Hoshizaki FS-1022MLH-C service manual LED Lights and Audible Alarm Safeties, Sequence Step

2. LED Lights and Audible Alarm Safeties

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

Sequence Step	LED	Energized
		Components	Min.	Max.
Fill Cycle	WTRIN	WV	-	-
Ice Purge Cycle	GM	GM, EH	5 min.	5 min.
Freeze Cycle (with refill)	GM, COMP,	GM, EH, PDS, Comp,	-	*On until UF/S closes.
	WTRIN* (refill),	FMR,		Alarm sounds after
		WV* (refill)		90 sec.
1-in-1 Drain Cycle	FLUSH (Drain)	DV	2 sec.	2 sec.
(S1 dip switch 4 off)	GM, COMP	Comp, GM, EH, PDS,
	(only if IS not	FMR (only if IS not
	satisfied)	satisfied)
1-in-12 Drain Cycle	FLUSH (Drain)	DV	10 min.	10 min.
(S1 dip switch 4 on)

The built-in alarm safeties shut down the unit.

No. of Beeps	Type of Alarm	Reset Options
(every 5 sec.)
1	Low Water Safety	Automatic reset once water supply is restored
	UF/S open > 90 seconds after WV energized.	and UF/S 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: N/A on this model.	See "III.B.2. SRC-10H" for high-pressure
4	High-Pressure Switch: N/A on this model.	switch operation.
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.
	MBC actuator paddle engaged.

Legend: DV–drain valve; EH–evaporator heater; FMR–fan motor‑remote; GM–gear motor; IS–infrared sensor bin control; MBC–mechanical backup bin control; PDS-pump‑down solenoid valve; WV–inlet water valve

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