Stirling SU780XLE User manual

Operating Manual
11.18.19
SU780XLE -86˚C
Ultra-Low Storage Freezer
6000 Poston Rd Athens, Ohio 45701, USA t: 740.274.7900 / 855.274.7900 f: 740.274.7901 www.stirlingultracold.com

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SU780XLE Quick Guide
Initial Setup
1. Unpack freezer unit and included components, ensure all packaging material has been
removed from around the fan inlet and outlet holes.
2. Adjust the leveling feet (wrench included) to secure the freezer in place.
3. Plug AC power cord into the main power socket at the back of the unit and then into an
electrical outlet.
4. Switch AC power to the “On” position.
5. Notice: Ensure the access port stopper or sealant is in place. Remove factory tape at the port
stopper prior to initial use.
6. Ensure setpoint is within desired range (default is -80˚C) or change setpoint to user-preferred
temperature according to the control functions outlined below.
Guide to Basic Graphical User Interface (GUI) Functions
ON / OFF Switch the main power on, located at the back of the unit adjacent to the AC
cord.
Change Setpoint Tap Home > Set-up > Enter PIN > Enter > Select Setpoint Type > +/- > Save
Silence Alarm Tap on-screen alarm warning
Event Log Tap Home > Event Log > use ^ / v to view
Chart History Tap Home > Chart History >Select Chart History Type > use < /> to view
Guide to Advanced GUI Functions
Alarm Set-up Tap Home > Set-up > Enter PIN > Enter > Alarms > Select Alarm Type > use
+/- to adjust > Save
Date and Time Tap Home > Set-up > Enter PIN > Enter > Date / Time > Select Date/Time
component > use +/- to adjust > Save
Change PIN Tap Home > Set-up > Enter PIN > Enter > PIN > Enter New PIN > Enter >
Re-enter New PIN > Enter
Calibrate RTDs Requires Authorized Service & PIN
Tap Home > Set-up > About > Service > Enter Service PIN > RTD Calib. >
Select RTD > use +/- to adjust > Save
Handle Operation
The Stirling Ultracold handle is designed for one-handed operation. To open the freezer, rotate
handle towards the user approximately 90°. To engage the Power-Release, apply firm downward
pressure on the handle while in its open position. The Power-Release assists when the freezer
door is adhered to the gasket after long periods of non-use as well as when air pressure is not yet
equalized. To close, with handle in the horizontal position, push door to cabinet and return the
handle to its original vertical position.
Caution:
Tipping Hazard
The unloaded freezer is TOP HEAVY. Use caution in moving and installation. Do not pitch the
freezer more than 12 degrees from horizontal. Doing so may cause it to tip over.

