Structural Concepts Oasis COU2757R User manual

SELF-CONTAINED REFRIGERATED SERVICE / SELF-SERVICE MERCHANDISERS
REV S DATE: 08/22/2022
Model COU2757R
Model COU2757R.3748
Model COU2757R.4031
Model COU2757R.5427
USER MANUALS\99523_OASIS_USER MANUAL_COU2757R_3748_4031_5427_REF_SVC_SELF-SVC_CASE
Model COU2757R Shown
With Product For Illustrative
Purposes Only
SCC P/N
99523
Oasis
READ AND SAVE THESE INSTRUCTIONS
® USER
MANUAL
Structural Concepts Corp. ∙ 888 E. Porter Rd ∙ Muskegon, MI 49441 Phone: [phone] Fax: [phone] ∙ www.structuralconcepts.com

2
TABLE OF CONTENTS
OVERVIEW / TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS / WIRING ……….....………….
SHIPPING SUPPORT REMOVAL / FRONT & REAR GRILLE REMOVAL / REMOVING CASE
FROM SKID ………….....….…………...…...…..…………………………………….…….…………
CASE PLACEMENT / CASTER LOCKING & UNLOCKING OPERATION / START-UP AND
OPERATION …………………………………………………………………………………………….
MAINTENANCE FUNDAMENTALS ….…………...….....……………..………………………….……….…
LIGHT FIXTURES ……………………………………………………………………………………………….
ELECTRICAL & REFRIGERATION FUNDAMENTALS ……...………..…………………….….………….
REFRIGERATION FUNDAMENTALS ………………………………………………………………….……..
SERIAL LABEL LOCATION & INFORMATION LISTED / TECHNICAL INFO & SERVICE …………….
CLEANING SCHEDULE (TO BE PERFORMED BY STORE PERSONNEL) …………………………….
CLEANING SCHEDULE (TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY) .....…..
PREVENTIVE MAINTENANCE - HONEYCOMB AIR DIFFUSERS (TO BE PERFORMED BY
TRAINED SVC. PROVIDERS ONLY) …………………..…………………………………..……….
TROUBLESHOOTING (TO BE PERFORMED BY STORE PERSONNEL) ……………………..……….
TROUBLESHOOTING (TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY) ………..
TROUBLESHOOTING (BY TRAINED SERVICE PROVIDERS ONLY) - CONDENSING SYSTEM …..
TROUBLESHOOTING (BY TRAINED SERVICE PROVIDERS ONLY) - EVAPORATOR SYSTEM ….
ILLUSTRATED PARTS BREAKDOWN - COU2757R ……………………………………………………..
PARTS LIST - COU2757R ……………………………………………………………..……………………...
GENERAL LAYOUT OF CONDENSER PACKAGE ………………………………………………………..
PROGRAMMABLE CONTROLLER INFORMATION………………….…………………………….……....
TECHNICAL SERVICE CONTACT INFORMATION / WARRANTY INFORMATION ……………...……
3-4
5
6
7
8
9
10
11
12
13
14
15-16
17-19
20
21
22
23
24
25
26

