VWR 5700 Series Operating instructions

Model 5700 Series
VWR ULT Freezer
Operating and Maintenance Manual 7065702 Rev. 2

VWR International
MANUAL NUMBER 7065702
2 30565/FR-2575 11/15/13 Updated 903 elec schematic, start component enclosure drawing ccs
1 SI-11678 7/15/13 Caster part number from 120086 to 120011 (5702-203-1 dwg) ccs
0 FR-2400 1/25/13 Release 8 - Low low compressor - elec & refrig schematics, expl base dwg ccs
REV ECR/ECN DATE DESCRIPTION By
Preface
Model 5700 Series i
Model Capacity in Cubic Feet Voltage
5702 13 230
5703 13 120
5704 17 120
5705 17 230
5706 23 230
5756 23 120
Part Number Description Quantity
34040 Key Ring 1
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
Packing List
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 thermocou-
ple be attached to a redundant 24 hour 7 day monitoring system with
alarm capabilities. Connecting the sensor to a monitoring and alarm sys-
tem separate from the freezer provides the utmost in product safety,
should the integral system fail.
Models Covered

VWR Internationalii Model 5700 Series
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. VWR International makes no representations or warranties with respect to this manual.
In no event shall VWR be held liable for any damages, direct or incidental, arising out of or related to the use of
this manual.
©2013 VWR International. All rights reserved.

VWR International Model 5700 Series 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. VWR International
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
VWR’s compliance with this directive, the recyclers in your country and information on VWR
products will be available at www.vwrsp.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.

VWR Internationaliv Model 5700 Series
Preface
Do You Need Information or Assistance on
VWR Scientific Products?
The VWR 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.
1-800-932-5000 VWR, Toll Free, US
http://www.vwrsp.com Internet Worldwide Web Home page
The VWR 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 your Forma products.
Whatever VWR or Forma 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
VWR Brand warranty, we will arrange for the unit to be repaired at our expense and to your satisfaction.
Regardless of your needs, VWR support by Thermo's professional telephone technicians is
available to assist you Monday through Friday from 8:00a.m. to 6:30 p.m. Eastern Time. Please call or fax us
at:
If you wish to write, our mailing address is:
Thermo 'JTIFSScientific
401 Millcreek Road, Box 649
Marietta, OH 45750
Sales Group
Product Service Group at Thermo
1-740-373-4763 Direct
1-800-438-4851 Technical Services Toll Free, U.S. and Canada
1-740-373-4189 FAX
Http://www.thermo.com Internet Worldwide Web Home Page
Service E-Mail [e-mail]

Model 5700 Series vVWR International
Table of Contents
Installation and Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Operation of the Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Control Panel Keys, Displays & Indicators . . . . . . . . . . . . . . . . . . . .1-3
Remote Alarm Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Freezer Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Choose the Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Shelf Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Wall Bumper Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Electrical Power Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Power Cord Attachment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Freezer Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Set the Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Set the Low Temperature Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Run Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Calibrate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Calibrate the Control Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
High Stage System Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Probe Failure Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Clean the Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Clean the Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Clean the Water-cooled Condenser . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Clean the Vacuum Relief Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Clean the Door Gasket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Defrost the Chamber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Prepare the Unit for Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
Replace the Battery(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
Section 1
Section 2
Section 3
Section 4

vi Model 5700 Series VWR International
Factory Installed Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Back-Up System (BUS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Install Vent Stack, Solenoid & Injection Ass’y . . . . . . . . . . . . . . . . .5-2
Connect the Probe/ Solenoid Harness . . . . . . . . . . . . . . . . . . . . . . .5-3
Install the Temperature Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3
Configure Optional BUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-5
BUS Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-5
Clean the Vent Stack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-6
Test the BUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-6
Set the Optional BUS Set Point . . . . . . . . . . . . . . . . . . . . . . . . . . .5-6
Disconnect the Fitting Assembly & Transfer Hose . . . . . . . . . . . . .5-7
Chart Recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-7
Change Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-8
Recorder Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-8
Five Inner Door Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-9
Water-cooled Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-9
Datalogger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-9
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Exploded Parts Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
Refrigeration Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1
Electrical Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-1
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-
Handling Liquid Nitrogen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-1
Handling Liquid CO2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-4
Table of Contents
Section 5
Section 6
Section 8
Section 7
Section 9
Section 10
Appendix

