Fisher Scientific Isotemp Basic -86C User manual

Isotemp Basic -86C Freezers
Installation and Operation Manual
7028953 Rev. 1
© 2013 Fisher Scientific Inc.
All rights reserved
Printed in U.S.A.
Isotemp

Fisher Scientific
Preface
Isotemp Basic i
MANUAL NUMBER 7028953
1 30775/30673/FR-2607 2/4/14 Intended use and battery check - pgs ii & 4-5 ccs
0 30643 12/17/13 Release 9 - Oil and breaker - refrigeration schematics ccs
REV ECR/ECN DATE DESCRIPTION By
Catalog
Number Model Capacity (cu. ft.) Voltage
IE1386V 8953 13 230/50
IE1386D 8954 13 230/60
IE1386A 8955 13 120/60
IE1786A 8956 17 120/60
IE1786D 8957 17 230/60
IE1786V 8958 17 230/50
IE2386V 8959 23 230/50
IE2386D 8963 23 230/60
IE2386A 8964 23 120/60
Packing List
Part Number Description Quantity
122005 Key 2
380520 Neoprene Cap 2
510016 1/4-20 x 5-1/2” Bolt 2
195763 Retaining Clip 1
370563 Remote Alarm Connector 1
Important installer and user information:
A redundant temperature sensing device has been included in this ULT
freezer. This device is a type “T” thermocouple. For convenient access,
the thermocouple (Figure 1-3) terminates in an interconnect jack (Figure
1-5) behind the base front cover. (May be located differently in chests.
See Section 1.) It is strongly recommended that this thermocouple be
attached to a redundant 24 hour 7 day monitoring system with alarm
capabilities. Connecting the sensor to a monitoring and alarm system
separate from the freezer provides the utmost in product safety, should
the integral system fail. s

Fisher Scientificii Isotemp Basic
Preface
Important Read this instruction manual. Failure to read, understand and follow the instructions in this manual
may result in damage to the unit, injury to operating personnel, and poor equipment performance. s
Caution All internal adjustments and maintenance must be performed by qualified service personnel. s
Material in this manual is for information purposes only. The contents and the product it describes are subject
to change without notice. Fisher Scientific makes no representations or warranties with respect to this manual.
In no event shall Fisher be held liable for any damages, direct or incidental, arising out of or related to the use
of this manual.
The -86C Freezers (see page i for specific list of models) described in this manual are high performance units
which can be used for research and in situations that directly support medical applications. When these
products are used to support a medical application, it is an accessory to a medical device and is therefore
considered as a medical device in its own right by the regulatory body (e.g. FDA).
This product is intended for use:
• As cold storage in research use.
• As a medical device for diagnostic use (storage of samples not intended to be re-introduced to human body).
Registration: This medical application is considered a Class I medical device by the FDA. This product is
classified as product code – JRM, regulation number 862.2050 and is considered a Class 1 device, 510(K)
exempt.

Fisher Scientific Isotemp Basic iii
Preface
Important operating and/or maintenance instructions. Read the accompanying text carefully.
Potential electrical hazards. Only qualified persons should perform procedures associated with this
symbol.
Equipment being maintained or serviced must be turned off and locked off to prevent possible injury.
Hot surface(s) present which may cause burns to unprotected skin, or to materials which may be
damaged by elevated temperatures.
Marking of electrical and electronic equipment, which applies to electrical and electronic equipment
falling under the Directive 2002/96/EC (WEEE) and the equipment that has been put on the market
after 13 August 2005.
This product is required to comply with the European Union’s Waste Electrical & Electronic
Equipment (WEEE) Directive 2002/96/EC. It is marked with the WEEE symbol. Fisher Scientific
has contracted with one or more recycling/disposal companies in each EU Member State European
Country, and this product should be disposed of or recycled through them. Further information on
Fisher’s compliance with this directive, the recyclers in your country and information on Fisher
products will be available at www.fishersci.com.
4Always use the proper protective equipment (clothing, gloves, goggles, etc.)
4Always dissipate extreme cold or heat and wear protective clothing.
4Always follow good hygiene practices.
4Each individual is responsible for his or her own safety.