3
OVERVIEW
• The upper (service) section of this case is designed to
merchandise packaged/unpackaged, non-hazardous/
hazardous, product at ambient temperatures.
• The lower (self-service) section of this case is
designed to merchandise packaged/unpackaged,
non-hazardous/hazardous, product at 41 °F (5 °C) or
less product temperatures.
• Product must be pre-chilled at 41 °F (5 °C) or less prior
to being placed in refrigerated areas of case.
• Cases should be installed and operated according to
this operating manual’s instructions to ensure proper
performance.
• Improper use will void warranty.
NSF/ANSI TYPE I vs. II ENVIRONMENTAL CONDITIONS
This unit is designed for the display of products in ambient
environmental conditions where temperatures and relative
humidity are maintained within a specific range.
• NSF/ANSI Type I Conditions: Product is displayed in
store conditions with maximum ambient temperature of
75 °F (24 °C) and relative humidity of 55%.
• NSF/ANSI Type II Conditions: Product is displayed in
store conditions with maximum ambient temperature of
80 °F (27 °C) and maximum relative humidity of 55%.
• If unsure if your unit is classified as NSF/ANSI Type I or
Type II, see tag next to serial label on your case.
COMPLIANCE
• Performance issues when in violation of applicable
NEC, federal, state and local electrical and plumbing
codes are not covered by warranty. See below.
WARNINGS
• This page contains important warnings to prevent injury
or death. Please read carefully!
WARNING
Hazardous moving parts. Do not operate unit with covers removed.
Fan blades may be exposed when deck panel is removed.
Disconnect power before removing deck panel.
WARNING
Risk of electric shock. Disconnect power before servicing unit.
CAUTION! More than one source of electrical supply is
employed with units that have separate circuits.
Disconnect ALL ELECTRICAL SOURCES before servicing.
WARNING
Condenser Pan is Hot!
Disconnect or turn off unit and allow to cool
before cleaning or removing from case.
WARNING
ELECTRICAL
HAZARD
WARNING
KEEP
HANDS
CLEAR
WARNING
HOT
SURFACE
COMPLIANCE
This equipment MUST be installed in compliance with
all applicable NEC, federal, state and local
electrical and plumbing codes.
OVERVIEW / TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS / WIRING - PAGE 1 of 2
ATTENTION
CONTRACTORS
WARNING: This product can expose you to chemicals, including
Urethane (Ethyl Carbamate), which are known to the state of
California to cause cancer and birth defects or other reproductive
harm. For more information go to P65Warnings.ca.gov.

CAUTION
4
OVERVIEW / TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS / WIRING - PAGE 2 of 2
CAUTION! ADVERSE CONDITIONS / SPACING ISSUES
• Performance issues caused by adverse conditions are NOT warranted.
• To prevent damage to end panels due to condensation, apply industrial grade
silicone sealant and tightly join to opposite end panels. When not adjoining
cases, keep end panels at least 6” away from walls and structures. Rear
panels must also be kept at least 6” from walls and structures.
• Case must not be exposed to direct sunlight or any heat source.
• To maintain proper case temperature, keep case at least 15-feet from exterior
doors, overhead HVAC vents or any air curtain disruption.
• Self-contained case clearance: 6” min. air intake / 6” min. air discharge.
CAUTION
PRECAUTIONS
• Following are important precautions to prevent
damage to unit or merchandise.
• Please read carefully!
• See previous page for specifics on OVERVIEW,
TYPE, COMPLIANCE and WARNINGS.
WIRING DIAGRAM
• Each case has its own wiring diagram folded and in
its own packet.
• Wiring diagram placement may vary; it may be
placed near ballast box, field wiring box, raceway
cover, or other related location.
REFRIGERANT DISCLOSURE STATEMENT
• This equipment is prohibited from use in California with
any refrigerants on the “List of Prohibited Substances”
for that specific end-use, in accordance with California
Code of Regulations, title 17, section 95374.
• This disclosure statement has been reviewed and
approved by Structural Concepts and Structural
Concepts attests, under penalty of perjury, that these
statements are true and accurate.
THERMOMETER & THERMOSTAT USE
• Thermometers/thermostats only reflect air
temperatures. For ACTUAL product (food)
temperatures, use a calibrated food probe thermometer
ONLY.
• For accurate readings, DO NOT use infrared food
thermometers.
CAUTION! LAMP REPLACEMENT GUIDELINES
LED lamps reflect specific size, shape and overall design.
Any replacements must meet factory specifications.
CAUTION! CHECK CONDENSATE PAN, ITS POSITION & PLUG!
Water on flooring can cause extensive damage!
• Before powering up case, check that condensate pan is positioned
directly under case’s condensate drain.
• Before powering up case, check that condensate pan’s electrical plug is SE-
CURELY connected to condensate system’s receptacle.
• If wicking material is used in condensate pan, check that it is secure.
CAUTION! GFCI BREAKER USE REQUIREMENT
If N.E.C. (National Electric Code) or your local code
requires GFCI (Ground Fault Circuit Interrupter) protection,
you MUST use a GFCI breaker in lieu of a GFCI receptacle.

