Helmer Horizon series Installation and user guide

360127-D/E
Refrigerator Service and Maintenance Manual
i.Series®and Horizon Series™ - Upright
Laboratory
i.Series
iLR111, iLR120, iLR125, iLR245,
iLR256
Horizon Series
HLR111, HLR120, HLR125, HLR245,
HLR256
Pharmacy
i.Series
iPR111, iPR120, iPR125, iPR245,
iPR256
Horizon Series
HPR111, HPR120, HPR125, HPR245,
HPR256
Blood Bank
i.Series
iB111, iB120, iB125, iB245, iB256
Horizon Series
HB111, HB120, HB125, HB245, HB256
360373/B

Document Updates
The document is furnished for information use only, is subject to change without notice and should not be construed as a
commitment by Helmer Scientic. Helmer Scientic assumes no responsibility or liability for any errors or inaccuracies that may
appear in the informational content contained in this material. For the purpose of clarity, Helmer Scientic considers only the most
recent revision of this document to be valid.
Notices and Disclaimers
Condential / Proprietary Notices
Use of any portion(s) of this document to copy, translate, disassemble or decompile, or create or attempt to create by reverse
engineering or otherwise replicate the information from Helmer Scientic products is expressly prohibited.
Copyright and Trademark
Copyright © 2018 Helmer, Inc. Helmer®, i.Series®, i.C³®, Horizon Series™, and Rel.i™ are registered trademarks or trademarks
of Helmer, Inc. in the United States of America. All other trademarks and registered trademarks are the property of their respective
owners. Helmer, Inc., doing business as (DBA) Helmer Scientic and Helmer.
Disclaimer
This manual is intended as a guide to provide the operator with necessary instructions on the proper use and maintenance of
certain Helmer Scientic products.
Any failure to follow the instructions as described could result in impaired product function, injury to the operator or others, or void
applicable product warranties. Helmer Scientic accepts no responsibility for liability resulting from improper use or maintenance of
its products.
The screenshots and component images appearing in this guide are provided for illustrative purposes only, and may vary slightly
from the actual software screens and/or product components.
Helmer Scientic
14400 Bergen Boulevard
Noblesville, IN 46060 USA
www.helmerinc.com
ISO 13485 CERTIFIED Part No. 360373 Rev B
Document History
Revision Date CO Supersession Revision Description
A 10 NOV 2016 12303 n/a Initial release (all units with serial numbers 2035000 and greater).
B12 JAN 201813333 B supersedes A
• Updated hysteresis data for 11 cu ft units
•Claried defrost event default settings in Table 7.
• Updated schematics to include changes in Horizon Access Control keypad,
Temperature Chart Recorder and Defrost Timer.
• Added FCC compliance information.
* Date submitted for Change Order review. Actual release date may vary.

Helmer Scientic i.Series® and Horizon Series™Refrigerator - Upright Service and Maintenance Manual
360373/B 2
Contents
1 About This Manual...................................................................................4
1.1 Intended Use...................................................................................4
1.2 Safety Symbols and Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3 Model and Input Power ...........................................................................6
1.4 Product Labels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
i.Series Information............................................................................7
2 InstallationandConguration .........................................................................7
2.1 Location Requirements ...........................................................................7
2.2 Placement and Leveling ..........................................................................7
2.3 Connect Back-Up Power..........................................................................7
2.4 Prepare for Monitoring............................................................................8
2.5 Congure Storage ..............................................................................10
2.6 Optional Adapter Kits for Medication Dispensing Locks ..................................................11
3 Controls...........................................................................................12
3.1 Home Screen and Screensaver ...................................................................12
3.2 Home Screen Functions .........................................................................12
3.3 Alarm Reference ...............................................................................13
3.4 Settings ......................................................................................13
3.5 Sensor Calibration..............................................................................17
4 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.1 Alarm Tests ...................................................................................23
4.2 Upgrade System Firmware .......................................................................24
4.3 Test and Replace Back-up Batteries ................................................................25
4.4 Check Probe Bottle .............................................................................25
4.5 Clean Refrigerator ..............................................................................25
5 Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.1 Refrigerant....................................................................................27
5.3 Remove / Replace Unit Cooler Cover ...............................................................28
6 Troubleshooting....................................................................................29
6.1 General Operation Problems......................................................................29
6.2 Chamber Temperature Problems ..................................................................29
6.3 Alarm Activation Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6.4 Testing Problems...............................................................................32
6.5 Condensation Problems .........................................................................32
7 i.Series Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8 Schematics ........................................................................................37
8.1 iB, iLR, iPR Models; 11, 20, 25, 45, 56 Cubic Feet .....................................................37

