Hoshizaki M029-897 B. Sequence of Operation, Startup Cycle, Harvest Cycle, Freeze Cycle

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B. Sequence of Operation

1. Startup Cycle

When power supply is turned on, "on" appears on CB display and HGV energizes. 30 sec. later, harvest cycle starts.

•If the "RESET" button is pressed during 30-sec. startup cycle time, startup cycle ends immediately and harvest cycle starts.

2.Harvest Cycle

HGV continues. Comp and AMD energize. WV energizes as listed in table below.

		CB	Initial Harvest	Initial Harvest after Bin Control		Normal Harvest
	Note	CB	after Power On	Initiated Restart		Normal Harvest
	Note	Setting	after Power On	Initiated Restart
		Setting	All WT	WT>48°F (9°C)	WT≤48°F (9°C)	WT>48°F (9°C)	WT≤48°F (9°C)
			All WT	WT>48°F (9°C)	WT≤48°F (9°C)	WT>48°F (9°C)	WT≤48°F (9°C)
	WV Delay	NA	20 sec.	0 sec.	0 sec.	20 sec.	20 sec.
	WV Time after	10, 11	95 sec.	10 sec.	95 sec.	30 sec.	95 sec.
	WV Delay			(CB Setting NA)
	WV Time	NA	10 sec.	0 sec.	10 sec.	0 sec.	10 sec.
	when
	ET≥41°F
	(5°C)
	(CB Setting 1)

Note: ET temperature is recorded 30 seconds after PM energizes in the preceding freeze cycle. Water temperature correction value (CB Setting 13) is added to ET temperature and this is used as WT value.

If CBT≤81°F (27°C) (CB Setting 74) at beginning of harvest cycle, HGV repeatedly energizes 40 sec./de-energizes 40 sec. If CBT≥118°F (48°C) (CB Setting 34) at beginning of harvest cycle, FM operates continuously in harvest cycle.

When ET reaches harvest cycle termination temperature (CB Setting 1) of 41°F (5°C) , HGV de-energizes, FM and AMU energize. Comp continues. WV energizes as listed in table above. Harvest cycle is complete when actuator motor PS indicates water tank is fully closed.

3. Freeze Cycle

Comp and FM continue. WV energizes for total time of WV Time 1 and WV Time 2 listed in table below. PM energizes after PM delay listed in table below.

		CB	Initial Freeze	Initial Freeze after Bin Control	Normal Freeze
	Note	CB	after Power On	Initiated Restart	Normal Freeze
	Note	Setting	after Power On	Initiated Restart
		Setting	All WT	All WT	All WT
			All WT	All WT	All WT
	PD	12	30 sec. × 2	30 sec. × 2	30 sec.
	WV Time 1
	and PM Delay
	PD	15	22 sec. × 2	22 sec. × 2	22 sec.
	WV Time 2
	FD	12	60 sec.	60 sec.	60 sec.
	WV Time 1
	and PM Delay
	FD	15	44 sec.	44 sec.	44 sec.
	WV Time 2

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Contents Stackable Square Cuber Model IM-500SAA HoshizakiHoshizaki America, IncPhone 1-800-233-1940 770 Fax Complete and detailed explanation of the problem618 Highway 74 South Peachtree City, GA Attn Hoshizaki Technical Support DepartmentCONTENTS serious injury Important Safety InformationIndicates a situation which could result in damage to the appliance or propertyWARNING, continued I. Construction and Water/Refrigeration Circuit Diagram A. Construction1. Air-Cooled Model SAA Water Tank B. Water/Refrigeration Circuit DiagramA. Sequence of Operation Flow Chart II. Sequence of Operation and Service DiagnosisShutdown and Restart Sequence Flow Chart IM Control Board1. Startup Cycle B. Sequence of Operation2. Harvest Cycle 3. Freeze Cycle4. Shutdown No Ice Production - Possible Cause C. Service Diagnosis TableLong Harvest Cycle Low Ice Production - Possible CauseLong Freeze Cycle Slab Does Not Break Into Separate Cubes - Possible CauseCloudy Cubes - Possible Cause 1. Bin Control Check D. Bin Control Check and Cleaning2. Bin Control Cleaning E. Evaporator Thermistor Check B. Control Board III. Controls and Adjustments A. Control Switch1. Control Board Layout IM Control BoardPart Number P01873-01 Version 1.3A or Later 1. RESET Button 2. SERVICE 1 and SERVICE 2 ButtonsC. Control Buttons D. Control Board Settings water supply time 1 CB Setting 12 timer terminates Freeze Cycle Water Supply Time 1 Partial Drain CBFreeze Cycle Water Supply Time 2 Partial Drain CB DO NOT ADJUST 2. Use the SERVICE 1 and SERVICE 2 buttons to move through the list E. Control Board Information Display3. Press the RESET button to view the item’s value 4. Press the RESET button to return to listFreeze cycles interrupted by bin control shutdown example, 655,350 cycles1.0A, displays as follows F. Control Board Model Code Setting 1. Control Board Replacement2. Checking or Changing the Control Board Model Code Page G. Error Codes 1. Dimple Diameter H. Quick Adjustmentsa To increase dimple diameter b To decrease dimple diameter2. Ice Clarity Normal PositionDrain Position IV. Refrigeration Circuit and Component Service Information A. Refrigeration Circuit Service Information1. Refrigerant Recovery 3. Evacuation and Recharge R-404A 2. BrazingB. Component Service Information Assembly Refer to illustration for assemblyJ. Pump Motor Assembly G. Water Pan AssemblyV. Maintenance VI. Preparing the Icemaker for Periods of Non-Use 1. Remove the water from the icemaker water supply line2. Drain the water tank VII. Disposal A. Specification Data VIII. Technical Information1. IM-500SAA B. Performance Data 1. IM-500SAA C. Wiring Diagram