NME454, 654 & FME504, 804

ELECTRICAL SEQUENCE:

There are 7 indicator lights on the control board:

￿WTR-OK (Water OK). Green. Normal =

Glowing. Glows when there is water in the reservoir.

￿PWR-OK (Power OK). Green. Normal =

Glowing. Glows when the control board has power and is functional.

￿Service. Red. Normally Off.

￿Freeze. Red. Normally glowing when making ice.

￿Bin Full. Red. Normally Off when making ice.

￿LED1. White. Located next to the board’s Compressor Relay. Normally Glowing when making ice.

￿LED3. White. Located next to the board’s Auger

Motor Relay. Normally Glowing when making ice.

If the machine is switched off at the mode switch, but is otherwise ready to go, switching the mode switch to ON does the following:

￿The PWR-OK light glows.

￿If there is water in the reservoir the WTR-OK light glows.

￿After 10 seconds the Freeze, LED1 and LED3 lights glow and the machine starts up.

Start Up:

￿The compressor relay and auger motor relay become energized, connecting power to the windings of the auger motor and contactor coil.

￿The contactor is energized, connecting power to the compressor, and the compressor starts.

￿As ice is made it passes between the ice level sensors but because it is not a continuous stream it only interupts the sensor’s infrared beam momentarily. The bin full light remains off and the machine stays on until ice builds up in the bin and blocks the path between the sensors for 6 seconds or longer. When that occurs the bin full light glows and the machine shuts down.

Shut Down:

￿The compressor relay opens, LED1 goes out.

￿The compressor contactor opens

￿The compressor stops

￿The auger motor stays on for 1 more minute, clearing out ice in the evaporator, and then

￿The auger motor relay opens, LED3 goes out and the auger motor stops.

The compressor will not restart until 2 minutes or more have passed after the last shut down.

If the path between the ice level sensors remains clear for more than 10 seconds the ice machine will restart.

Control Board Protection Devices

￿When the water level in the reservoir falls below the water level sensor’s tip, the WTR-OK light goes out and the machine shuts down. When water refills the reservoir the WTR-OK light glows and the machine starts up again.

￿If the auger drive motor current becomes excessive the compressor and auger drive motor will be switched Off and the Service light will blink. The control board will restart the auger drive motor in 4 minutes. If during the first 60 seconds after restart the auger motor current stays within limits, the compressor is restarted and the machine returns to normal operation. If the auger motor’s current is excessive within 60 seconds after the restart, the process will be repeated once more. If during that try the current is still excessive the machine shuts down and must be manually reset. The service

light will then be glowing continuously.

To Reset: Disconnect and reconnect electrical power to the ice machine.

Other Protection Devices:

￿If the high pressure cut out switch opens the machine will stop immediately. It will automatically reset when the pressure falls below its cut in point.

￿If the low pressure cut out switch opens the machine will stop immediately. It will automatically reset when the pressure rises above its cut in point.

￿The mode (on - off) switch is the manual control for the complete machine, but it is not a service disconnect.

January 2007

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Scotsman Ice NME654, NME454, FME804, FME504 manual Electrical Sequence, Start Up, Shut Down, Control Board Protection Devices
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FME504, FME804, NME654, NME454 specifications

Scotsman Ice Systems is known for its high-quality ice machines, and models such as the NME454, NME654, FME804, and FME504 are no exceptions. Designed with both performance and efficiency in mind, these machines cater to various business needs, from restaurants to convenience stores.

The NME454 and NME654 units are renowned for their compact design, making them ideal for establishments with limited space. Despite their smaller size, these machines do not compromise on ice production capacity. The NME454 can produce up to 430 pounds of ice per day, while the NME654 boasts an impressive output of up to 600 pounds. Both models utilize Scotsman's signature innovative technology to ensure consistent ice quality, primarily in the form of nugget ice, which is favored for its ability to cool beverages quickly.

In contrast, the FME804 and FME504 are larger-capacity machines that cater to high-volume requirements. The FME804 can produce around 800 pounds of ice daily, making it suitable for busy restaurants or bars. The FME504, while slightly smaller, still offers impressive production capabilities of up to 500 pounds per day. These machines incorporate advanced features such as the AquaArmor protective layer, which inhibits bacterial growth, ensuring that the ice produced is not only abundant but also hygienic.

All four models utilize an innovative air-cooled design that enhances energy efficiency and reduces operational costs. The easy-to-use control panel allows for straightforward operation, and maintenance is streamlined thanks to easily accessible components. Additionally, the quiet operation of the machines ensures that they can be used in front-of-house areas without distracting customers.

In terms of construction, Scotsman ice machines are built to last with corrosion-resistant materials, ensuring longevity in demanding environments. With simple installation processes and compatibility with various environments, including indoor and outdoor settings, these units provide adaptability for any business scenario.

Overall, Scotsman’s NME454, NME654, FME804, and FME504 ice machines combine robust performance with innovative technology, catering efficiently to diverse ice production needs while maintaining high standards of hygiene and reliability.
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