Helmer Scientic i.Series® and Horizon Series™Refrigerator - Upright Service and Maintenance Manual
360373/B 3
Horizon Series Information.....................................................................39
9 InstallationandConguration ........................................................................39
9.1 Location Requirements ..........................................................................39
9.2 Placement and Leveling .........................................................................39
9.3 Connect Back-Up Power.........................................................................39
9.4 Prepare for Monitoring...........................................................................40
9.5 Congure Storage ..............................................................................42
9.6 Optional Adapter Kits for Medication Dispensing Locks .................................................43
10 Controls...........................................................................................44
10.1 Monitor and Control Interface .....................................................................44
10.2 Alarm Reference ...............................................................................46
10.3 Settings ......................................................................................46
11 Maintenance .......................................................................................50
11.1 Alarm Tests ...................................................................................51
11.2 Test and Replace Back-up Batteries ................................................................52
11.3 Check Probe Bottle .............................................................................52
11.4 Clean the Refrigerator ...........................................................................52
12 Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
12.1 Refrigerant....................................................................................54
12.2 Replace LED Lamps ............................................................................54
12.3 Remove / Replace Unit Cooler Cover ...............................................................55
13 Troubleshooting....................................................................................56
13.1 General Operation Problems......................................................................56
13.2 Chamber Temperature Problems ..................................................................56
13.3 Alarm Activation Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
13.4 Condensation Problems .........................................................................58
14 Horizon Series Parts ................................................................................60
15 Schematics ........................................................................................63
15.1 HB, HLR, HPR Models; 11 Cubic Feet (Without Access Control) ..........................................63
15.2 HB, HLR, HPR Models; 11 Cubic Feet (With Access Control) ............................................64
15.3 HB, HLR, HPR Models; 20, 25, 45, 56 Cubic Feet (Without Access Control) ................................. 65
15.4 HB, HLR, HPR Models; 20, 25, 45, 56 Cubic Feet (With Access Control) ...................................66
15.5 Defrost Timer for HLR, HPR Models; 11, 20, 25, 45, 56 Cubic Feet ........................................67
Appendix A: Compliance ................................................................................68
Appendix B: Warranty...................................................................................69

Helmer Scientic i.Series® and Horizon Series™Refrigerator - Upright Service and Maintenance Manual
360373/B 4
1 About This Manual
This manual provides information on i.Series®and Horizon Series™upright laboratory, blood bank, and pharmacy refrigerators. It is
intended for use by end users of the refrigerator and authorized service technicians.
Models are indicated by a distinguishing model number that corresponds to the series, type, number of doors, and capacity of the
refrigerator. For example, “iLR125” refers to an i.Series Laboratory Refrigerator with 1 door and a capacity of 25 cu ft.
Generic references are used throughout this manual to group models that contain similar features. For example, “125 models”
refers to all models of that size (iB125, HB125, iLR125, HLR125, iPR125, HPR125). This manual covers all upright refrigerators,
which may be identied singly, by their size, or by their respective “Series”.
1.1 Intended Use
Note
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment
is operated in a commercial environment. This equipment generates, uses and can radiate radio frequency energy and, if
not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required
to correct the interference at his own expense.
Helmer refrigerators are intended for the storage of blood products and other medical and scientic products.
1.2 Safety Symbols and Precautions
Symbols found in this document
The following symbols are used in this manual to emphasize certain details for the user:
Task Indicates procedures which need to be followed.
Note Provides useful information regarding a procedure or operating technique when using Helmer
Scientic products
NOTICE Advises the user against initiating an action or creating a situation which could result in damage to
equipment; person injury is unlikely.
CAUTION Advises the user against initiating an action or creating a situation which could result in damage
to equipment or impair the quality of the products or cause minor injury.
WARNING Advises the user against initiating an action or creating a situation which could result in damage
to equipment and serious personal injury to a patient or the user.
Manufacturer
EC REP Authorized representative in the European Community

