Hoshizaki dcm-75ibah LED Lights and Audible Alarm Safeties, Icemaking Sequence Sequence Step

B. LED Lights and Audible Alarm Safeties

The "POWER" LED indicates proper control voltage and will remain on unless a control voltage problem occurs. For further details, see "II. Sequence of Operation and Service Diagnosis."

Icemaking Sequence

Sequence Step		LED	Energized
			Components		Min.		Max.
Fill Cycle		WTRIN	WV		-		On until UFS closes. Alarm sounds
							after 90 sec.
Ice Purge Cycle		GM	GM, FM		5 min.		5 min.
Freeze Cycle		GM, WTRIN* (refill),	GM, Comp,		-		*On until UFS closes. Alarm
(with refill)		COMP	FM, WV*				sounds after 90 sec.
			(refill)
Drain Cycle		FLUSH (Drain)	DV		2 sec.		10 min.
			Dispensing Sequence
Sequence Step		LED	Energized		Time LEDs are on		**Dispense Mode Switch
			Components				Continuous	Portion
Ice Dispense		ICE, AM*	IDS**, IDM**,	*AM energizes			60 sec. per	Adjustable
Activation			AM*		.6 sec. every 12		activation	between 0.2 sec.
					sec. of cumulative			and 20 sec.
					dispense time
Dispense Water		WTRDP	DispWV
Valve Activation
The built-in		alarm safeties shut down the appliance.
No. of Beeps		Type of Alarm					Reset Options
(every 5 sec.)
1	Low Water Safety					Automatic reset once water supply is restored
	UFS open > 90 seconds after WV energized.					and UFS closes.
2	Control Switch					Automatic reset once the control switch is
	In "DRAIN" position longer than 15 minutes.					moved to the "ICE" position.
3	High-Pressure Switch					Automatic reset once pressure drops
	First and second activation in 1 hour.					below the high pressure threshold and the
						high‑pressure switch closes.
4	High-Pressure Switch					Call for service. To avoid possible catastrophic
	Third activation in 1 hour.					failure, it is recommended to leave the
						appliance off until this alarm is resolved.
						Manual reset. Turn power off and on again.
5	Freeze Timer					Manual reset. Turn power off and on again.
	WV off > 30 minutes since last WV activation.
6	Low Voltage					"POWER OK" LED turns off if voltage
	(92Vac ±5% or less)					protection operates.
7	High Voltage					The control voltage safeties automatically
	(147Vac ±5% or more)					reset when voltage is corrected.
8	Gear Motor					Manual reset. Turn power off and on again.
	GMPR contacts fail to close.
9	Infrared Sensor (S1 dip switch 7)					Manual reset. Turn power off and on again.
	(Not used on this model)

Legend: AM–agitating motors, Comp–compressor; DispWV–dispense water valve; DV–drain valve; EH–evaporator heater; FM–fan motor; GM–gear motor; GMPR–gear motor protect relay; IDM–ice dispensing motor; IDS–ice dispensing shutter solenoid; UFS–upper float switch; WV–inlet water valve

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