LabRepCo GM-ULT-1786 User manual

Part number 21729, Rev 4
ULTRA LOW TEMPERATURE FREEZER
OWNER’S INSTRUCTIONS
This manual describes how to operate and care for your appliance to get the best, most efficient
performance.
READ THIS BOOK!
Note to Customer:
This merchandise was carefully packed and thoroughly inspected before leaving our plant. Responsibility
for its safe delivery was assumed by the carrier upon acceptance of the shipment. As directed on the side
of your packing carton, claims for loss or damage sustained in transit must be made on the carrier as
follows:
A.) Visible Loss, Damage, Shortage External Evidence of Loss or Damage: This type of damage
must be noted on the freight bill and acknowledged by the carrier’s agent (driver) at time of delivery.
Make sure you get a signed copy. Send a written request for an inspection to the carrier.
B.) Concealed Damage: This type of damage may not be discovered until the unit is being unpacked.
When concealed damage is discovered, stop unpacking immediately and contact the carrier
immediately to report the claim and request an inspection. This should be done as soon as possible
and, in any case, must be done within 15 days or receiving the merchandise. If at all possible, do not
move the item and save all packaging material for carrier’s inspection.
C.) FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN THE CARRIER
REFUSING TO HONOR YOUR COMPANY’S CLAIM. UNDER NO CIRCUMSTANCES
SHOULD THE MERCHANDISE BE RETURNED TO THE MANUFACTURER. NO
RETURNS WILL BE ACCEPTED WITHOUT PRIOR AUTHORIZATION.

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Part number 21729, Rev 4
Table of contents
Table of contents.................................................................................................................................................. 1
Installation and start–up ....................................................................................................................................3
Control overview..................................................................................................................................................4
Control operation ................................................................................................................................................5
Setting the time and date................................................................................................................................5
Changing the Temperature Settings...............................................................................................................5
Changing Alarm Settings ................................................................................................................................5
Setting security access code (optional) ..........................................................................................................6
Control menus .....................................................................................................................................................8
Alarms ..................................................................................................................................................................8
Alarm Criteria................................................................................................................................................10
Door Open.......................................................................................................................................................11
Sensor Errors.................................................................................................................................................12
Contacts and communications..........................................................................................................................13
Remote alarm contacts..................................................................................................................................13
Maintenance intervals.......................................................................................................................................14
Maintenance procedures...................................................................................................................................14
Air filter..........................................................................................................................................................14
Condenser......................................................................................................................................................14
Annual calibration......................................................................................................................................... 15
Battery replacement...................................................................................................................................... 15
Door gasket and vacuum relief port............................................................................................................. 15
Defrost............................................................................................................................................................ 15
Calibration .....................................................................................................................................................16
Options...............................................................................................................................................................16
Sample probe.................................................................................................................................................16
Chart recorder. .............................................................................................................................................. 17
Chart recorder fuse........................................................................................................................................ 17
Troubleshooting ............................................................................................................................................ 17
Specifications.....................................................................................................................................................18
Statement of Warranty......................................................................................................................................19

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Part number 21729, Rev 4
BEFORE CALLING THE MANUFACTURER’S TECHNICAL
SERVICE DEPARTMENT, please have the unit’s model and serial
number ready as well as the problem description. The model and serial
number is located on the serial tag which can be found on the interior left
OR right upper wall of the unit.
For convenience, you may want to record the following information here for
easy access in the future.
Model number: __________________________________
Serial number: __________________________________
Date of delivery: _________________________________

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Part number 21729, Rev 4
Power: The ULT requires a dedicated power outlet and circuit breaker: 20-amp circuit for
115V models and 15-amp circuit for 230V models.
Installation and start–up
Placement clearance:The freezer must have a clearance of 5” in the rear and 6”
on each side so that sufficient air circulation is maintained for the removal of
exchange heat.
Start –up: Plug the ULT into power and engage the power switch/breaker located above the
power cord. The freezer will start, and the control panel will illuminate in the default status with
the words SYSTEM NORMAL in the message line, which is the top line of the control display.
The other lines will display available operating modes. You will note a pointer (˃) on the third
line.
The third line is always the active line, which means that you will enter that mode or menu by
pressing ENTER.
The default status:
Temperature Set Point (SP) -80ᵒC
High temp alarm SP+10ᵒC
Low temp alarm SP-10ᵒC
Password security OFF
Access code 1234
NOTICE!
READ THIS MANUAL
It is necessary to read and understand this instruction
manual because failure to do so may result in (1)
substandard performance of your freezer, (2) damage to
your freezer and stored items, and also (3) possible
injury to operating personnel.