Helmer Scientic i.Series® and Horizon Series™Refrigerator - Upright Service and Maintenance Manual
360373/B 5
Symbols found on the unit
The following symbols may be found on the refrigerator or refrigerator packaging:
CE Mark (European units only) Earth / ground terminal
Caution: Risk of damage to equipment or
danger to operator Protective earth / ground terminal
Caution: Hot surface Compliance with Restriction of Hazardous
Substances Directive
Caution: Shock / electrical hazard Product falls under the scope of the WEEE
(Waste Electrical and Electronic Equipment)
directive.
Caution: Unlock all casters
Safety Precautions
Avoiding Injury
Review safety instructions before installing, using, or maintaining the equipment.
♦ Do not open multiple, loaded drawers at the same time.
♦ Do not move a unit whose load exceeds 900 lbs / 408 kg (single-door units) or 1350 lbs / 612 kg (double-door units).
♦ Before moving unit, ensure casters are unlocked and free of debris.
♦ Never physically restrict any moving component.
♦ Avoid removing electrical service panels and access panels unless so instructed.
♦Use manufacturer supplied power cords only.
♦ The refrigerator is not considered to be a storage cabinet for ammable or hazardous materials.
CAUTION
Decontaminate parts prior to sending for service or repair. Contact Helmer or your distributor for decontamination
instructions and a Return Authorization Number.

Helmer Scientic i.Series® and Horizon Series™Refrigerator - Upright Service and Maintenance Manual
360373/B 6
1.3 Model and Input Power
Note
Service information varies depending on the model and power requirements.
Table 1. Model and Input Power
Model Voltage Frequency Current Draw
111
115 V 60 Hz 7.0 A
230 V 50 Hz 3.5 A
230 V 60 Hz 3.5 A
120
115 V 60 Hz 7.5 A
230 V 50 Hz 4.2 A
230 V 60 Hz 4.2 A
125
115 V 60 Hz 7.5 A
230 V 50 Hz 4.2 A
230 V 60 Hz 4.2 A
245
115 V 60 Hz 11.5 A
230 V 50 Hz 6.0 A
230 V 60 Hz 6.0 A
256
115 V 60 Hz 11.5 A
230 V 50 Hz 6.0 A
230 V 60 Hz 6.0 A
* Amperage values are subject to change. Refer to the product specication label on your unit for current values.
1.4 Product Labels
This information appears on the product specication label, located on the rear of the refrigerator below the electrical box. The
model also appears on a label located in the chamber on the upper side of the right wall.
Note
Information contained in the specication label varies depending on the model and power requirements.
Sample Product Specication label.
Label Description
AModel (REF)
B Serial number
CPower requirements
C
B
A

Helmer Scientic i.Series® and Horizon Series™Refrigerator - Upright Service and Maintenance Manual
360373/B 7
i.Series Information
2 InstallationandConguration
2.1 Location Requirements
♦ Grounded outlet meeting the electrical requirements listed on the product specication label.
♦ Clear of direct sunlight, high temperature sources, and heating and air conditioning vents.
♦ Minimum 8“ (203 mm) above, and minimum 3” (76 mm) behind.
♦ Meets limits specied for ambient temperature (15˚C to 32˚C) and relative humidity.
2.2 Placement and Leveling
CAUTION
• The water evaporation tray, located on the rear of the refrigerator, may be hot. Do not use the tray as a handle.
• To prevent tipping, ensure the casters are unlocked, leveling feet (if installed) are lifted, and doors are closed before
moving the refrigerator.
1. Roll refrigerator into place and lock casters.
2. Ensure refrigerator is level.
Notes
• Helmer recommends the use of leveling feet.
• Use a wrench to raise or lower leveling feet. When the refrigerator is level, the bottom of the unit cooler will slope
downward from front to back and be parallel to the oor.
2.3 Connect Back-Up Power
The monitoring system and chart recorder each have a back-up battery system, enabling a period of continuous operation if power
is lost.
Battery life varies by manufacturer as well as voltage level remaining. Providing full power is available and no battery-related
alarms are active, back-up power for the monitoring system is available for up to 20 hours (the Low Battery alarm will activate after
approximately 18 hours of battery use). Providing full power is available, back-up power for the optional Access Control system is
available for up to 2.5 hours.
CAUTION
Before installing or replacing batteries, switch AC power and back-up battery OFF. Disconnect refrigerator from AC power.
Notes
• The optional Access Control system uses the monitoring system back-up battery for back-up power in the event of
power failure.
• The monitoring system will start on back-up battery power alone. If the refrigerator was not previously connected to AC
power and the back-up battery is switched on, the monitoring system will begin running on back-up battery power.
• If AC power is lost, the monitoring system will automatically disable some features to prolong back-up battery power.
Data collection will continue until back-up battery power is depleted.
The back-up battery is located on top of the refrigerator. For 111 models, a removable panel provides access to the back-up battery.
Monitoring system back-up battery (supplies power to optional Access Control system).
i.Series Information