5
SHIPPING SUPPORT REMOVAL / FRONT & REAR GRILLE REMOVAL / REMOVING CASE FROM SKID
1. Removing Caster Shipping Support (or
Shipping Support Bracket) Attached To Skid
• Remove screws holding shipping supports (or
shipping support brackets) to skid. Discard.
• Note: Shipping supports and/or brackets will vary
in size, shape, material and location depending
upon case type and model.
• See illustration below-left.
2. Remove Front and Rear Grille Before
Removing From Skid
• Front and rear grilles may be attached to case
during shipment.
• If they are attached to case, they must be
removed prior to skid removal.
• Screw removal may be required.
• After case is in position (and level and plumb, if
case has levelers), you must reattach these
components to case.
3. Remove Case From Skid
• To prevent damage, support case while it is
being removed from skid.
• For units with casters, the case may be rolled off
skid via ramp (as shown below-right) and into
position.
• For units with legs/levelers, carefully slide case
off skid (at one end). Then slide skid out from
under case at other end (as shown immediately
below).
• Use adjustable wrench and/or pry bar to level.
• Case must be level & plumb after it is in position.
Note: Front and Rear Grille Must Be
Removed Prior To Skid Removal To
Prevent Damage To Components!
Pry Bar
Adjustable
Wrench
Sample Caster Shipping
Support (To Be Removed
And Discarded)
Sample Shipping Bracket (To Be
Removed And Discarded)

6
CASE PLACEMENT / CASTER LOCKING & UNLOCKING OPERATION / START-UP AND OPERATION
Main Power
Switch
Light
Switch
1. Caster Locking / Unlocking Operation
• If casters have locking feature, they may be
locked to prevent case from moving (after case
has been moved into position).
• To lock caster (from the unlocked position), press
down on each RAISED caster lever (as shown in
illustration below-left). Casters will lock in place.
• To unlock casters (from the locked position),
press down on the RAISED caster lever (as
shown in illustration below-left). Casters will now
be unlocked.
2. Merchandiser Start-Up
• Do not use an extension cord with this appliance.
• Do not operate this equipment with a damaged
cord, plug or outlet.
• Insure the main power switch is off.
• Plug cord into a certified 110V electrical outlet
with ground.
• Turn main power on.
• Remove upper front panel (simply lift up and
off with no screw removal required. Switch is
on the right side of case.
• Coil fan should turn on.
• From inside of case, check for discharge air
from front baffle, to confirm that the fans are
functioning properly.
• When case is in start-up mode or has been idle
for a long period of time, the unit will require
75-minutes running time to pull-down
temperature.
• Turn lights on.
• Light switch is a rocker type on the under
right side of the top light.
• The lights should come on at the same time.
First time lighting may require a short
warm-up period for the bulbs. Slightly dim or
a flickering of new bulbs is normal.
• It is recommended that the self-contained
refrigerated cases maintain front and rear airflow
clearance of approximately twelve inches.
• Obstruction or restriction of air can void warranty.
• Note: Case temperature is set at the factory,
as determined by the case size.
• Temperature is controlled by a thermostat.
• If a temperature setting change is required,
refer to the instructions for the temperature
controller operating section of this manual.
• Note: See serial label on case for set point.
Casters
Locked Casters
Unlocked