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The SU780XLE model incorporates next generation free-piston Stirling engine technology.
Free-piston Stirling engine technology differs from conventional compressor-based
refrigeration by providing high efficiency, deep-temperature cooling in a compact package.
SU780XLE
Ultra-Low Temperature Freezer -86ºC
Table of Contents:
1. INTRODUCTION . . . . . . . . . . . . . . . . . .6-8
1.1 Description. . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2 Intended Uses. . . . . . . . . . . . . . . . . . . . . . 6
1.3 Documentation . . . . . . . . . . . . . . . . . . . . 6
1.4 Organization of this Manual . . . . . . . . 6
2. FEATURES OF THE SU780XLE . 8-11
2.1 Free-Piston Stirling Engine. . . . . . . . . . 8
2.2 Cabinet Design Features. . . . . . . . . . . . 8
2.3 Handle Features . . . . . . . . . . . . . . . . . . . . 8
2.4 Temperature Monitoring Features . . 8
2.5 Graphical User Interface (GUI). . . . . . . 9
2.6 Pictorial Tour . . . . . . . . . . . . . . . . . . . 10-11
2.7 Included Items . . . . . . . . . . . . . . . . . . . . 10
3. SAFETY PRECAUTIONS . . . . . . 12-13
4. UNPACKING AND
INSTALLATION . . . . . . . . . . . . . 14-16
4.1 Freezer Site Qualification . . . . . . . . . . 14
4.2 Unpacking and
Unloading Procedure . . . . . . . . . . . . . . . . . 15
4.3 Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5. OPERATION. . . . . . . . . . . . . . . . 17-31
5.1 Responsible Operation . . . . . . . . . 17-29
5.2 Handle Operation . . . . . . . . . . . . . . . . . 17
5.3 Graphical User Interface (GUI) . . . . . 17
5.3.1 Modifiable Values . . . . . . . . . . . . . . . . 17
5.3.2 PIN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.3.3 GUI Menu . . . . . . . . . . . . . . . . . . . . . . . . 18
5.3.4 Basic GUI Controls . . . . . . . . . . . . . . . . 19
5.3.5 GUI Instructions . . . . . . . . . . . . . . . 20-29
5.4 Managing Freezer Contents . . . . . . . 30
5.5 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.6 Calibration of the RTD . . . . . . . . . . . . . 30
5.7 Safety Precautions . . . . . . . . . . . . . . . . . 31
6. TRANSPORTING, MOVING
AND STORAGE . . . . . . . . . . . . . . . . 32
7. PREVENTATIVE MAINTENANCE &
SERVICE . . . . . . . . . . . . . . . . . . . . . . 33
7.1 Monthly Maintenance . . . . . . . . . . . . . 33
7.1.1 De-ice Gaskets and Breaker . . . . . . . 33
7.1.2 Inspect Vacuum Relief Port. . . . . . . . 33
7.2 Yearly Maintenance. . . . . . . . . . . . . . . . 33
7.2.1 Check and Clean Heat Reject Fins . 33
7.2.2 Check Door Alignment . . . . . . . . . . . 33
7.3 Biennial Maintenance. . . . . . . . . . . . . . 33
7.3.1 Replace Battery . . . . . . . . . . . . . . . . . . 33
7.4 Power Cord Replacement. . . . . . . . . . 33
8. TROUBLESHOOTING . . . . . . . . . . . 34
9. SPECIFICATIONS. . . . . . . . . . . . 35-37
9.1 Freezer Specifications. . . . . . . . . . . 35-36
9.2 Performance Data . . . . . . . . . . . . . . . . . 37
9.3 Materials Specifications. . . . . . . . . . . . 37
10. WARRANTY. . . . . . . . . . . . . . . 38-39

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1. Introduction
1.1 – Description
The Stirling Ultracold SU780XLE Ultra-Low Temperature Freezer uses a unique free-
piston Stirling engine to provide high efficiency, deep-temperature cooling.
1.2 – Intended Uses
The SU780XLE freezer provides ultra-low temperature storage for general (non-
flammable) research laboratory materials requiring a stable, computer-controlled,
deeply-frozen environment. The SU780XLE is registered with the FDA as a Class
1 medical device (Product Code JRM). The storage of blood or blood products
intended for medical purposes is prohibited.
The SU780XLE freezer is classified for use as stationary equipment in a Pollution
Degree 2 and Overvoltage Category II environment. The unit is designed to operate
under the following environmental conditions:
• Indoor use
• Altitude up to 2000 m
• Maximum relative humidity 80% for temperatures up to 31°C decreasing linearly
to 50% relative humidity at 40°C
1.3 – Documentation
This operating manual describes all aspects of receiving, installing, set-up, use, moving
and storage of the Stirling Ultracold SU780XLE
Freezer.
The freezer is controlled with a Graphical
User Interface (GUI). This operating manual
describes use of the GUI in Section 5.
1.4 – Organization of this Manual
This manual is organized as follows:
• Features
• Safety Precautions
• Unpacking and Installation
• Operation
• Transporting, Moving and Storage
• Preventative Maintenance
• Troubleshooting
• Specifications
• Warranty
Please note that precautions and safety
instructions are part of each section and
must be observed to avoid damage to the freezer or harm users.
Model SU780XLE