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Part number 21729, Rev 4
Control overview
The SYSTEM NORMAL display is a monitoring and access screen from which you may enter any
of the 4 control modes:
CONFIGURE
CALIBRATE
RUN
SETTINGS
The default setting will be sufficient for many hours while your freezer cools. You may
familiarize yourself with the control by setting the time, the date, and perhaps setting an access
code (numerical password).
Keys: The ENTER key serves to (1)accept menu selections and value changes and (2) advance
the active value through a row of values. The BACK key permits you to scroll back through the
values or menu.
The UP and DOWN keys permit you to make numeric steps in settings and selections in the
menu
Warning lights are provided for Voltage boost (which means you should speak to your
maintenance department about low line voltage).
The Low battery warning light indicates that you need to replace the battery, the procedure for
which is explained in the chapter on Maintenance.
UP and DOWN keys
BACK and ENTER keys
SILENCE key
VOLTAGE BOOST & LOW
BATTERY indicators

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Part number 21729, Rev 4
Alarms:Your freezer is protected with 21 alarm monitors. In the event of an alarm, an ALARM
MESSAGE will appear in the message line at the top of the screen and an alarm will sound.
Consult the chapter on Alarms in this manual
Control operation
Setting the time and date.
1. Using the DOWN key, scroll to SETTINGS and press ENTER.
2. Scroll to SET TIME and press ENTER
3. The active value in the date display (hours) will blink on and off.
Set the value using the UP and DOWN keys, and Press ENTER to
set the value (hour), and move to the next value (minutes).
Set minutes using UP and DOWN keys, press ENTER to save. The
active value will automatically scroll to the next settable value,
which is SET DATE.
4. Follow the same process to set the date.
Pressing BACK at any time will cancel the entered values.
Changing the Temperature Settings
1. Navigate to the SETTINGS mode, and press ENTER to access
the SETTINGS mode menu.
2. Use the UP and DOWN keys to scroll to the TEMP SET line,
then press ENTER.
3. Use the UP and DOWN keys to set the temperature to the
desired value, then press ENTER
Changing Alarm Settings
1. The high (HI) and low (LO) alarm settings are set in the same
way as the TEMP SET described above. Note that the alarms
cannot be set any closer to the temperature set point than 10
degrees.
SYSTEM NORMAL
RUN MODE
˃SETTINGS MODE
SETTINGS MODE
˃SET TIME= 20:20:06
ACC CODE DISABLED
SETTINGS MODE
HI ALRM SET= -60.0
˃TEMP SET = -70.0
LOW ALRM SET= -80.0
SETTINGS MODE
LO ALRM SET= -80.0
˃SET DATE = 00/00/00
SETTINGS MODE
ADJUST
˃TEMP SET = -70.0
USING UP & DOWN
SETTINGS MODE
ACC CODE DISABLED
˃HI ALRM SET= -60.0
TEMP SET= -70.0

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Part number 21729, Rev 4
The alarms that may be set by the user are
HIGH TEMP ALARM
LOW TEMP ALARM
Setting security access code (optional)
When delivered, the freezer has the password security value in the
OFF setting. This means that access to modes and settings other
than RUN can be addressed.
If you want to restrict access to all menus other than the RUN
menu, which is a read-only menu, then you may activate the
password security (PASSWRD SECURITY) by switching it to the
ON setting. This setting resides in the CONFIGURE menu.
Once you activate password security, you will automatically
acquire the factory default password, which is a four-digit
numerical code.
Default access code: 1 2 3 4
You may change the code itself by addressing the
SETTINGS menu.
Please note the two menus on the right, and remember that the
choice of whether or not a code is needed is made in the
CONFIGURE menu; but the code itself is edited in the SETTINGS
menu.
Setting security access ON of OFF
1. Navigate to the CONFIGURE mode on the SYSTEM level menu,
and then press ENTER.
This will take you to the CONFIGURE menu.
Scroll down to PASSWRD SECURITY OFF (the current status).
2. Use the UP and DOWN keys to change from
PASSWRD SECURITY OFF to
PASSWRD SECURITY ON,
And press ENTER.
You have now activated password protection
CONFIGURE MENU:
Ring-back delay
Password security
( Status message )
LCD contrast
Run battery test
Battery back up
Sample
SETTINGS MENU:
Set time
Set date
Access code
High alarm
Temperature set
Low alarm
SYSTEM NORMAL
˃CONFIGURE MODE
CALIBRATION MODE
CONFIGURE MODE
ADJUST
˃PASSWRD SECURITY ON
USING UP & DOWN

