC is not present, check as outlined below. If 115VAC is present, check DS, DM winding, and DM auger for binding.

(1)"CONTINUOUS" Mode: Engage the ice dispense button, then check for 5VDC from CB K4 connector to pin #5 (P wire) to CB K3 connector pin #1 (open). If 5VDC is not present, check ice dispense switch and DMS continuity.

(2)"PORTION" Mode: Engage the ice dispense button, then check for 5VDC from CB K4 connector pin #7 (GY wire) to CB K3 connector pin #1 (open). If 5VDC is not present, check the ice dispense switch and DMS continuity.

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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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