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User Advisory:
Deep temperatures are dangerous, use proper precautions when operating ultra-
low temperature freezers. This ultra-low temperature freezer is intended for storage
of frozen sample product or vials at deep temperatures. Stirling Ultracold, a Division
of Global Cooling, Inc. cannot be held responsible for damages or loss of stored
product attributed to unintended use. In no case will Stirling Ultracold, a Division
of Global Cooling, Inc. be held liable for loss of stored product resulting from
electrical, mechanical or structural failure. As with any ultra-low temperature freezer,
appropriate back-up and redundancy considerations are the responsibility of the
user.
To assure the correct use of the product, basic safety measures should always be
followed including the warnings and cautions listed on the product and in this
operating manual.
Hazard Symbols
This symbol used alone indicates important operating instructions
which reduce the risk of injury or poor performance of the unit.
CAUTION: This symbol, in the context of a CAUTION, indicates a
potentially hazardous situation which if not avoided could result in minor
to moderate injury or damage to the equipment.
WARNING: This symbol, in the context of a WARNING, indicates
potentially hazardous situations which, if not avoided, could result in
serious injury or death.
Flammable warning messages alert the user to possible risks of
personal injury and equipment damage.
Degrees of Danger
DANGER Will lead to severe injuries or death
WARNING May lead to severe injuries or death
CAUTION May lead to light to moderate injuries
NOTICE May lead to material damage
Flammable Refrigerant Use:
SU780XLE uses 90 grams of R-170 (Ethane) in a hermetically sealed thermosiphon
tubing. It requires caution in use and repair.
A. Danger – Risk of Fire or Explosion. Flammable Refrigerant Used. Do Not Drill
or Puncture Inner Liner.
1. Introduction

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2. Features of the SU780XLE
2.1 – Free-Piston Stirling Engine
The SU780XLE Ultra-Low Temperature Freezer uses the Stirling Ultracold Model M600
free-piston Stirling engine to provide high efficiency, deep-temperature cooling.
No HCFC or CFC refrigerants are used in the M600 and SU780XLE. The M600 Stirling
engine uses approximately 10 grams of helium gas as a working fluid. Approximately
90 grams of R-170 (Ethane) is used in the thermosiphon which removes heat from
the freezer.
2.2 – Cabinet Design Features
The cabinet utilizes vacuum-insulated panels with non-HFC polyurethane
foam support providing an internal volume of approximately 780 liters. The
environmentally friendly blowing agent is Ecomate®. Door sealing consists of three
gaskets that are fully replaceable. The handle uses cam-actuated, 90° rotation to
apply a mechanical advantage in opening the freezer door. An integrated door
gasket heater minimizes water or ice deposits on the gasket interface.
2.3 - Handle Features
The Stirling Ultracold handle is designed for one-handed operation. A Power-Release
cam assists when the freezer door is adhered to the gasket after long periods of non-
use as well as when air pressure is not yet equalized.
2.4 – Temperature Monitoring Features
One Resistance Temperature Detector (RTD) measures the internal cabinet
temperature of the SU780XLE. The RTD provides input to the controller and the
GUI (Graphical User Interface) display for reporting and logging. The RTD may be
calibrated by the user through the GUI. The GUI provides a door open time-out
alarm and monitors the temperature for instances beyond high and low limits. These
limits can be set automatically or adjusted manually. Alarms are reported through
an audible alarm in the freezer enclosure and through a contact closure that may be
connected to an external alarm. The GUI provides options to temporarily suppress
alarms and set a delay time before the alarm is reported via the contact closure.
B. Danger – Risk of Fire or Explosion. Flammable Refrigerant Used. To be Repaired
Only by Trained Service Personnel. Component Parts Shall Be Replaced With
Like Components. Do Not Puncture Refrigerant Tubing.
C. Caution – Risk of Fire or Explosion. Flammable Refrigerant Used. Consult
Repair Manual/Owner’s Guide Before Attempting to Service this Product.
All Safety Precautions Must be Followed.
D. Caution – Risk of Fire or Explosion. Dispose of Properly in Accordance
with Federal or Local Regulations. Flammable Refrigerant Used.
E. Caution – Risk of Fire or Explosion Due to Puncture of Refrigerant Tubing;
Follow Handling Instructions Carefully. Flammable Refrigerant Used.