Helmer Scientic i.Series® and Horizon Series™Refrigerator - Upright Service and Maintenance Manual
360373/B 8
2.4 Prepare for Monitoring
The back-up battery switch is switched off for shipping. Switch the back-up battery switch ON to provide the monitoring system
and optional Access Control system with back-up power in the event of AC power failure.
Temperature Probes
Notes
• Temperature probes are fragile; handle with care.
• The number and location of probes varies by model.
• Remote probes may also be introduced through the existing top port ,or through a side access port if available, and
immersed in existing probe bottles.
The number and location of probes varies by model. External probes may be introduced through the existing top port and
immersed in existing probe bottles, or through a side access port which is available in some models.
Probe bottle(s) along with a container of glycerin have been provided with this unit. The glycerin is used to create a solution which
simulates the product stored in the refrigerator. The product simulation solution temperature reects the product’s temperature
during normal operation.
Each probe bottle should contain 4 oz. (120 mL) of product simulation solution at a 10:1 ratio of water to glycerin.
Left: Probe bottle with temperature and chart recorder probes.
Middle: Top access port. Right: Side access port.
Fill Probe Bottle
1. Remove all probes from bottle and remove bottle from bracket.
2. Remove cap and ll with 4 oz. (120 mL) of product simulation solution.
3. Install cap and place bottle in bracket.
4. Replace probes, immersing at least 2” (50 mm) in solution.
Install Additional Probe Through Top Port
1. Peel back putty to expose port.
2. Insert probe through port into chamber.
3. Insert probe into bottle.
4. Replace putty, ensuring a tight seal.
Install Additional Probe Through Side Port
1. Remove interior and exterior plugs to expose side access port.
2. Insert probe through port into chamber.
3. Insert probe into bottle.
4. Ensure port is tightly sealed using putty.
i.Series Information

Helmer Scientic i.Series® and Horizon Series™Refrigerator - Upright Service and Maintenance Manual
360373/B 9
Chart Recorder (if included)
Notes
• If chart recorder has been operating on battery power, the battery should be replaced to ensure the back-up source has
proper charge.
• For complete information, refer to the Temperature Chart Recorder Operation and Service Manual included with the unit.
The chart recorder has a back-up battery system, enabling a period of continuous operation if power is lost. Battery life varies
by manufacturer as well as voltage level remaining. Providing full power is available, back-up power for the temperature chart
recorder is available for up to 14 hours.
Prior to use:
Place probe in bottle with primary monitor probe.
Set up and Operation
Access chart recorder by pressing and releasing the door to open.
i.Series chart door
Install Battery
Connect the leads to the battery to provide back-up power to the chart recorder.
Install / Replace Chart Paper
Notes
• For accurate temperature reading, ensure the current time is aligned with the time line groove when chart knob is tightened.
• Contact Helmer Customer Service to reorder chart paper; part number 220366 (52 sheets)
Chart recorder stylus and time line groove
1. Press and hold C button. When stylus begins to move left, release button. The LED ashes.
2. When stylus stops moving, remove chart knob then move knob up and away.
3. Place chart paper on chart recorder.
4. Gently lift stylus and rotate paper so current time line corresponds to time line groove.
5. Hold chart paper in place while making sure the chart knob is fully tightened. (Failure to fully tighten the knob can result in paper
slipping and losing time.)
6. Press and hold C button. When stylus begins to move right, release button.
7. Conrm stylus is marking on paper and stops at the correct temperature.
8. Calibrate chart recorder to match primary temperature if needed and close recorder door.
i.Series Information