Fisher Scientificiv Isotemp Basic
Preface
Do You Need Information or Assistance
on Fisher Scientific Equipment?
The Fisher Scientific Sales Group can provide information on pricing and give you
quotations. We can take your order and provide delivery information on major equipment items or
make arrangements to have your local sales representative contact your. Our products are listed on
the internet and we can be contacted through our Internet home page.
1-800-766-7000 Customer Service
www.fishersci.com To order online
Fisher Scientific Product Service Support can supply technical information about proper
setup, operation or troubleshooting of your equipment. We can fill your needs for replacement parts
or provide you with on-site service. We can also provide you with a quotation on our Extended
Maintenance Program for our products.
Whatever products you need or use, we will be happy to discuss your applications. If you are
experiencing technical problems, working together, we will help you locate the problem and, chances
are, correct it yourself...over the telephone without a service call.
When more extensive service is necessary, we will assist you with direct factory trained
technicians or a qualified service organization for on-the-spot repair. If your service need is covered
by the Fisher Scientific Products warranty, we will arrange for the unit to be repaired at our expense
and to your satisfaction.
Regardless of your needs, professional service technicians are available by telephone to assist
you concerning our products Monday through Friday from 8:00 a.m. to 6:00 p.m. Eastern Time.
Please call or fax us at:
1-800-766-7000 Customer Service
1-800-926-1166 Orders Fax
International customers, please contact your local Fisher Scientific distributor.

Isotemp Basic vFisher Scientific
Table of Contents
Installation and Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Control Panel Keys, Displays/Indicators . . . . . . . . . . . . . . . . . . . . . . .1-3
Keypad Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Install Freezer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Choose the Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Install the Wall Bumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Install the Shelves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Remote Alarm Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Attach the Power Cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Connect the Unit to Electrical Power . . . . . . . . . . . . . . . . . . . . . . .1-6
Freezer Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Set the Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Set the High Temperature Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Set the Low Temperature Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
Run Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
Calibrate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Calibrate the Control Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
High Stage System Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Probe Failure Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Clean the Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Clean the Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Clean Water-cooled Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Defrost the Chamber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Prepare the Unit for Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Clean the Door Gasket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Clean Vacuum Relief Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
Replace the Battery(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
Check the Battery(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6
Section 1
Section 2
Section 3
Section 4

vi Isotemp Basic Fisher Scientific
Factory Installed Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
BUS-Back-Up System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Install Injection Assembly, Vent Stack and Solenoid . . . . . . . . . . . .5-1
Install the Temperature Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3
Connect the Probe/Solenoid Harness . . . . . . . . . . . . . . . . . . . . . . .5-4
BUS Operation and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . .5-5
BUS Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-5
Configure the Optional BUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-5
Set the Optional BUS Set Point . . . . . . . . . . . . . . . . . . . . . . . . . . .5-6
Test BUS Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-6
Clean the Vent Stack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-6
Disconnect the Fitting Assembly/Transfer Hose . . . . . . . . . . . . . . .5-7
Chart Recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-7
Install the Chart Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-7
Change the Recorder Temperature Range . . . . . . . . . . . . . . . . . . . .5-7
Calibrate the Chart Recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-8
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Warranty
Appendix
Declarations of Conformity
Table of Contents
Section 5
Section 6

Figure 1-1
• Control Panel - keypad,
displays and indicators.
• BUS (Optional Back Up
System) panel.
• Optional temperature
recorder - 7 day, one pen
or Datalogger.
• Vacuum relief port cover
plate
Figure 1-2
• Remote alarm contacts.
• Power Inlet for power cord connection.
• Optional BUS connections for probe and solenoid.
• Power Switch (mains disconnect).
Isotemp Basic 1-1Fisher Scientific
Section 1 Installation and Start-Up
Figure 1-1. Front View
Optional Back-up
System Connections
Power Switch
(mains
disconnect)
Power Inlet
Remote Alarm
Contacts
Wall Bumper
(pre-tapped holes)
Figure 1-2. Rear View

