Scotsman SCE275 Bedienungsanleitung PDF herunterladen (Seite 19)

SCE275

January 2003

Page 19

Technicians Only: Harvest Cycle Operational Sequence

Harvest

The (air cooled) fans are off.

The water valve opens and fills the reservoir to the

Full level.

The water pump shuts off, it will restart in less than

a minute.

The AutoIQ Controller checks how long it takes to

fill the reservoir and if it was too much time, the

machine Shuts Down on Water Error.

Note: The machine will automatically attempt to

restart after shutting down because of a lack of

water. The time between restarts is about 20

minutes.

The inlet water valve will stay on and open for a

predetermined fraction of the time it took to fill the

reservoir. This overflows and rinses the reservoir

water.

During the Harvest Cycle, ice will be falling from

the evaporators and between the bin control’s

electric eyes. The harvest cycle’s length is based

on the actual time from the start of the prior harvest

cycle until the last cube fell, plus an added amount

of time as a margin.

The maximum harvest cycle time allowed is 8

minutes. Harvest time is varied by the AutoIQ

Controller based on the prior harvest cycle’s

length.

If no cubes fall (or are sensed) by the end of

Maximum Harvest Time, the controller senses a

refrigeration error. If the next cycle also produces a

refrigeration error, the machine Shuts Down.

Note: The last Harvest cycle before shutting off

on Bin Full will be longer than normal (4-5

minutes).

During a harvest cycle, the water pump will shut off

when the bin sensors indicate that the bin is full.

Note: The machine will not restart for 4 minutes

after switching off on Bin Full, unless the freeze

button is pressed.

Diagnostic Lights:

There are two diagnostic lights, one to indicate a

water problem, and the other to indicate a

refrigeration problem.

If a Diagnostic

Light:

Water Light Refrigeration

Light

Blinks once and

repeats

Water pump did

not start

Very long ice

harvest

Blinks twice

and repeats

Lack of water

fill

No harvest of

ice

Blinks three

times and

repeats

not used High discharge

temperature

Is On all the

time

Water valve

leaking thru

rapidly

Check for low

discharge

temperature or

long freeze

cycle

Both On all the

time

Check for thermistor set

unplugged or failed

Restarts:

The controller will attempt to restart the ice

machine after the first and second shut downs

because of a water or refrigeration error.

There will be a 50 minute interval between restarts.

There are two exceptions to this:

1. Lack of water. The controller will try to refill the

reservoir about every 20 minutes after shutting

down for lack of water.

2. Harvest errors: The controller must sense two

consecutive harvest errors in order to stop the

machine. The controller will try to operate the

machine two additional times before a manual

reset is needed.

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