Hoshizaki AM-50BAE Diagnosis, A. Sequence of Operation Flow Chart, Initial Freeze Cycle

AM-50BAE Series Sequence Flow Chart

Cycle Steps

1. Initial

2. Initial Freeze Cycle

3. Normal Harvest Cycle

4. Normal Freeze Cycle

Harvest

• WV continues for 52 sec. during initial freeze.

• WV time: 102 sec. or the

• 3-min. FT resets if temperature rises above

Cycle

• 3-min. FT resets if temperature rises above

length of harvest, whichever

27°F (-3°C) during 3-min. FT.

27°F (-3°C) during 3-min. FT.

is shorter.

50-sec.

Thermistor

3-min. FT

5-min. FTT

Thermistor

50-sec.

Thermistor

3-min. FT

5-min. FTT

HT

in control

in control

in control

in control

HT in

in control

in control

in control

102-sec.

102-sec.

control

52-sec.

WVT

WVT

Startup

WV de-energized

Thermistor drops to

If thermistor stays

Thermistor temperature

Thermistor drops to

If thermistor stays

27°F (-3°C)

below 27°F (-3°C),

reaches 45°F (7°C)

27°F (-3°C)

below 27°F (-3°C),

(6.8 kΩ or more).

3-min. freeze timer

(4.5 kΩ or less).

(6.8 kΩ or more).

3-min. freeze timer

3-min. FT starts.

terminates and

50 sec. HT starts.

3-min. FT starts.

terminates and

9

5-min FTT starts.

5-min FTT starts.

Otherwise, 3-min. FT

Otherwise, 3-min. FT

BCH energized

BCH continues

restarts.

BCH continues

BCH continues

restarts.

Comp energized

Comp continues

Comp continues

Comp continues

HGV energized

FM energized

FM de-energized

FM energized

WV energized

PM energized

PM de-energized

PM energized

HGV de-energized

HGV energized

HGV de-energized

WV energized

WV de-energized

A. Sequence of Operation Flow Chart	II. Sequence of Operation and Service
	Diagnosis

Shutdown and Restart		1. Bin Full		2. Icemaker Off		3. Ice Level Lowered
		Within 10 sec. after ice		All components		No ice touching
		contacts thermostatic		de-energized.		thermostatic bulb.
		bulb, appliance shuts				Icemaker starts at
		down.				"1. Initial Harvest Cycle."
BC Operation							To 1 above
	Ice contacts		BC open		BC closed
	thermostatic bulb		All components

de‑energized except BCH and DP

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

The "WASH" position on the control switch is used when cleaning and sanitizing the icemaker. When in the "WASH" position, power is supplied to the pump motor and fan motor. The cleaner and sanitizer flow over the evaporator plate assembly.

Legend:

BC–bin control

BCH–bin control heater Comp–compressor DP–drain pump (optional) FM–fan motor FT–freeze timer FTT–freeze termination timer HGV–hot gas valve HT–harvest timer PM–pump motor WV–inlet water valve WVT–inlet water valve timer