Model 5700 Series 1-1VWR International
Section 1 Installation and Start-Up
Vacuum relief
cover plate
Control panel
Optional back-up
system controls
Temperature
recorder (optional)
Vacuum Relief
Port
Chamber Probe
Cover
Optional Back-up
System Connections
Power Switch
(mains
disconnect)
Power Inlet
Remote Alarm
Contacts
Wall Bumper
(pre-tapped holes)
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 1-1
• Control Panel - keypad, displays and indi-
cators.
• 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).
Figures 1-3 and 1-4
• Vacuum relief port - pressure equalization
port.
• Probe cover - houses control, optional
recorder, datalogger, and miscellaneous
accessory probes.
Figure 1-4. Vacuum Relief and Probe Cover Locations
Figure 1-1. Front View
Figure 1-2. Rear View
Figure 1-3. Chamber Probe(s)

1-2 Model 5700 Series VWR International
Section 1
Installation and Start-Up
Figure 1-5
• Battery mounting bracket(s)
• Battery power switch (freezer and BUS)
• Freezer battery
• Optional BUS battery
• Freezer filter location
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
Temperature
Display
Mode
Key
Alarm
Indicator
Mute
Key
Alarm
Panel
Up and Down
Arrows
Enter key
Figure 1-6. Control Panel

Model 5700 Series 1-3VWR International
Section 1
Installation and Start-Up
Figure 1-6
• 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.
• Mute - 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.
The Model 5700 Series 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.
• Mute Key: Press to silence the audible alarm. See Section 4 for alarm
ringback times.
Caution If tipped more than 45°, allow the unit to sit 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. 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.
Control Panel Keys,
Displays & Indicators
Operation of the
Keypad
Freezer Installation

Caution Do not move the freezer with product load inside.
For proper ventilation and airflow, a minimum clearance of 5” at the rear
and top and a clearance of 8” on the side of the freezer is required. Allow
adequate space in the front of the freezer 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.
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 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 trip on a power outage, and high
or low temperature alarm. They will also trip on
high stage, control probe and microboard
failures. Figure 1-7 shows the remote contacts in
alarm state.
1-4 Model 5700 Series VWR International
Section 1
Installation and Start-Up
Freezer Installation
(continued)
Choose the Location
Wall Bumper Installation
Qty Stock # Description Purpose
2510016 1/4-20 x 5-1/2” Bolt Wall Bumper
2380520 Neoprene Cap Cap Protector
Shelf Installation
Remote Alarm Contacts
Figure 1-7. Alarm State
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.

Insert the power cord into the
power inlet module. Place the
retaining bracket (P/N 195763)
over the connector. Tighten
retaining screws to secure.
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.
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 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
Model 5700 Series 1-5VWR International
Section 1
Installation and Start-Up
Power Cord Attachment
Figure 1-8. Power Cord Insertion
Electrical Power
Connection
Freezer Start-Up
Control Set Point -80°C
High Temperature Alarm -70°C
Low temperature Alarm -90°C
Optional BUS Set Point -60°C

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
be adjusted automatically to maintain a distance of at least 10° from set
point. s
The freezer has 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 High alarm setpoint must be set at least 5°C from control setpoint.
At initial start-up, the high temperature alarm is disabled until the cabinet
reaches setpoint or 12 hours elapse. s
1-6 Model 5700 Series VWR International
Section 1
Installation and Start-Up
Freezer Start-Up
(continued)
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 is the default mode for the freezer. This mode shows 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.
Model 5700 Series 1-7VWR International
Section 1
Installation and Start-Up
Set the Low Temperature
Alarm
Run Mode

Model 5700 Series 2-1VWR International
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 will not be available. s
If no keys are pressed for approximately five minutes while in calibration
mode, the system will reset to Run mode.
Calibrate the Control
Probe

Model 5700 Series 3-1VWR International
Section 3 Alarms
The Model 5700 Series freezer alarms are displayed on the freezer control
panel. When an alarm is active, the indicator next to the alarm description
will light and there will be an audible alarm. Press the Mute 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 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 Model 5700 Series VWR International
Section 3
Alarms
Probe Failure Alarm
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 will turn off after 30 minutes and an
audible and visual alarm will occur. The audible alarm can be silenced and
will ring back every 15 minutes.
The microprocessor in Model 5700 Series 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 described 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 VWR Service Department or your local distributor.
High Stage System
Failure

Model 5700 Series 3-3VWR International
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 (< 180VAC < 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.