1-2 Isotemp Basic Fisher Scientific
Section 1
Installation and Start-Up
Figures 1-3 and 1-4
• Vacuum relief port - pressure equal-
ization port.
• Probe cover - houses control, optional
recorder, datalogger or other accessory
probes.
Figure 1-5
• Battery mounting bracket(s)
• Battery power switch (freezer and
BUS)
• Freezer battery
• Optional BUS battery
• Freezer filter location
Shelf
Bracket
Sealant
(Caution: This is a critical seal.
Seal must be maintained.)
Optional - Recorder Probe/Datalogger Probe
Control RTD/Redundant Type T
Thermocouple Probe
Optional Miscellaneous Accessories Probe
Figure 1-3. Chamber Probe
Vacuum
Relief Port
Figure 1-4. Vacuum Relief and
Probe Cover Location
Probe Cover
O
Battery power
switch To
remove filter
Thermocouple
interconnect jack
Battery mounting
bracket
Freezer battery
and optional BUS battery
Figure 1-5. Battery(s) Location and Switch

Isotemp Basic 1-3Fisher Scientific
Section 1
Installation and Start-Up
Temperature
Display
Mode
Key
Alarm
Indicator
Silence
Key
Alarm
Panel
Up and Down
Arrows Enter Key
Figure 1-6. Control Panel
Refer to Figure 1-6 for the items indicated.
•Temperature Display - Displays temperature in degrees Celsius.
•Mode Select Switch - Used to select Run, Set Temperature, Set High
Alarm, Set Low Alarm, Calibrate, Backup.
•Alarm Indicator - Light pulses on/off during an alarm condition of the
cabinet.
•Silence - Silences the audible alarm.
•Alarm Panel - indicates the current alarm condition.
•Up and Down Arrows - Increases or decreases values, toggles between
choices.
•Enter - Stores the value into memory.
This Isotemp freezer has five basic modes which allow freezer setup and
operation. Press the Mode key to scroll through the mode selections.
Up Arrow: Increases or toggles the parameter value.
Enter: Must press Enter key to save to memory all changed values.
Down Arrow: Decreases or toggles the parameter value.
Silence Key: Press to silence the audible alarm. See Section 3 for alarm
ringback times.
Control Panel Keys,
Displays/Indicators
Keypad Operation

Caution If tipped more than 45°, allow the unit to set upright for 24 hours
before start up. s
To remove the freezer from the pallet, use the 7/16" wrench to remove all
the bolts securing the shipping bracket to the pallet.
Remove the shipping bracket. Remove the ramp boards from the pallet and
place the slotted end over the ramp brackets on the pallet. The support
blocks on the ramps will be facing down. Before moving the freezer, make
sure the casters are unlocked and moving freely. Align the caster with the
ramp boards. Use adequate personnel to roll the freezer off the pallet.
The freezer can be easily pushed to the desired approved location,
described in the following section. If necessary, the doors and lower front
panel may be opened to move the unit through tight openings. When the
freezer is in position, set the front caster brakes.
Caution The freezer must not be moved with the product load inside. s
Caution For proper ventilation and airflow, minimum clearance of 5” at
the rear and top and clearance of 8” on the side of the freezer is required.
Allow adequate space on freezer front for door opening. s
Locate the freezer on a firm, level surface in an area with an ambient
temperature between 18°C and 32°C. Provide ample room to reach the
mains disconnect switch (power switch) located on the rear of the freezer.
The parts bag, located inside the cabinet, contains the following parts.
Install the bolts into the pre-tapped holes on the back of the compressor
section. Install a neoprene cap on each bolt. Refer to Figure 1-2 for the
locations of the pre-tapped holes.
1-4 Isotemp Basic Fisher Scientific
Section 1
Installation and Start-Up
Install Freezer
Choose the Location
Install the Wall Bumpers
Quantity Stock # Description Purpose
2510016 1/4-20 x 5-1/2” Bolt Wall Bumper
2380520 Neoprene Cap Cap Protector