Helmer Scientic i.Series® and Horizon Series™Refrigerator - Upright Service and Maintenance Manual
360373/B 10
External Monitoring Devices
The remote alarm interface is a relay switch with three terminals:
♦Common (COM)
♦Normally Open (NO)
♦Normally Closed (NC)
Terminals are dry contacts and do not supply voltage. Interface circuit is either normally open or normally closed, depending on
terminals used.
Requirements for your alarm system determine which alarm wires must connect to terminals.
CAUTION
• The interface on the remote alarm monitoring system is intended for connection to the end user’s central alarm
system(s) that uses normally-open or normally-closed dry contacts.
• If an external power supply exceeding 33 V (RMS) or 70 V (DC) is connected to the remote alarm monitoring system’s circuit,
the remote alarm will not function properly and may cause damage to the control board or result in injury to the user.
The terminals on the remote alarm interface have the following maximum load capacity:
♦0.5 A at 125 V (AC)
♦ 1 A at 250 V (DC)
Connect to Remote Alarm Interface
1. On the electrical box, locate the remote alarm terminals.
2. Connect remote alarm wires to appropriate terminals, according to requirements for your alarm system.
3. Use a cable tie to relieve strain on alarm wires (as necessary).
2.5 CongureStorage
CAUTION
• Before moving drawers, ensure they are completely empty for safe lifting.
• Maximum basket, drawer, or shelf load is 100 lbs (46 kg).
Note
Before moving storage components, protect stored items in refrigerator from extended exposure to adverse temperature.
Product Loading Guidelines
When loading your refrigerator, take care to observe the following guidelines:
♦ Never load refrigerator beyond capacity.
♦ Always store items within shelves, drawers or baskets.
♦ Temperature uniformity is maintained by air circulation, which could be impeded if unit is overlled, particularly at the
top or back. Ensure proper clearance is provided below the fan.
Note
Products stacked against back wall may obstruct air ow and affect performance of unit.
i.Series Information

Helmer Scientic i.Series® and Horizon Series™Refrigerator - Upright Service and Maintenance Manual
360373/B 11
Drawers and Baskets
Remove Drawer or Basket
1. Pull drawer or basket out until it stops.
2. On the right rail, locate the release tab and press downward.
3. While holding the right release tab downward, locate the release tab on the left rail and press upward.
4. Pull drawer or basket free of the slides.
Install Drawer or Basket
1. Align end guides on drawer or basket with the slides.
2. Gently push drawer or basket into chamber until it stops.
3. Pull drawer or basket out until it stops; check for smooth operation.
Move Drawer Slides
1. Using a screwdriver, remove front bracket retainers.
2. Tap front brackets upward to disengage standards.
3. Remove slides from standards.
4. Insert slides into standard at appropriate height.
5. Tap front brackets downward to engage standards.
6. Using a screwdriver, install front bracket retainers.
Shelves
Remove Shelf
1. With one hand, lift front edge of the shelf from the front brackets.
2. With the other hand, reach under the shelf and bump rear edge of the shelf upward to disengage rear brackets.
Install Shelf
1. Insert shelf into chamber, placing it on brackets.
2. Gently bump rear edge of the shelf downward to engage brackets.
3. Pulling shelf forward gently; shelf should not disengage from rear brackets
Move Shelf Brackets
1. Using a screwdriver, remove front bracket retainers.
2. Tap front brackets upward to disengage standards.
3. Remove front brackets from standards.
4. Insert front brackets into standard at appropriate height.
5. Tap front brackets downward to engage standards.
6. Using a screwdriver, install front bracket retainers.
2.6 Optional Adapter Kits for Medication Dispensing Locks
Contact Helmer Technical Service or your distributor for service documentation pertaining to medication dispensing locks.
i.Series Information