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2.5 – Graphical User Interface
The Graphical User Interface (GUI) is implemented on a touch screen control panel
on the front of the cabinet. The GUI allows the user to:
• Set freezer control, alarm and communications parameters
• Provide password protected access to parameter changes
• Display freezer status
• Display temperature graph and event log
• Display diagnostic and service information
• Display freezer identification information
The following SU780XLE parameters are accessed and modified through
the GUI touch screen (for complete instructions see Section 5).
Accessible Values Modiable Values
Current freezer temperature Temperature setpoint
Temperature history chart Under temperature limit
Alarm status Over temperature limit
Event log Over temperature alarm delay after door opening
Battery information Audible alarm silence duration
"About" screen (general information) External contact alarm delay
Service contact information Door open alarm delay
Door defrost percentage
Password Identification Number (PIN)
Current date
Current time
RTD calibration adjustments
2. Features

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2.6 – Pictorial Tour
1. Mechanical compartment containing M600 Stirling engine
2. Temperature recorder location (optional)
— Factory or field installed
3. LCD Display and Graphical User Interface (GUI)
4. Magnetic latching inner doors
5. Vacuum relief port (interior, not shown)
6. Recessed electrical panel
A. AC Power Switch
B. AC Power Connector - Universal power input
120 to 240VAC at 50/60 Hz, single phase
C. Seismic Strap Anchor Location (accepts - 5/16"-18 x 5/8" screw)
7. Recessed accessory panel
C. Seismic Strap Anchor Location (accepts - 5/16"-18 x 5/8" screw)
D. External Alarm Terminal (dry contacts), 4-20mA (optional) [ (+) : (-) : G : NC : NO : C ]
(+) - Positive
(-) - Negative
G - Ground
NC - normally closed, opened at alarm
NO - normally opened, closed at alarm
C - common
E. CO2/LN2Backup connector (optional - factory or field installed)
F. Ethernet Port
8. Air vent
9. Outer door hinges
10. Access port for independent thermocouple
— 0.5" (12.7 mm) with plug
11. Cabinet breaker
12. Dual-wheel casters and leveling feet at front casters
13. Stainless steel shelves (shown with 2 shelves)
— Adjustable on 0.5" (12.7 mm) centers
14. Temperature sensor (RTD)
15. Lockable door handle
16. Flexible door gasket
17. Electrical grounding stud
— Inside mechanical compartment, not shown
2.7 – Included Items
• Packing List
• Operating Manual (this document)
• Quick Guide
• Port Sealant
• Dry Contacts Plug
• 2 Keys
• Ice Scraper
• 1 Wrench

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17
2. Features
CAUTION:
Tipping Hazard
The unloaded freezer is TOP HEAVY. Use caution in moving and installation. Do not
pitch the freezer more than 12 degrees from horizontal. Doing so may cause it to tip
over.
8
8
6
AB
C
9
2
4
14
15
16
13
11
12
3
10
1
5
D
C
7
C
E
F

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3. Safety Precautions
Potential hazards associated with use of the SU780XLE freezer may impact the safety
of persons in the workplace in which the freezer is installed. This includes persons
who operate the freezer, and other personnel in its vicinity. The freezer itself may
also be damaged and/or its warranty voided by improper operation or usage. All
personnel that install, operate, transport or place the freezer into storage should read
this entire manual to understand those hazards. Consider storing this manual for
ready reference within close proximity of the freezer.
Specific precautions are included in each section of this operating manual. However,
several important general precautions must be observed and are described below.
• Do not disassemble, modify or repair.* There are no user serviceable parts inside the
freezer unit. Contact Stirling Ultracold for authorized repair procedures as required.
• Do not immerse in water, pour water on the unit, or operate where water may drip
or fall on the unit. Operation under extreme environmental conditions, e.g., in very
high humidity environments (RH 85% or more) also may lead to condensation or
water intrusion.*
• Do not modify the cabinet, controls or free-piston Stirling engine.*
• Do not cut, change or modify the power cable.*
• Do not store flammable items such as gasoline, thinner or solvents in the freezer
— The freezer is NOT designed for Flammable Material Storage or rated as an
explosion-proof freezer.
• Do not use hard and/or sharp objects, such as knives, screwdrivers, etc. to remove
any frost or ice that has accumulated on the inside of the freezer. The inside panels
are heat exchangers and can be damaged. Defrosting the cabinet is described later
in this operating manual.
• Do not use solvents to clean the panel or the outside or inside of the freezer.
• Do not remove the power cable by pulling on the cable, instead grasp the plug firmly
and pull away from the outlet.
*Doing so will void the warranty.