Install the shelf clips into the shelf pilasters (front and back) at the desired
shelf level. Install the shelves in the cabinet onto the clips.
Note Maximum shelf load is 100 lbs (45.4 kg) per shelf. s
Note On units having the optional 5 inner door option, refer to the
instructions accompanying the inner door kit. s
See Figure 1-2 for the location of the remote alarm contacts. The remote
alarm connector is located in the parts bag provided with the manual. It
must be installed if connecting the freezer to an alarm system. After
installing the wiring from the alarm system to the connector, install the
connector to the freezer microboard and secure with the two screws
provided. The remote alarm provides a NO (normally open) output, a NC
(normally closed) output and COM (common). The contacts will trip on a
power outage, high temperature alarm or low temperature alarm. They aill
also trip on high stage, control probe or microboard failure. Figure 1-8
shows the remote contacts in alarm state.
Insert the power cord into the
power inlet module. Place the
retaining bracket (P/N 195763)
over the connector. Tighten
retaining screws to secure.
Isotemp Basic 1-5Fisher Scientific
Section 1
Installation and Start-Up
Install the Shelves
Remote Alarm Contacts
Figure 1-8. Remote Alarm Contacts
IMPORTANT USER INFORMATION
IMPORTANT USER INFORMATION
Caution! Stored product should be protected
by a redundant 24 hour/day monitoring
system with alarm capability. An interconnect
jack and thermocouple are installed
for centralized monitoring should on-board
system fail.
Attach the Power Cord
Figure 1-9. Power Cord Connection

Note See the serial tag on the side of the unit for electrical specifications,
or refer to the electrical schematics in this manual. s
The freezer should be operated on a dedicated grounded service. Check the
voltage rating on the serial tag of the unit and compare it with the outlet
voltage. Then, with the power switch turned off, plug the line cord into
the wall outlet.
First, turn on the freezer power switch. Then open the lower front door by
grasping the bottom left corner. Locate the battery switch (Figure 1-5) and
turn it to Standby mode ( ). During initial freezer start-up, the system
battery may require charging and the Low Battery indicator may
illuminate.
Caution Ensure the battery switch is turned to Standby mode ( ). The
rechargeable batteries require 36 hours to charge at initial start-up. A “Low
Battery” alarm may occur until the batteries are fully charged. Should a
power failure occur during the initial start-up period, the electronics will
have limited operation. s
With the freezer properly installed and connected to power, system set
points can be entered. The following set points can be entered in Settings
mode: control temperature, high temperature alarm set point, low
temperature alarm set point, and (optional) BUS set point. Default settings
are shown in the table below.
Caution If the set point is changed and the low temperature and high
temperature alarms are set 10° from the set point, the alarm set points will
adjust automatically to maintain a distance of at least 10° from set point. s
1-6 Isotemp Basic Fisher Scientific
Section 1
Installation and Start-Up
Connect the Unit to
Electrical Power
Freezer Start-Up
Control Set Point -80°C
High Temperature Alarm -70°C
Low temperature alarm -90°C
Optional BUS Set Point -60°C

All Isotemp Basic freezers have an operating temperature range of -50°C to
-86°C, depending on ambient temperature. The freezer is shipped from the
factory with a temperature set point of -80°C. To change the operating
temperature set point:
1. Press the Mode key until the Set Temperature indicator lights.
2. Press the up/down arrow key until the desired temperature set point is
displayed.
3. Press Enter to save the set point.
4. Press the Mode key until the Run indicator lights for Run mode
If no keys are pressed, the freezer will automatically return to RUN mode
after 5 minutes.
The high temperature alarm will activate an audible/visual warning when
the freezer chamber temperature has reached or exceeded the high
temperature alarm set point. To set the high temperature alarm set point:
1. Press the Mode key until the Set High Alarm indicator lights.
2. Press the up or down arrow key until the desired high temperature
alarm set point is displayed.
3. Press Enter to save the setting.
4. Press the Mode key until the Run indicator lights for Run mode
If no control keys are pressed, the freezer will automatically return to RUN
mode after 5 minutes.
Note The high alarm set point must be set at least 5°C from the control
set point. s
Note At initial start-up, the high temperature alarm is disabled until the
cabinet reaches set point or 12 hours elapse. s
Isotemp Basic 1-7Fisher Scientific
Section 1
Installation and Start-Up
Set the Operating
Temperature
Set the High Temperature
Alarm