Helmer Scientic i.Series® and Horizon Series™Refrigerator - Upright Service and Maintenance Manual
360373/B 12
3 Controls
i.Series models are equipped with the i.C3 monitoring and control system. The i.C3system combines temperature control and
monitoring into a single user interface.
Note
Please refer to the i.C3User Guide for complete information regarding the i.C3User Interface.
3.1 Home Screen and Screensaver
The Home Screen is the default screen and is displayed when:
♦ The Home icon is touched from any other screen.
♦ There is no interaction for two minutes on most screens other than those used to enter a password.
The Screensaver is automatically displayed after 2 minutes of inactivity on the Home Screen.
Home Screen Screensaver
3.2 Home Screen Functions
Note
Refer to the i.C³ User Guide for options available on all i.C³ screens.
♦View current interior cabinet temperature readings
♦ View min/max temperature occurrence for a specied time period
♦View the current system time and date
♦ Access any of the ve homescreen applications (touch i.C³ APPS for additional applications)
♦ View information about current alarm events
♦View whether the monitoring system is running on battery power
♦Mute audible alarms
♦ Turn the chamber light on and off
♦View a graph of the chamber temperature
♦ View unit ID
♦ Shortcut to Event Log
i.Series Information

Helmer Scientic i.Series® and Horizon Series™Refrigerator - Upright Service and Maintenance Manual
360373/B 13
3.3 Alarm Reference
If an alarm condition is met, an alarm activates. Some alarms are visual only; others are visual and audible. Some alarms are
sent through the remote alarm interface. The table below indicates if an alarm is audible (A), visual (V), or sent through the remote
alarm interface (R).
Table 2. i.Series Alarm Reference
Alarm Alarm Type Alarm Alarm Type
High Temperature A, V, R Low Battery V
Low Temperature A, V, R No Battery A, V, R
Compressor Temperature A, V, R Probe Failure A, V, R
Door Open (Time) A, V, R Communication Failure A, V, R
Power Failure A, V, R
3.4 Settings
>
Through the i.C³ monitoring and control system, current settings may be viewed and changed. To view settings, touch i.C³ APPS,
Settings. Use a touch-drag motion to scroll up or down to select the desired setting.
Settings screens
Notes
• If the Settings screen is password protected enter appropriate password. If viewing settings for the rst time, enter factory
default password of “1234”.
• Default values for general settings, alarm settings, and display settings are available in the i.C³ User Guide.
• Changing temperature settings affects operation of the refrigerator. Do not change settings unless instructed in product
documentation or by Helmer Technical Service.
The i.C³ temperature monitor and controller is programmed at the factory. To change a setting, rst enter the Settings screen, then
select the setting. The method for accessing the Settings mode for each setting varies.
i.Series Information

Helmer Scientic i.Series® and Horizon Series™Refrigerator - Upright Service and Maintenance Manual
360373/B 14
Device Control Settings
Device control settings are programmed at the factory. Setpoints can be viewed and changed through the i.C³ monitoring and control
system. To view temperature setpoints, touch i.C³ APPS, Settings, Device Control Settings.
Device Control Settings screen.
Table 3. Setpoints
Setting Initial Factory Value
Temperature Setpoint 4.0 °C
Hysteresis Setpoint 2.0 °C (111)*
1.0 °C (120, 125)
1.5 °C (245, 256)
Delay on Start-Up 2 minutes
Control Relay Probe Error Duty Cycle 50%
*Hysteresis for 11 cu ft units prior to serial number 2044369 in low humidity mode = 0.8 ˚C.
Temperature Setpoint
The setpoint is the temperature at which the unit operates.
Notes
• If the Settings screen is password protected enter appropriate password. If viewing settings for the rst time, enter
factory default password of “1234”.
• Temperature Setpoint can be adjusted through the main Settings screen and Device Control Settings.
• Change the setpoint if your organization requires a chamber temperature other than 4.0 °C.
Change Temperature Setpoint
1. Touch i.C³ APPS, i.C³ Settings.
2. Enter the Settings password.
3. Touch minus (–) or plus (+) on the Temperature Setpoint spin box.
Hysteresis Setpoint
Hysteresis is the allowable temperature variance on each side of the refrigerator setpoint.
Delay on Start-Up
Compressor startup is delayed to allow the i.C³ monitoring and control system to start rst.
Control Relay Probe Error Duty Cycle
The duty cycle is the percentage of time the compressor will run in the event of a temperature control failure.
Note
Hysteresis, Delay on Start-up and Control Relay Probe Error Duty Cycle are factory-preset and should not be changed
unless directed by Helmer Technical Service.
i.Series Information

