Helmer i Series Installation and user guide

360379/A/C
Refrigerator Service and Maintenance Manual
i.Series®and Horizon Series™ - Pass-Thru
Pharmacy
i.Series
iPR225, iPR456
Horizon Series
HPR225, HPR456
Blood Bank
i.Series
iB225, iB456
Horizon Series
HB225, HB456
360379/D

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 © 2019 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 Part No. 360379/D
Document History
Revision Date CO Supersession Revision Description
A 15 NOV 2016 12321 n/a Initial release (all units with serial number 2035000 and greater).
B 28 MAR 2017 12701 B supersedesA Added Appendix A and B to include compliance and warranty information. Updated
the Emergo address.
C 12 JAN 2018 13333 C supersedes B
• Updated hysteresis data.
•Claried defrost event default settings in Table 7.
•Updated schematics to include changes in Temperature Chart Recorder and
Defrost Timer.
• Added FCC compliance information.
D 6 JUN 2019 14712 D supersedes C Updated text in Sections 2, 4 and 6 to include information regarding the
i.Lock Interlock feature.
* Date submitted for Change Order review. Actual release date may vary.

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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
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
5.2 Replace LED Lamp Strip.....................................................................................27
5.3 Remove / Replace Unit Cooler Cover ........................................................................... 27
6 Troubleshooting ................................................................................................ 29
6.1 General Operation Problems .................................................................................29
6.2 Chamber Temperature Problems .............................................................................. 30
6.3 Alarm Activation Problems ................................................................................... 30
6.4 Testing Problems...........................................................................................31
6.5 Condensation Problems ..................................................................................... 32
7 i.Series®Parts .................................................................................................. 33
8 Schematics .................................................................................................... 36
8.1 iB and iPR Models; 225 and 456 Congurations .................................................................. 36
8.2 iB and iPR Models; 225 and 456 Congurations with i.Lock™ Interlock ................................................ 38

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9 InstallationandConguration ..................................................................................... 39
9.1 Location Requirements......................................................................................39
9.2 Placement and Leveling .....................................................................................39
9.3 Connect Back-Up Power.....................................................................................40
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 ................................................................................... 57
13.4 Condensation Problems ..................................................................................... 58
14 Horizon Series™ Parts ........................................................................................... 59
15 Schematics .................................................................................................... 62
15.1 HB and HPR Models........................................................................................ 62
15.3 Defrost Timer for HPR Model; 225 and 456 Conguration ........................................................... 63
16 Compliance .................................................................................................... 64
16.1 Safety Compliance ......................................................................................... 64
16.2 Environmental Compliance ................................................................................... 64
16.3 EMC Compliance .......................................................................................... 64
Appendix A: Warranty................................................................................................ 65

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1 About this Manual
This manual provides information on i.Series®and Horizon Series™ pass-thru 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, “iB225” refers to an i.Series Blood Bank refrigerator with two doors total (one door on the clean room
side of the unit, and one door on the control side of the unit) and an approximate capacity of 25 cu ft.
Generic references are used throughout this manual to group models that contain similar features. For example, “225 models”
refers to all models of that size (iB225, HB225, iPR225, HPR225). This manual covers all pass-thru 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

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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 Compliance with European Union Directive
WEEE 2002/96/EC applicable provisions.
Caution: Unlock all casters
Safety Precautions
Avoiding Injury
Review safety instructions before installing, using, or maintaining the equipment.
♦ Before moving unit, ensure doors are closed and casters are unlocked and free of debris.
♦ Before moving unit, disconnect the AC power cord and secure the cord.
♦Do not open multiple, loaded drawers at the same time.
♦ Do not move a unit whose load exceeds 900 lbs / 408 kg (225 models) or 1350 lbs / 612 kg (456 models).
♦ Never physically restrict any moving component.
♦ Avoid removing electrical service panels and access panels unless so instructed.
♦Keep hands away from pinch points when closing the door.
♦ Avoid sharp edges when working inside the electrical compartment and refrigeration compartment.
♦Ensure biological materials are stored at recommended temperatures determined by standards, literature, or good
laboratory practices.
♦ Proceed with caution when adding and removing samples from the refrigerator.
♦Use manufacturer supplied power cord only.
♦ Using the equipment in a manner not specied by Helmer Scientic may impair the protection provided by the equipment.
♦Ensure biological materials are stored safely, in accordance with all applicable organizational, regulatory, and legal
requirements.
♦ 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.