The low temperature alarm will activate an audible/visual warning when
the freezer chamber temperature has reached or decreased below the low
temperature alarm set point. To set the low temperature alarm set point:
1. Press the Mode key until the Set Low Alarm indicator lights.
2. Press the up or down arrow key until the desired low temperature
alarm set point is displayed.
3. Press Enter to save the setting.
4. Press the Mode key until the Run indicator lights for Run mode
If no control keys are pressed, the freezer will automatically return to RUN
mode after 5 minutes.
Note The low alarm set point must be set at least 5°C from the control set
point. s
Run mode is the default mode for the freezer. This mode will display the
cabinet temperature on the temperature display under normal operating
conditions. In addition, Run mode allows display of the high stage heat
exchange temperature.
This information is scrolled by pressing the up or down arrow keys. The
display will return to the operating temperature in 10 seconds if no keys
are pressed.
1-8 Isotemp Basic Fisher Scientific
Section 1
Installation and Start-Up
Set the Low Temperature
Alarm
Run Mode

Isotemp Basic 2-1Fisher Scientific
Section 2 Calibrate
Once the freezer has stabilized, the control probe may need to be
calibrated. Calibration frequency is dependent on use, ambient conditions
and accuracy required. A good laboratory practice would require at least an
annual calibration check. On new installations, all parameters should be
checked after the stabilization period.
Caution Before making any calibration or adjustments to the unit, it is
imperative that all reference instruments be properly calibrated. s
Plug a type T thermocouple reader into the receptacle located inside the
lower door (Figure 1-5). Compare the control temperature set point to the
temperature of the measuring device.
1. Press the Mode key until the Calibrate indicator lights.
2. Press up/down arrow to match the display to calibrated instrument.
3. Press Enter to store calibration.
4. Press the Mode key to return to Run mode.
Temperature Stabilization Periods
Startup - Allow 12 hours for the temperature in the cabinet to stabilize
before proceeding.
Already Operating - Allow at least 2 hours after the display reaches set
point for temperature to stabilize before proceeding.
Note During calibration, the temperature display is not available. s
If no keys are pressed for approximately five minutes while in Calibrate
mode, the system will reset to Run mode.
Calibrate the Control
Probe

Isotemp Basic 3-1Fisher Scientific
Section 3 Alarms
The Isotemp Basic freezer alarms are displayed on the freezer control panel.
When an alarm is active, the indicator next to the alarm description lights
and an audible alarm sounds. Press the Silence key to disable the audible
alarm for the ringback period. The visual alarm will continue until the
freezer returns to a normal condition. The alarms are momentary alarms
only. When an alarm condition occurs and then returns to normal, the
freezer automatically clears the alarm condition.
All alarm delays and ringback times are ±30 seconds.
* The automatic battery test runs immediately on initial start-up, then every 8 hours thereafter.
Description Delay Ringback Relay
Power Failure 1 min. 15 min. Yes
High Temperature Alarm 1 min. 15 min. Yes
Low Temperature Alarm 1 min. 15 min. Yes
Probe Failure 1 min. 15 min. No
Door Open 1 min. 15 min. No
Wrong Power 0 min. none Yes
Low Battery* 1 min. 12 hours No
Low BUS Battery (optional) 1 min. 15 min. No
Hot Condenser 1 min. none No
High Stage Failure 0 min. 15 min. Yes
Micro Board Failure 0 min. 15 min. Yes