Helmer Scientic i.Series® and Horizon Series™Refrigerator - Upright Service and Maintenance Manual
360373/B 15
UserCongurableAlarmSettings
The following alarm settings may be changed by the operator. The setpoint for temperature alarms may be changed (where
applicable), as well as the time delay between when the alarm condition commences and when the visual and audible alarms
are initiated.
Table4.UserCongurableAlarms
Alarm Description Default Value Default Time Delay
Primary Monitor Probe High Temp High temperature at which alarm condition occurs 5.5 °C 0 minutes
Primary Monitor Probe Low Temp Low temperature at which alarm condition occurs 1.5 °C (blood bank refrigerators)0 minutes
2.0 °C (laboratory and pharmacy refrigerators)
Compressor High Temp High temperature at which alarm condition occurs 50 °C 0 minutes
Power Failure Time after power failure occurs until alarm sounds - 1 minute
Probe Failure Time after probe failure occurs until alarm sounds - 0 minutes
Door Open (Time) Time door remains open until alarm sounds - 3 minutes
Secondary Monitor Probe
High Temp (if installed)
High temperature at which alarm condition occurs 5.5 °C 0 minutes
Secondary Monitor Probe
Low Temp Low temperature at which alarm condition occurs 1.5 °C (blood bank refrigerators)0 minutes
2.0 °C (laboratory and pharmacy refrigerators)
Alarm setting screens
Change an Alarm Setting:
1. Touch i.C³ APPS, Settings.
2. Enter the Settings password (default password is “1234”).
3. Scroll down and touch Alarm Settings.
4. Touch the minus (-) or plus (+) on the corresponding Setpoint spin box to change an alarm setpoint.
5. Touch the minus (-) or plus (+) on the corresponding Time Delay spin box to change the time delay duration.
6. Touch Home to exit the Alarm Settings screen.
i.Series Information

Helmer Scientic i.Series® and Horizon Series™Refrigerator - Upright Service and Maintenance Manual
360373/B 16
Non-CongurableAlarms
The following alarms indicate operational conditions which require the attention of the operator or a qualied service technician.
Table5.Non-CongurableAlarm
Alarm Description
Low Battery Rechargeable battery voltage is low
Communication Failure Communication Failure 1
• Triggered if communication is lost between i.C³ display board and control board
• Unit will continue to run with previously saved settings
• Screen will not display temperature changes or alarm conditions
• i.C³ system will continue to reset until connection is re-established
Communication Failure 2
• Triggered if communication is lost between i.C³ display board and internal system memory
• Unit will continue to run with previously saved settings
Communication Failure 3
• Triggered if the database is corrupted
• The database is archived and a new database is automatically created
• Unit will continue to run with previously saved settings
i.Series Information

Helmer Scientic i.Series® and Horizon Series™Refrigerator - Upright Service and Maintenance Manual
360373/B 17
3.5 Sensor Calibration
>
Sensor calibration values are programmed at the factory. Calibration values can be viewed and changed through the i.C³
monitoring and control system. To view calibration settings, touch i.C³ APPS, Settings, and scroll down to Sensor Calibration.
Settings screen
Sensor Calibration screens
Notes
• If the Settings screen is password protected enter appropriate password. If viewing settings for the rst time, enter factory
default password of “1234”.
• After one hour of no interaction, the Home screen or Temperature Graph screensaver (if enabled) is displayed.
• The Compressor Probe offset is factory-preset and should not be changed unless directed by Helmer Technical Service.
Primary and Secondary Monitor Probes
Verify primary and secondary monitor probes are reading chamber temperature correctly by comparing probe readings to the
temperature measured by a calibrated reference thermometer. If the probes are not reading correctly, change the value displayed on
the monitor.
The factory default setting for the primary monitor and secondary probes is 4.0°C.
Notes
• Ensure product simulation bottle is full of solution.
• Probes in the bottles are connected to the monitoring system and sense chamber temperature. These probes activate
the temperature alarms but do not affect refrigerator setpoint.
i.Series Information