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• Do not block the air vents from the mechanical compartment.
— 4" clearance on right side of unit is recommended.
• Frostbite can occur instantly at -86°C. Safe operating procedures are essential.
— Do not handle samples or freezer accessories with bare hands. Be especially
careful not to spill ultra-low temperature materials onto skin or clothing.
— Do not use gloves that become brittle at ultra-low temperatures.
— Nitrile and latex gloves are inadequate.
— Permeable gloves are dangerous because frozen materials can contact skin
and cause damage.
— Be especially careful that materials at low temperatures are not spilled onto
skin or clothing.
• Ultra-low temperatures may adversely impact freezer contents:
— Do not put ice or liquid water directly in the freezer box; always use
suitable containers.
— Use only sample containers that have been approved or tested for ultra-low
temperature use.
— Do not use glass containers when the contents might freeze and expand.
— Some plastics shatter at ultra-low temperatures. Avoid splinter hazards.
— Biological and chemical hazards are still hazardous at ultra-low temperatures.
Always wear proper protective equipment and follow appropriate isolation
protocols.
— Many types of labels will fall off and/or break at ultra-low temperatures. Some
types of ink which stick to glass and/or plastic at room temperature lose adhesion
at ultra-low temperature.
• In addition to the ultra-low temperature hazards above, there are also physical
hazards to consider:
— Be cautious when closing the door to avoid a pinching hazard.
— Be careful when loading the cabinet with heavy items.
3. Safety Precautions

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4. Unpacking and Installation
NOTE: Prior to installing the SU780XLE, inspect the unpacked unit and any included
items for shipping damage. Compare all contents to the packing list for completeness.
4.1 – Freezer Site Qualication
1. Note the shipping packaging dimensions of 2184 x 1092 x 1118 mm
(86" H x 43" D x 44" W) and shipping weight of 352 kg (775 lbs).
2. Be mindful when moving the shipment from the point of receipt to the place
where it will be unpacked. The installation site must accommodate the freezer
exterior dimensions of 1994 x 870 x 915 mm (78.5" H x 34.3" D x 36" W) and
weight of 284 kg (625 lbs).
3. There are no specific required clearances for the top and back of the freezer;
however allowances must be made for electrical connections to the panel
on the back of the freezer. The left side requires appropriate space for handle
access. The right side requires appropriate space for door opening and air
vent.
4. The access port must be plugged at all times for normal operation. Ingress to
the access port (see Section 2.6) is required during normal operation.
5. The freezer should be installed on a level surface. The leveling feet can
accommodate small variations.
6. There must be sufficient room to fully open the freezer door in order to access
contents.
7. The facility/room lighting must not obscure the readability of the touch
screen display and must provide good visibility for working with the contents
of the freezer.
8. Do not block the air vents from the mechanical compartment.
4" clearance on right side of unit is recommended.
9. Care must be taken while unpacking and installing the freezer. Be mindful
of its size and weight. Dropping the freezer is likely to damage it.
10. TIPPING HAZARD: Do not pitch the freezer more than 12 degrees from
horizontal. Doing so may cause it to tip over. CAUTION: TOP HEAVY.