7
MAINTENANCE FUNDAMENTALS
Removing the Front Panel
• Lifting the panel from lower edge upward
approximately a half inch into a channel lip,
disengages the support taps on the lower edges.
• Pivot out lower edge approximately one inch
and lower panel to remove.
Removing the Front Grille
• Lifting the grille upward approximately a half inch
disengages a top support flange and the support
taps on the back lower side of the grille from the
frame .
• Pivot out lower edge and remove grille.
Removing the Rear Doors
• Move the rear doors toward the center of the
case.
• Individually lift each door up toward the top of
the case and pivot the bottom of the door out
from track.
Removing Interior Shelving:
• Remove the rear doors.
• Remove the glass or ABS shelving.
• Remove the rear shelf support from brackets.
• Remove shelf light from brackets and rotate to
facilitate maintenance.
• Note: shelf light cannot be remove without
being disassembled.
• Shelf brackets can not be removed.
Light Fixture
Removal/replacement of lamp:
• See next page.
Channel Lip
Support Tabs
Upper Front Panel
Front Grille
Support Rest
Support Tabs
Support Flange
Glass or ABS Shelves Rear Shelf Support
Shelf Light
Shelf Brackets

8
LIGHT FIXTURES
LED Style Light Switch and Fixtures
>> LED light switch is located at left of top LED
light (as illustrated below-right).
Removal of Faulty LED Lights:
• LED lights rarely require change-out.
• Contact Structural Concepts’ Technical Service
Department for replacement LED lights.
• Turn off LED light switch.
• To remove faulty LED light, follow these steps:
A. Disconnect plug from LED light.
B. Using both hands, grasp LED light assembly
(with its magnetic mounting clips). Pull
downward and off its shelf (or header).
C. Remove magnetic mounting clips from LED
light by pressing against flange part of clip
with thumb.
>> Note: Mounting clips MAY be riveted to shelf or
header. In such instances, simply remove LED light
No Gap
Gap
Magnetic
Mounting Clip View #2
LED
Lights
B
A
Plug
Barrel
Shaped
Insert
LED
Light
C
Magnetic
Mounting Clip View #1
from mounting clips by pressing against flange part of
clips with thumb.
Replacement of LED lights:
• Attach magnetic mounting clips onto LED light.
• Adjust magnetic mounting clips so they are equally
spaced on LED light.
• Reattach LED light assembly to its shelf/header.
• Position properly in shelf/header.
>> Note: If mounting clips are riveted to shelf (or
header), attach by placing LED in base of clip and
then snapping into clip at FLANGE SIDE.
• Press plug’s barrel-shaped insert all the way into
LED light.
• Important: If plug is not inserted ALL THE WAY IN
the LED light’s orifice, the light may not energize.
See “BAD” vs. “GOOD” insertion illustrations
below-right.
• Turn LED light switch back on.

9
ELECTRICAL & REFRIGERATION FUNDAMENTALS
Ballast Top CapRocker Switch
Temperature
Controller
Approximate Ballast
locations (illustration may
not be exactly as shown)
Electrical: Access and Connections
Warning, disconnect power before providing
maintenance and service to unit.
Ballast access
• Remove 4 screws from the back of the top cap
to access electrical connections and ballasts.
Temperature & Defrost Control
• The case temperature is set at the factory, as
determined by the case size. The temperature
is controlled by a thermostat. If a temperature
setting change is required, follow the
instructions for the Carel® Controller in the
technical information section of this operating
manual.
• If service is required to the temperature
control unit, call Structural Concepts. This
maintenance should be performed by a
certified technician.

10
REFRIGERATION FUNDAMENTALS
Evaporator fan access
• Remove lower decking. A finger hole is provided
to assist in lifting up and pulling out deck.
Expansion valve access
• Remove lower decking. A finger hole is provided
to assist in lifting up and pulling out deck.
• Remove fan shroud assembly.
• Unplug the fan at the shroud support.
• Remove four screw knobs from the fan
shroud.
• Carefully remove shroud to avoid damage to
mirrors or front air deflector.
Refrigeration:
Access and Connections
• Assembly or disassembly and servicing to
be accomplished by licensed refrigeration
contractor.
• Refer to maintenance fundamentals for access.
• Remove front panel.
• Remove front grill.
Front of Case Sight Glass
Carel Controller®
Refrigerant Service Fittings
Hot Gas Evaporator
Lower Decking
Evaporator
Fan
Fan
Shroud

