Hoshizaki 73183 Refrigerator Sequence Flow Chart, Charts, a Refrigerator, Startup/Cool Down

Refrigerator Sequence Flow Chart

	1. Startup/Cool Down				2. Cool Down Achieved		4. Defrost			5. Defrost Termination
			3. Cool Down		Restart	CTh warms		DTh cools to		DTh warms to
					CTh cools
Slight					to 3°F (1.7°C)	to 3°F (1.7°C)		8.6°F (-13°C)		40°F (4.4°C)
Delay at					below setpoint.	above				2-min. temperature display
Startup					Factory default	setpoint				delay timer starts
			CTh in control		36°F (2°C)				DTh in control
		2-min. Comp on		2-min. Comp off
Power on		timer starts		timer starts

a) Refrigerator	2. Sequence Flow
	Charts

14

EvapFM energized	Comp energized	EvapFM energized
MH energized	ConFM energized	MH energized
	EvapFM energized	Comp de-energized
	MH energized	ConFM de-energized

EvapFM energized	Comp energized
MH energized	ConFM energized
Comp de-energized	EvapFM energized
ConFM de-energized	MH energized

Legend: Comp-compressorConFM-condenser fan motor CTh-cabinet thermistor DTh-defrost thermistor EvapFM-evaporator fan motor MH-mullion heater

Note:

a)EvapFM de-energizes when door is opened on FS and when upper door is opened on HS.

b)2-minute minimum Comp on timer starts when Comp energizes.

c)2-minute minimum Comp off timer starts when Comp de-energizes.

d)2-minute temperature display delay timer starts when defrost termination temperature is met.

e)20-minute minimum defrost time.

f)1-hour maximum defrost time.