Hoshizaki DCM 300BAH(-OS) service manual Sequence Flow Chart, Cycle Steps, Shutdown & Restart

"DCM-PB" and "DCM-OS" Control Board Sequence Flow Chart DCM-300BAH(-OS)

2.

				4. 12-Hr. Drain Cycle
			DV opens for 20 min. every 12 hr.
			See "12-Hr. Drain Cycle" below.
									FT Exceeded
Cycle Steps	1. Fill Cycle	2. Ice Purge Cycle			3. Freeze Cycle				• FT exceeded: CB starts
										shutdown sequence.
						• FT 90 sec. starts when LF/S opens
									• WV energized continuously.
						and terminated when UF/S closes.
									• When UF/S closes, 2. Ice
							Refill			Purge Cycle starts.
										Shutdown Sequence
Startup begins here			60 sec.				Maximum 90 sec.				60 sec.
								90
									sec
										.FT
									exceeded

WV continues until UF/S closes

Sequence Flow Chart

	WV energized	LF/S closed	GM continues	UF/S open	LF/S closed	UF/S open	WV continues
	UF/S open	UF/S closed	Comp energized	LF/S open	UF/S closed	GM continues	GM de-energizes
		GM energized	FM energized	FT starts (90-sec.)	FT terminated	WV continues
		WV de-energized		Comp continues	Comp continues	Comp de-energized
				FM continues	FM continues	FM de-energized
11				GM continues	GM continues
				WV energized	WV de-energized

Shutdown & Restart

1. Bin Full

2. Ice Purge Cycle

3. Icemaker Off

4. Icemaker

150-sec. Shutdown Sequence

Restart

90 sec.

60 sec.

to "1. Fill Cycle" above

Legend:

BC-bin control

BC open

GM continues

GM de-energized BC closed

CB-control board

Comp-compressor

Comp continues Comp de-energized

DCT-drain cycle timer (12-hr. timer)

FM continues

FM de-energized

DV-drain valve

GM continues

DVT-drain valve timer (20-min. timer)

12-Hr. Drain Cycle

1. Ice Purge Cycle

2. Drain

3. Icemaker

FM-fan motor

FT-fill timer (90-sec. low water safety timer)

Restart

GM-gear motor

60 sec.

to "1. Fill Cycle" above

LF/S-lower float switch

UF/S-upper float switch

DCT terminates

DVT terminates

DV energizes

WV-inlet water valve

DVT starts

GM de-energized

GM continues

Components Energized when the Control Switch is in the "DRAIN" Position

Comp de-energizes

The "DRAIN" position on the control switch is used when cleaning and sanitizing the icemaker. This allows

FM de-energizes

cleaner and sanitizer to drain from the reservoir and evaporator assembly. When switching to the "DRAIN"

position during the freeze cycle, the drain valve does not energize until the 150-sec. shutdown sequence

terminates

(Shutdown & Restart).

Note: To bypass the 150-sec. shutdown sequence, move the power switch to the "OFF" position, place the

control switch in the "DRAIN" position, then move the power switch back to the "ON" position.