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4. Unpacking and Installation
4.2 – Unpacking and Unloading Procedure
1. Remove strapping (1).
2. Remove the top-cover (2) (comprised of wooden frame & cardboard box lid).
3. Remove taping (3) from the middle of cardboard shipping unit. Note: the
shipping unit is configured as two square cardboard sections covering the
top portion and lower portion of the freezer separately.
4. Remove the top section of the shipping unit (4). Cut the cardboard using
a utility knife along the cutting line (5), located at the back of the unit.
CAUTION: Do not cut too deeply through the cardboard, as doing so may
damage the freezer.
5. Remove cardboard/foam supports.
6. Remove the bottom portion of cardboard shipping unit (6).
7. Remove plastic cover from the freezer.
8. Collapse all side walls of the bottom portion of the cardboard shipping unit
(7) to move the freezer.
9. Remove two ramps (8) from the bottom portion of the shipping unit and
place them at the front of the pallet, hooking the ramp - slot to the metal
plate located at the front of the shipping unit.
10. Make sure the two ramps are spaced appropriately for the width of the
casters and are parallel to each other.
11. Move the freezer slowly onto the ramp, with one person guiding each side for
balance. Have a third person assist in slowly guiding the freezer down the ramp
to the floor to avoid damage to equipment, facilities, or injury to personnel.
2
1
3
4
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7
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4.3 – Setup
1. Unpack freezer unit and included components, ensure all packaging material
has been removed from around the fan inlet and outlet holes.
2.Adjust the leveling feet (wrench included) to secure the freezer in place.
3. Before switching on electrical power to the freezer, make all desired
external connections:
A. AC power connection
B. External alarm
4. Switch the AC power to the "On" position.
5. Notice: Ensure the access port stopper or sealant is in place. Remove factory
tape at the port stopper prior to initial use.
6. Review the date, time and temperature setpoint within the Graphical User
Interface and adjust as needed. Default setpoint is -80°C.
7. A one-time temperature alarm suppression provided by the software allows
for the initial cooling of the freezer after start-up.
8. After the freezer reaches its operating temperature and its door is opened
and closed, the partial vacuum created when warm air is admitted, then
cooled, will prevent reopening of the door until the pressure is equalized.
A vacuum relief port is provided to accelerate this process.
9. Be mindful of any electrical shock hazards associated with making electrical
connections to the freezer, especially the external alarm connection.

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5. Operation
5.1 – Responsible Operation
Responsibility for freezer operation should be part of the policy and procedure
documentation or guidelines for the clinical, laboratory, or other activity for which
the freezer is used. Safety requirements are integral to these responsibilities. Use
this product only in the way described in the product literature and in this manual.
Before using it, verify that this product is suitable for its intended use. If this
equipment is used in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.
5.2 – Handle Operation
The Stirling Ultracold handle is designed for one-handed operation. To open the
freezer, rotate handle towards the user through an angle of about 90°. To engage the
Power-Release, gently apply firm, downward pressure on the handle while in its open
position. The Power-Release assists when the freezer door is adhered to the gasket
after long periods of non-use as well as when air pressure is not yet equalized. To
close, with handle in the horizontal position, push door to closed position and return
the handle to its original vertical position.
5.3 – Graphical User Interface (GUI)
Values for the following SU780XLE parameters are viewed and modified through the
GUI touch screen.
5.3.1 Modiable Values
The GUI is pre-programmed with default values for most parameters. Unless
temperature limits are set manually, the software calculates default values
appropriate for the temperature setpoint.
Accessible Values Modiable Values
Current freezer temperature Temperature setpoint
Temperature history chart Under temperature limit
Alarm status Over temperature limit
Event log Over temperature alarm delay after door opening
Battery information Audible alarm silence duration
"About" screen (general information) External contact alarm delay
Service contact information Door open alarm delay
Door defrost percentage
Password Identification Number (PIN)
Current date/time
RTD calibration adjustments
4-5. Installation, Operation