11
SERIAL LABEL LOCATION & INFO LISTED / TECH INFO & SERVICE / REFRIGERATED CASES ONLY
--- Sample Serial Label For Refrigerated Cases ---
MODEL NRS3648RXV-SAMPLE
SERIAL NO. 12345X30DZ098765
888 E. Porter Rd - Muskegon, MI 49441
3048256
Conforms to UL Std. 471
Conforms to NSF/ANSI Stds. 2 & 7
CERTIFIED TO CAN/CSA
STD C22.2 NO 120
ELECTRICAL RATING
REFRIGERANT
DESIGN PRESSURE
MINIMUM CIRCUIT AMPACITY
MAXIMUM OVERCURRENT
120/1/60 16 A
R513A AMOUNT 50 OZ
HIGH 186 LOW 88
20A
20A
Super Heat Temp 6-8 °F FOR PARTS AND SERVICE
Defrost 6 defrosts per day, 45 °F CALL 1-800-433-9490
Serial Label Location & Information Listed /
Technical Information & Service
• Serial labels are affixed at a wide range of places
(on the header, near thermostat, at case rear,
behind panels/toe-kicks, on electrical boxes, etc.).
• Serial labels contain electrical, temperature and
refrigeration information, as well as regulatory
standards to which the case conforms.
• Sample serial label is shown. A variety of models is
displayed on serial label for illustration purposes only.
Your case’s serial label will reflect only one model.
• For additional technical information and service, see
the TECHNICAL SERVICE page in this manual for
instructions on contacting Structural Concepts’
Technical Service Department.
Reveal
Harmony
Fusion
Impulse
Addenda
Blend
Grocerant
Oasis
Sample QR Code
SCAN FOR PRODUCT LITERATURE
SAMPLE ONLY

12
CLEANING SCHEDULE (TO BE PERFORMED BY STORE PERSONNEL)
Freq. Instructions
Daily Glass / Mirrors: Clean with household or commercial glass cleaner.
Daily Acrylic: Clean with a warm water and mild soap solution and soft cloth. Never use ammonia-based
cleaners (or regular glass cleaner) on acrylic.
Weekly Magnetic Condenser Coil Filter (Self-Contained Units Only):
• This filter helps prevent dust particles from entering condenser coil. It is accessible at rear.
• Clean magnetic condenser coil filter by following either of these steps:
1. As magnetic condenser coil filter is dishwasher safe, remove from case (no screw
removal required) and use a rag or soft-bristled brush to wipe off excess dust particles
from filter. Run in normal dishwasher cycle. Remove from dishwasher. Dry with soft
cloth or paper towel. Return to case.
2. If not using dishwasher, remove magnetic condenser coil filter from case. Use a rag or
soft-bristled brush to wipe off excess dust particles from filter. Submerse in warm,
soapy water. Use soft-bristled brush to remove dust, dirt, grease and grime that may
collect on filter. Rinse thoroughly.
Weekly Condensing Coil: Remove base panel and condensing coil cover. Vacuum or brush condenser coil
with metal or fiber brush to remove dust and dirt. Be careful to avoid damaging coil fins while cleaning!
Weekly Rear Sliding Doors and Door Track: Remove rear doors. Clean w/household or commercial cleaner.
Clean out door track with moist cloth.
Daily Decks & Inserts: Wipe down and clean with mild soap, water & soft cloth.
Weekly Baffle: Remove from case. Clean with soft-bristled brush. See photos A - B - C below.
Weekly Crumb Drawer: Pull out and empty. Clean with moist cloth. See photo B below.
Weekly Decks & Inserts: Remove and clean with mild soap, water & soft cloth
C. Baffle (Enhancing
Refrigerating
B. Baffle (out of
case) & Crumb
Tray (pulled out)
WARNING! TURN OFF POWER TO CASE BEFORE PERFORMING PREVENTIVE MAINTENANCE!
Magnetized Condenser
Coil Filter A. Baffle (Preventing
Refrigeration) & Crumb Tray
(shown not pulled out)

