Hoshizaki AM-50BAE-ADDS Ice Maker User Manual


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9
II. Sequence of Operation and Service Diagnosis
A. Sequence of Operation Flow Chart
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 ow 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
3-min. FT
incontrol
AM-50BAE Series Sequence Flow Chart
1. Initial
Harvest
Cycle
Cycle Steps
2. Initial Freeze Cycle
• WV continues for 52 sec. during initial freeze.
• 3-min. FT resets if temperature rises above
27°F (-3°C) during 3-min. FT.
Thermistor
in control
3. Normal Harvest Cycle
• WV time: 102 sec. or the
length of harvest, whichever
is shorter.
BCH energized
Comp energized
HGV energized
WV energized
Thermistor drops to
27°F (-3°C)
(6.8 kΩ or more).
3-min. FT starts.
BCH continues
Comp continues
FM de-energized
PM de-energized
HGV energized
WV energized
Startup
Thermistor
in control
BCH continues
Comp continues
FM energized
PM energized
HGV de-energized
50-sec.
HT
Thermistor temperature
reaches 45°F (7°C)
(4.5 kΩ or less).
50 sec. HT starts.
50-sec.
HT in
control
1. Bin Full
Within 10 sec. after ice
contacts thermostatic
bulb, appliance shuts
down.
Shutdown andRestart
BC Operation
Ice contacts
thermostatic bulb
BC open
All components
de-energized except
BCH and DP
2. Icemaker Off
All components
de-energized.
3. Ice Level Lowered
No ice touching
thermostatic bulb.
Icemaker starts at
"1. Initial Harvest Cycle."
To 1 above
BC closed
4. Normal Freeze Cycle
• 3-min. FT resets if temperature rises above
27°F (-3°C) during 3-min. FT.
5-min. FTT
incontrol
If thermistor stays
below 27°F (-3°C),
3-min. freeze timer
terminates and
5-min FTT starts.
Otherwise, 3-min. FT
restarts.
BCH continues
Comp continues
FM energized
PM energized
HGV de-energized
WV de-energized
WV de-energized
102-sec.
WVT
52-sec.
3-min. FT
incontrol
Thermistor
in control
5-min. FTT
incontrol
Thermistor drops to
27°F (-3°C)
(6.8 kΩ or more).
3-min. FT starts.
If thermistor stays
below 27°F (-3°C),
3-min. freeze timer
terminates and
5-min FTT starts.
Otherwise, 3-min. FT
restarts.
102-sec.
WVT
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