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Part number 21729, Rev 4
3. Press BACK to return to the system level menu.
Once you have activated PASSWRD SECURITY ON, the following
window will appear when an operator requests access to any menu
except the RUN menu:
Changing the password
The password (access code) is only required when the security
setting is ON.
1. Navigate to the SETTINGS mode line, and press ENTER
2 Scroll to the SET ACC CODE, and press ENTER
3. Set the access code by using the UP and DOWN keys to change
the value of each digit, and using the ENTER key to move to the
next value. You may also use the BACK key to move back through
the digits.
SECURITY ACCESS REQD
ENTER ACC CODE
ACC CODE= 0 0 0 0
PRESS ENTER FOR NEXT
UP
DOWN
ENTER
BACK
SYSTEM NORMAL
RUN MODE
˃SETTINGS MODE
SETTINGS MODE
SET TIME= 00:00:00
˃ACC CODE= 1 2 3 4
HI ALRM SET= -40
SETTINGS MODE
ADJUST
˃ACC CODE= 1 2 3 4
USING UP & DOWN

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Part number 21729, Rev 4
Control menus
Note that the RUN mode provides a “view only” menu in which you can verify settings. This is
the normal mode of operation for the freezer. To make changes in the settings themselves, you
must move to one of the other operation modes, CALIBRATE, CONFIGURE, or SETTINGS.
Operating modes and mode menus
Alarms
A series of alarms monitor the various operating conditions of the freezer. These alarms are
presented differently depending on the severity of the alarm condition.
The table below lists these alarms and also shows the method of notification. The “Message”
column shows what message will be displayed in the message center. The “Audible” column
shows if the audible device is activated. The “Ring Back” column indicates if the audible alarm
is repeated after a specific time frame. The ring back delay is user selectable in the
System
Normal
RUN
(View only)
CONFIGURE
CALIBRATE
SETTINGS
Version details
(software)
Condenser temp.
Heat exchanger temp.
Ambient temp.
Control temp.
Line voltage
Cycle period
Battery life
Ring-back delay
Password security
(Access code)
LCD contrast
Run battery test
Battery back up
Sample
See calibration
chapter for
calibration details.
Set time
Set date
Access code
(Status message)
High alarm
Temperature set
Low alarm

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Part number 21729, Rev 4
Configuration mode. The “Relay” column shows whether each alarm is of sufficient priority to
warrant activating the remote alarm contacts.
Note that the remote alarm contacts will always have a 30 minute delay to
activate to allow time for on-site personnel to react to and resolve the alarm
condition.
Upon the occurrence of any alarm, the top line of the message center display will list the alarm
message as shown in the list. In the case of multiple alarm conditions, the display will show
each alarm message on the top line in a repeating sequence on three second intervals. The
alarms will appear on the message center ONLY when in RUN mode. If the operator changes to
a different mode, the alarm LED and the audible alarm will remain active, but the message
center top line will display whatever the normal message would be in that mode.
Description Message Audible
Ring
Back Relay
High control probe temperature
HIGH TEMP ALARM
yes
yes
yes
Low control probe temperature
LOW TEMP ALARM
yes
yes
yes
Door is open DOOR OPEN
Yes if ˃1
min. yes yes
Power failure – loss of AC input
voltage
POWER FAILURE 1
yes
no
yes
Power failure – loss of 12V power
supply
POWER FAILURE 2 yes no yes
Power failure – output of 12V
power supply is low with AC
voltage applied
POWER FAILURE 3 yes yes yes
Wrong power connected
WRONG POWER
yes
yes
yes
High Ambient Temperature
HIGH AMBIENT TEMP
no
n/a
no
Low battery voltage
LOW BATTERY
yes
yes
no
High stage system failure
H S SYSTEM FAILURE
yes
yes
yes
Low stage system failure
L S SYSTEM FAILURE
yes
yes
yes
Air flow alarm (determined from
temp probes) AIR FLOW PROBLEM yes yes no
Low voltage alarm
LOW LINE VOLTAGE
yes
yes
yes
High voltage alarm
HIGH LINE VOLTAGE
yes
yes
yes
Control Probe failure
CONT PROBE FAILURE
yes
yes
yes