13
CLEANING SCHEDULE (TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY)
Freq. Instructions
Qtly Condensing Coil: Using air pressure or an industrial strength vacuum, clean the dust and dirt that
may collect on the condenser coil. It may be necessary to use a soft-bristled brush to loosen up
caked dust and debris that may form on coil.
Qtly Under Case Cleaning: Once refrigeration package is clear of unit, vacuum under case to remove
all dust and dirt that may collect.
Qtly Tub, Coil and Drain: Remove evaporator fan panel (as shown in images #1 and 2 below) and
clean tub, coil and drain with warm water and mild soap solution. Remove debris clogging drain.
Qtly Compressor Area: Slide out from case. Wipe off dust & debris with moist cloth.
Hot Gas Loop (or Electric Coil) Condensate Pan / Refrigeration Package: Caution! You must
turn off main power switch before cleaning!
• Remove front panel. Turn main power switch off.
• Slide refrigeration package out from under rear of case.
• Use a scrub-brush and a non-corrosive de-scaling solution (to remove calcium, lime and rust)
to clean hot gas loop condensate evaporator pan. Follow instructions as to proper dilution,
safety precautions and scrubbing method.
• After thoroughly cleaning pan with scrub-brush and solution, rinse thoroughly with clean water
(in spray bottle) and wipe dry with sponge or paper towel.
• Use moist cloth to wipe off dust & debris that collects on fans, sight glass, overflow pan, etc.
• Slide condenser package back under case.
• Return rear panel to case.
Qtly Fan Blades, Shroud, Drain: Wipe down each blade and shroud with moist cloth. Clean out drain.
See images #1 and 2 below.
Qtly Honeycomb: See PREVENTIVE MAINTENANCE - HONEYCOMB AIR DIFFUSERS (TRAINED
SERVICE PROVIDERS ONLY) section in this manual for specifications.
Qtly Upper and Lower Step Inserts: Remove from Case. Wipe down with damp cloth.
Image #1
Use finger holes to lift up
Deck. Remove from case.
Image #2
Clean under air return grille and fan shroud
area with moist cloth. Remove drain
cleaning access door and clean drain.
WARNING! TURN OFF POWER TO CASE BEFORE PERFORMING PREVENTIVE MAINTENANCE!

14
PREVENTIVE MAINTENANCE - HONEYCOMB AIR DIFFUSERS (TRAINED SVC. PROVIDERS ONLY)
Honeycomb Air Diffuser Removal
See PREVENTIVE MAINTENANCE (TO BE
PERFORMED BY TRAINED SERVICE PROVIDER)
section in this manual for cleaning frequency.
A. Wedge a non-metallic device of suitable strength
(such as a ballpoint pen) between the honeycomb
and the end panel.
Caution! Use care not to dislodge the heating wire
(that prevents condensation on the lamp assembly).
B. Apply pressure to collapse the honeycomb to
allow it to be pulled out of honeycomb retainer.
C. Carefully pry downward and away from the
honeycomb retainer. Remove entirely from case.
Clean honeycomb with warm water and soap
A
B
C
D
E
F
solution. Submerse if necessary. Use brush to
dislodge stubborn or sticky residue. Dry by using
vacuum’s blow mode (vs. suction mode).
Honeycomb Air Diffuser Installation
D. Squeeze honeycomb to allow it to fit into the
honeycomb retainer.
E. Carefully slide honeycomb into place.
F. Adjust honeycomb so that it fits flat against
retainer. It must not be wavy or out of position.
Note: For honeycomb air diffusers in other
locations, these same general instructions apply.
Location of
Honeycomb Air
Diffuser