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5.3.2 PIN
A Password Identification Number (PIN) may be set, but is not displayed. Use the PIN
to restrict access to GUI controls. The default PIN is 1234 and may be changed by the
user to any four-digit numeric code or disabled.
5.3.3 – GUI Menu
A hierarchical menu system is used to display and adjust system values. Each screen
has a button to return to the default "Home" screen and a “Back” button to return to
the prior level of the menu. Screen names (where applicable) are within brackets.
Home – display of current freezer temperature.
Data – display of current freezer temperature, system date and time, temperature setpoint and
door defrost status (if at 0%).
• Set-up – display current temperature setpoint. PIN required if enabled.
• Alarms – display and change alarm delay settings
• Temp. Delay (min) – duration of time in which the audible alarm is delayed
when temperature is out-of-specification.
• Silence Dur. (min) – duration of time in which the audible alarm is delayed after
the 'Silence' button is tapped.
• Ext. Delay (min) – duration of time in which the alarm dry contact activation is
delayed after the alarm condition is detected.
• Door Delay (min) – duration of time that the door may remain open before an
audible alarm sounds.
• Battery Info – display battery voltage and current information.
• Date/Time – display and change system date and time.
• Door Defrost – adjust defrost heater between 0 to 100%. A warning will be displayed
on 'Home' screen if set to 0%.
• Setpoint – display and adjust over temperature setpoint, temperature setpoint, and
under temperature setpoint
• PIN – disable/enable the system PIN and change PIN.
• Event Log – track the last 200 alarm conditions such as: door openings, temperature
setpoint changes, over temperature condition, and power outages.
• Chart History – display the cabinet interior air temperature over the last 12 hours, 24 hours
or 7 days. Increase chart resolution by tapping the screen.
• About – display freezer model number, serial number, firmware version, engine number, run
hours, temperature setpoint, and date.
• Alarm Test – test the system alarm.
• Service Contact – display manufacturer contact information.
• Service – display temperature setpoint, cabinet and cold-head RTD temperatures,
warm-head thermistor temperature, as well as engine voltage, current and power.
Service screen information is used for service by authorized personnel only.
Service PIN required.
• RTD Calib. – display RTD readings and calibration offsets. Calibration is used
to compensate for discrepancies between Display RTD and user-supplied
temperature measurement.

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Operating Manual: SU780XLE SU780XLE-LIT-OM-I | 11.18.19 www.stirlingultracold.com
5.3.4 Basic GUI Controls
• To change a value on the screen
– Tap the appropriate button to highlight the parameter
– Use the +/- or < / > buttons to enter the desired value
– Then use the “Save”button to complete the change.
• Each screen has a button to return to the default "Home" screen and/or a “Back”
button to return to the prior level of the menu.
• PINs are entered through a numeric keypad screen with an“Enter” button to
complete the entry and a “Cancel” button to terminate the entry.
• PINs may be disabled on the PIN screen by leaving the new PIN value blank.
When the PIN is disabled, any person can perform all actions available via the GUI,
including changing the temperature setpoint and alarm settings.
Guide to Basic GUI Functions
ON / OFF Switch the main power on, located at the back of the unit adjacent
to the AC cord.
Change Setpoint Tap Home > Set-up > Enter PIN > Enter > Select Setpoint Type > +/- >
Save
Silence Alarm Tap on-screen alarm warning
Event Log Tap Home > Event Log > use ^ / v to view
Chart History Tap Home > Chart History >Select Chart History Type > use < /> to
view
Guide to Advanced GUI Functions
Alarm Set-up Tap Home > Set-up > Enter PIN > Enter > Alarms > Select Alarm
Type > use +/- to adjust > Save
Date and Time Tap Home > Set-up > Enter PIN > Enter > Date / Time > Select Date/
Time component > use +/- to adjust > Save
Change PIN Tap Home > Set-up > Enter PIN > Enter > PIN > Enter New PIN >
Enter > Re-enter New PIN > Enter
Calibrate RTDs Requires Authorized Service & PIN
Tap Home > Set-up > About > Service > Enter Service PIN > RTD
Calib. > Select RTD > use +/- to adjust > Save
5. Operation

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5.3.5 – Graphical User Interface (GUI) Instructions
1. Power Up
The Power Up screen will appear for 20 seconds when the freezer is initially turned on.
2. Home
The Home Screen displays the current temperature of the freezer.
• Tap the display to access the Data screen