Helmer Scientic i.Series® and Horizon Series™Refrigerator - Upright Service and Maintenance Manual
360373/B 18
Calibrate Primary Monitor Probe:
1. Remove primary monitor probe from the upper probe bottle.
2. Unscrew the cap from the bottle.
3. Attach a calibrated independent reference thermometer traceable per national standards to the primary monitor probe,
and place them in the bottle. The probe and thermometer should be immersed at least 2” (50 mm).
4. Close the door and allow the chamber temperature to stabilize.
5. Observe and note the thermometer temperature. If the independent thermometer corresponds to the displayed
temperature, proceed to Step 9.
6. Subtract the displayed temperature reading from the independent probe reading to determine the offset value.
7. Touch, i.C³ APPS, Settings, Sensor Calibration.
8. Touch minus (-) or plus (+) on the corresponding spin box to increase or decrease the value by the value calculated
in Step 6. The message “New Setting Saved” appears next to the spin box.
9. Remove thermometer from probe.
10. Replace bottle cap, ensuring a tight t.
11. Place probe in bottle, immersing at least 2” (50 mm).
Calibrate Secondary Monitor Probe:
1. Remove secondary monitor probe from the lower probe bottle.
2. Unscrew the cap from the bottle.
3. Attach a calibrated independent reference thermometer traceable per national standards to the secondary monitor
probe, and place them in the bottle. The probe and thermometer should be immersed at least 2” (50 mm).
4. Close the door and allow the chamber temperature to stabilize.
5. Observe and note the thermometer temperature. If the independent thermometer corresponds to the displayed
temperature, proceed to Step 9.
6. Subtract the displayed temperature reading from the independent probe reading to determine the offset value.
7. Touch, i.C³ APPS, Settings, Sensor Calibration.
8. Touch minus (-) or plus (+) on the corresponding spin box to increase or decrease the value by the value calculated
in Step 6. The message “New Setting Saved” appears next to the spin box.
9. Remove thermometer from probe.
10. Replace bottle cap, ensuring a tight t.
11. Place probe in bottle, immersing at least 2” (50 mm).
i.Series Information

Helmer Scientic i.Series® and Horizon Series™Refrigerator - Upright Service and Maintenance Manual
360373/B 19
Control Probe
The temperature controller senses unit cooler temperature through the control probe in the unit cooler. The unit cooler temperature
typically varies from the chamber temperature, so an offset value is used by the control system to compensate for the difference.
The temperature controller adjusts chamber temperature around the refrigerator setpoint by activating the compressor when the
control probe registers above the setpoint based on the hysteresis value.
Determine Control Probe Offset:
NOTICE
• Monitor temperature must be veried and accurate prior to adjusting the Control Probe Offset.
1. View and record the refrigerator setpoint.
2. Allow the unit to run with calibrated monitor temperature for several compressor cycles, and record the average
monitor temperature.
3. View and record the current Control Offset value.
4. Subtract the refrigerator setpoint from the average monitor temperature and record the difference.
5. Add the current Control Offset value to the recorded difference determined in the previous step to establish the new
Control Offset value.
Example 1 Example 2
Refrigerator setpoint is 4.0 Refrigerator setpoint is 4.0
Average monitor temperature is 5.2 Average monitor temperature is 2.8
Current Control Offset is 0.3 Current Control Offset is 0.3
Subtract: 5.2 - 4.0 = 1.2; difference between average temperature
and setpoint. Subtract: 2.8 - 4.0 = -1.2; difference between average temperature and setpoint.
Add: 0.3 + 1.2 = 1.5; new control offset value Add: 0.3 + (-1.2 )= -0.9; new control offset value
Enter New Offset Value:
1. Touch i.C³ APPS, Settings.
2. Enter the Settings password.
3. Touch Sensor Calibration.
4. Touch minus (-) or plus (+) on the Control Probe Offset spin box.
♦ Raise the offset value to lower chamber temperature; lower the offset value to raise chamber temperature.
5. Touch Home to return to home screen.
Compressor Probe
The compressor temperature probe has been factory-calibrated. Changing the calibration settings is not typically necessary and
should not be performed unless directed by Helmer Technical Service.
i.Series Information