15
TROUBLESHOOTING (TO BE PERFORMED BY STORE PERSONNEL) - PAGE 1 of 2
Product is Drying Out Check the relative humidity in the store.
Water on the Floor Check that the drain is correctly positioned over condensate pan.
Check that condensate overflow pan is plugged in.
Check that drain and drain trap do not have debris in them.
Excessive Fan Noise Check that the case is aligned, level and plumb.
System is not Operating Check that the utility power is on.
Check that the MAIN power switch is on.
Check the circuit breaker box for tripped circuits.
Alarm is Flashing (or Sounding) See alarm and fault codes
Digital Control Display is Blank Check that the MAIN power switch is on.
Check the circuit breaker box for tripped circuits.
Fans Not Working Check that the MAIN power switch is on.
Case Lights Not Working Check that ALL of the lights are plugged in.
Check bulbs for proper installation and connection.
Check for burned out bulbs.
Clean dirt and dust from the bulbs to prevent flickering.
Check that light switch is in the on position.

16
TROUBLESHOOTING (TO BE PERFORMED BY STORE PERSONNEL) - PAGE 2 of 2
Controller Display Flashing If display is flashing, see PROGRAMMABLE CONTROLLER
section in this User Manual.
Not Holding Temperature If a large amount of warm product was added to the case, it will take
time for the temperature to adjust. Unit needs pre-chilled product.
The temperature will change during defrost cycle but will return to
normal when compressor turns on.
Check to see if the condenser coil has been cleaned.
Check that the case is not in the sun or near a heat or
air-conditioning vent. See OVERVIEW / TYPE / COMPLIANCE /
WARNINGS / PRECAUTIONS / WIRING section in this manual for
specifics.
Check air grilles for obstruction and remove.
Ensure that front air grilles are not obstructed by product or other
décor.
Note: Keep product off front air grilles! Product displayed on
front air grilles will cause case to run warm and will negate
warranty.
THERMOMETER & THERMOSTAT LIMITATIONS:
• Thermometers/thermostats only reflect air temperatures. For ACTUAL
product (food) temperatures, use a calibrated food probe thermometer
ONLY.
• For accurate readings, DO NOT use infrared food thermometers.
Condensing Unit Not Operating Check that the main power switch is turned on.
Controller may be in defrost mode. Compressor cycling on and off is
a normal condition. See PROGRAMMABLE CONTROLLER section
in this User Manual.
Check if the case is on and the control display is blank. If blank,
contact technical support (see toll-free number at end of manual).

17
TROUBLESHOOTING (TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY) - PAGE 1 of 3
CONDITION TROUBLESHOOTING
Water Is On The
Floor
Caution! Disruption of power can cause water to overflow pan and seep onto
flooring causing damage! Check that power to case is constant. Until power is
restored, follow these procedures:
• Use wet-dry vacuum (or mop & bucket) to remove standing water.
• Use ‘catch pans’ for water to drainage. Swap out regularly until evaporation of
case is complete (or until power is restored).
• When power to case is restored, evaporator pan should function properly and
water will no longer overflow onto flooring.
Check that the drain trap is free of debris.
Check that the drain hose is correctly positioned over condensate pan (or floor drain,
for remote units).
Check store conditions.
• To prevent condensation in NSF/ANSI Type I environments, maximum conditions
are to be 55% relative humidity / 75° Fahrenheit.
• For NSF/ANSI Type II environments, maximum conditions are to be 55% relative
humidity / 80° Fahrenheit.
• If you are unsure if your unit is classified as NSF/ANSI Type I or Type II, see tag
next to serial label on your case.
Check that evaporator pan is properly plugged in or connected.