3-2 Isotemp Basic Fisher Scientific
Section 3
Alarms
The "high stage system failure" condition is created when the high stage
compressor and fans run for 30 minutes and are not capable of cooling the
interstage heat exchanger to the proper temperature. Under this condition,
the high stage compressor and fans turn off after 30 minutes and an
audible and visual alarm occur. The audible alarm can be silenced and will
ringback every 15 minutes.
The microprocessor in Isotemp Basic freezers continually scans all probes
including the control probe, heat exchanger probe and condenser probe to
ensure that they are operating properly. Should an error be detected, the
"Probe Failure" alarm will occur as shown in the table above. If an error is
detected with the control probe, the high and low stage compressors will
run continuously. As a result, the cabinet temperature will decrease until it
reaches the lowest temperature that the refrigeration system can maintain.
If an error is detected with the heat exchanger probe, the freezer will cycle
properly at its temperature set point using a 5 minute step start between
the high and low stage compressors. If an error is detected with the
condenser probe, there is no impact on the performance of the freezer;
however, the hot condenser alarm may also occur. Contact the Technical
Services department or your local distributor.
High Stage System
Failure
Probe Failure Alarm

Isotemp Basic 3-3Fisher Scientific
Section 3
Alarms
Error Notes
Er00
Name: Improper model selected.
Description: Indicates that DIP SW3 has not selected a proper model or can’t be accessed properly.
Response: Display shows “Er00” and will not start-up until a proper model is selected. Contact Technical Services.
ErA1 This error condition will prevent peripherals (fans, compressors, etc.) from powering up with the incorrect voltage.
Name: Voltage/Frequency failure
Description: Indicates the measured RMS line voltage did not agree with the logic level sensed by the micros provided by the
installed high voltage PCB; or the measured RMS voltage is not within a tolerable range (<180 VAC < 270 for 230VAC unit /
<85VAC < 160 for 115VAC unit); or the frequency measured over 10 cycles was not within a tolerable range (55 Hz < Freq < 70 Hz
for 60 Hz units / 40 Hz < Freq < 55 Hz for 50 Hz units)
Response: This condition is checked at power on reset and if it is active, the unit will NOT power up. The unit will indefinitely
display “Er_1” in the display and continue to monitor the frequency and voltage. Furthermore, the audible alarm will sound. Other
startup error messages may be displayed prior to this message; however, the system will stop the startup sequence for this condi-
tion.
ErA1 .. No pulses (zero crossings) detected to determine frequency (50 / 60 Hz)
ErC1 .. Frequency detected is below 50 Hz
Erd1 .. Frequency detected is above 60 Hz (Possible noise spikes on supply voltage)
ErE1 .. Unit is 230V and the voltage detected is below the low limit (180VRMS)
ErF1 .. Unit is 230V and the voltage detected is above the high limit (260VRMS)
Erg1 .. Unit is 115V and the voltage detected is below the low limit (85VRMS)
ErH1 .. Unit is 115V and the voltage detected is above the high limit (160VRMS)
ErC1
Erd1
ErE1
ErF1
Erg1
ErH1
Er02
Name: Control (Cabinet) Sensor Failure
Description: This condition indicates that the control sensor has failed to produce a valid reading for >12 consecutive reads (~60
seconds).
Response: The unit will stage both compressors on (if necessary) and the unit will attempt to head to bottom out. If the sensor
recovers, the system will begin to operate normally and respond to the temperature feedback. The remote alarm contacts will
become active. ‘Er02’ will be added to the main display queue and the last valid cabinet temperature value will not be displayed.
Er03
Name: Heat Exchange Sensor Failure
Description: This condition indicates that the heat exchange sensor has failed to produce a valid reading for >12 consecutive
reads (~60 seconds).
Response: The display will show “Er03” only when the button sequence to read the heat exchange sensor is depressed.