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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
225
115V 60 Hz 9.25 A
230V 50 Hz 5.1 A
230V 60 Hz 5.8 A
456
115V 60 Hz 13.25 A
230V 50 Hz 7.8 A
230V 60 Hz 8.2 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 top of the refrigerator next to 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 this specication label varies depending on the model and power requirements.
Sample Product Specication Label
Label Description
A Model (REF)
B Serial number
D Power requirements
B
A
C

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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.
♦ Meets limits specied for ambient temperature (15˚C to 32˚C) and relative humidity.
♦ Minimum 8“ (203 mm) above.
♦ Clearance above the clean room side may be 0”.
♦ Top enclosure cannot be placed more than 11” (280 mm) from the front (clean room side) of the refrigerator.
♦ Side enclosures may be ush with both sides of the refrigerator.
8” MINIMUM
OVERHEAD
CLEARANCE
“CLEAN ROOM”
SIDE
TOP ENCLOSURE CAN NOT
EXTEND MORE THAN 11”
FROM “CLEAN ROOM” SIDE
OF REFRIGERATOR
0” MINIMUM
CLEARANCE
(BOTH SIDES)
CONTROL /
“NON-CLEAN ROOM”
SIDE
0” MINIMUM
OVERHEAD
CLEARANCE
2.2 Placement and Leveling
CAUTION
• To prevent tipping, ensure the casters are unlocked and doors are closed before moving the refrigerator.
♦Roll refrigerator into place and lock casters.
♦ Ensure refrigerator is level.
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 i.Lock™ interlock feature is
available for up to 2 hours.
CAUTION
Before installing or replacing batteries, switch AC power and back-up battery OFF. Disconnect refrigerator from AC power.
Notes
• The optional i.Lock™ interlock feature (available only in Pharmacy models) 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.
i.Series Information

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The back-up battery is located on top of the refrigerator.
Monitoring system back-up battery i.Lock interlock key switch
(supplies power to optional i.Lock interlock)
2.4 Prepare for Monitoring
The back-up battery switch is switched o󰀨 for shipping. Switch the back-up battery switch ON to provide the monitoring system
and optional i.Lock interlock 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 ports, and immersed in existing probe bottles.
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.
Right: Top 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.
i.Series Information

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Chart Recorder (if included)
Note
• 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
Note
• 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

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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 30 V (RMS) or 60 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 30 V (RMS)
♦1.0 A at 24 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 refrigerators 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
against the doors or walls. Ensure proper clearance is provided below the fan.
Note
Products stacked against walls or doors may obstruct air ow and a󰀨ect performance of unit.
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.
i.Series Information

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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

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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 any screen 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 o󰀨
♦View a graph of the chamber temperature
♦View unit ID
♦ Shortcut to Event Log
i.Series Information

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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
Note
• 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 a󰀨ects 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

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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*
Delay on Start-Up 2 minutes
Duty Cycle During Control Probe Error 10%
*Hysteresis for units prior to serial number 2044369 in low humidity mode = 1.5 ˚C.
Temperature Setpoint
The setpoint is the temperature at which the refrigerator operates.
Note
• 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.
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.
Duty Cycle During Control Probe Error
The duty cycle is the percentage of time the compressor will run in the event of a temperature control probe failure.
Note
Hysteresis, Delay on Start-up, and Duty Cycle During Control Probe Error are factory-preset and should not be changed
unless directed by Helmer Technical Service.
i.Series Information

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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 (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 (pharmacy refrigerators)
Alarm Settings screen
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

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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 - Pass-Thru Service and Maintenance Manual
360379/D 17
3.5 Sensor Calibration
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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.
• Compressor Probe o󰀨set is factory-preset and should not be changed unless directed by Helmer Technical Service.
Primary Monitor and Secondary Probes
Verify primary monitor and secondary 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 a󰀨ect refrigerator setpoint.
i.Series Information

Helmer Scientic i.Series® and Horizon Series™ Refrigerator - Pass-Thru Service and Maintenance Manual
360379/D 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 o󰀨set 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 Probe:
1. Remove secondary 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 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 o󰀨set 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 - Pass-Thru Service and Maintenance Manual
360379/D 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 o󰀨set value is used by the control system to compensate for the di󰀨erence.
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O󰀨set:
NOTICE
• Monitor temperature must be veried and accurate prior to adjusting the Control Probe O󰀨set.
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 O󰀨set value.
4. Subtract the Refrigerator Setpoint from the average monitor temperature and record the di󰀨erence.
5. Add the current Control O󰀨set value to the recorded di󰀨erence determined in the previous step to establish the new
Control O󰀨set 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 O󰀨set is 0.3 Current Control O󰀨set is 0.3
Subtract: 5.2 - 4.0 = 1.2; di󰀨erence between average temperature
and setpoint. Subtract: 2.8 - 4.0 = -1.2; di󰀨erence between average temperature and setpoint.
Add: 0.3 + 1.2 = 1.5; new control o󰀨set value Add: 0.3 + (-1.2 )= -0.9; new control o󰀨set value
EntertheNewO󰀨setValue:
1. Touch Home, i.C³ APPS, Settings.
2. Enter the Settings password.
3. Touch Temperature Calibration.
4. Touch minus (-) or plus (+) on the ControlSensorO󰀨set spin box.
♦ Raise the o󰀨set value to lower chamber temperature; lower the o󰀨set value to raise chamber temperature.
5. Touch Home to return to home screen.
Compressor Probe
The compressor 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