18
CONDITION TROUBLESHOOTING
Fan Emits Excessive
Noise
Check that the case is aligned, level and plumb.
Check evaporator fan for cleanliness.
Unplug/power off fan motors. Check motor shaft for bearing wear.
Check that fan motors are securely mounted in brackets.
Verify that fan blades are securely mounted to fan motor.
Check that nothing is preventing blade rotation.
Check that the fan shroud is properly secured.
Fans Are Not Working Check that the MAIN power switch is on.
Check that fans are plugged in at the fan shroud.
Check for foreign material obstructing fan performance.
Check that fan blades freely rotate within fan shrouds
Check that power is going to fans
Check that fan wiring is connected on terminal blocks.
Digital Control Display
Is Blank
Check that the MAIN power switch is on.
Check the circuit breaker box for tripped circuits.
System Not Operating Check that the utility power is on.
Check that the MAIN power switch is on.
Check the circuit breaker box for tripped circuits.
TROUBLESHOOTING (TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY) - PAGE 2 of 3

19
TROUBLESHOOTING (TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY) - PAGE 3 of 3
CONDITION TROUBLESHOOTING
Case Lights Are Not
Working
Check that light switch is on. See START-UP AND OPERATION in this manual for
location.
Check that ALL of the light cords and plugs are properly connected. See
MAINTENANCE FUNDAMENTALS section in this manual.
Check voltage at ballast (or driver). If voltage is entering but not exiting, ballast (or
driver) may be faulty.
Control Display Is
Flashing
See your case’s serial label for your model’s specified settings. See SERIAL
LABEL LOCATION & INFORMATION LISTED / TECH INFO & SERVICE for
label location, etc.
Case Is Not Holding
Temperature
If a large amount of warm product was added to the case, it will take time for the
temperature to adjust. Unit needs product to be pre-chilled.
Temperature changes during defrost mode but will return to normal. Fourth LED
will indicate defrost cycle in progress.
Check that case is not in sun or near a heat or air-conditioning vent. See
OVERVIEW / TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS / WIRING
section in manual for adverse conditions/spacing issue parameters.
If case is located near front doors, temperature fluctuation can hinder unit’s ability
to maintain temperature. See OVERVIEW / TYPE / COMPLIANCE / WARNINGS /
PRECAUTIONS / WIRING section in manual for adverse conditions/spacing issue
parameters.
Check that magnetized condenser coil air filter (attached to rear grille) has been
cleaned. See GENERAL CLEANING (TO BE PERFORMED BY STORE
PERSONNEL) section in operating manual for instructions.
Check that condenser coil has been cleaned.
Check air return grilles for obstructions.
Check sight glass for flashing and/or low charge.
Check Set Point Temperature; it may be adjusted too high.
THERMOMETER & THERMOSTAT LIMITATIONS:
• Thermometers/thermostats only reflect air temperatures. For ACTUAL product (food)
temperatures, use a calibrated food probe thermometer ONLY.
• For accurate readings, DO NOT use infrared food thermometers.
Condensing Unit Is
Not Operating
Check that the power is turned on.
Determine if temperature controller settings are properly set. See your case’s
serial label for your model’s specified settings. See SERIAL LABEL LOCATION &
INFORMATION LISTED / TECH INFO & SERVICE section in manual for label
location, etc.

20
TROUBLESHOOTING (BY TRAINED SERVICE PROVIDERS ONLY) - CONDENSING SYSTEM
CONDITION TROUBLESHOOTING
Head Pressure Too High Check that the condensing coil is not dirty or covered.
Check that condensing fans are working.
Check that refrigerant is not overcharged.
Perform sub-cooling check and verify that no contaminates are in system.
Check that liquid line filter dryer is not plugged.
Check that close-offs are intact (around condensing coil) and that air is not
recirculate.
Check that store ambient temperature isn’t above maximum allowed. See
OVERVIEW / TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS /
WIRING / PLUGS section in this manual.
Head Pressure Too Low Check if sight glass is flashing or showing low charge.
Check that suction pressure isn’t too low.
Check that compressor reed valves aren’t bad. Look for high suction/low
head pressure. Perform pump-down.