Hoshizaki DCM 300BAH(-OS) service manual

if defective. If 24VAC is present, check for 24VAC at GMPR terminal #2 (P wire) to a neutral (LBU wire). If 24VAC is not present, check GMPR continuity between terminals #2 (P wire) and #6 (LBU wire). If open, replace GMPR. Next, check for 24VAC at DV. If 24VAC is present and DV does not energize, check DV solenoid continuity.

13)Shutdown – Bin fills with ice and activates BC actuator paddle. 150-sec. shutdown sequence begins. 90 sec. after BC opens, Comp and FM de-energize, AM energizes for 0.6 sec., 60 sec. later, GM de-energizes. Diagnosis: Check that BC actuator paddle is activated and not sticking. Check BC proximity switch continuity to confirm BC proximity switch is open. If BC actuator is engaged and BC proximity switch is closed, replace BC proximity switch. If BC proximity switch is open and Comp, FM, and GM do not de‑energize, replace CB. See "IV.C. Control Board Check Procedure."

Legend: AM–agitating motor; BC–bin control; CB–control board; Comp–compressor; CT–control transformer; DCT–drain cycle timer (12-hr. timer); DV–drain valve; DVT–drain valve timer (20-min. timer); FM–fan motor; FT–fill timer (90‑sec.low water safety); 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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