Structural Concepts Oasis B824TM User manual

Rev E Date: 3.25.2015
PN 54298
READ AND SAVE THESE INSTRUCTIONS
I:\Oper Manuals\Oasis\B424TM_4489_4857_B824TM_54298.pub
Model B424TM……………………………………...…..... 47 1/4”L* x 25”D x 84 3/4”H~
Model B424TM.4489……………...……………….…….. 47 1/4”L* x 25”D x 84 3/4”H~
Model B424TM.4857……………...……………….……...47 1/4”L* x 25”D x 84 3/4”H~
Model B824TM……………………...……………….…….92 1/4”L* x 25”D x 84 3/4”H~
*Includes End Panels
~ Units With Levelers Extended 1 5/8” Below Base Frame To Attain Listed Height
IN AISLE SELF-SERVICE REFRIGERATED CASES WITH TOP MOUNT CONDENSER PACKAGE
888 E. Porter Road · Muskegon, MI 49441 Phone: [phone] Fax: [phone] www.structuralconcepts.com
INSTALLATION AND
OPERATING MANUAL
MODEL B824TM Shown
(With Optional Upper Lights)
MODEL B424TM Shown
(With Optional Night Air Curtain)

2
TABLE OF CONTENTS
OVERVIEW / NSF® TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS ...……….....…...……….
INSTALLERS: FOLLOW THESE INSTRUCTIONS! ………….………………………………………..…..
POSITIONING CASE / SHIMMING SUPPORT RAILS / ADJUSTING LEVELERS ………………..…...
CASE STARTUP & REFRIGERATION PACKAGE ACCESS - MODELS B424TM, B424TM.4489 &
B424TM.4857 ...…………………………………………………………………………………...…...
CASE STARTUP & REFRIGERATION PACKAGE ACCESS - MODEL B824TM ONLY …………..….
CASE STARTUP & REFRIGERATION ASSEMBLY ACCESS - EVAP. COIL FAN / TXV VALVE ...…
HONEYCOMB AIR DIFFUSER ACCESS / REMOVAL / INSTALLATION .……………...…………..….
LIGHT FIXTURES (INCLUDING OPTIONAL LIGHTS IN HEADER) ..………………………………..….
CONDENSATE PUMP AND PAN ACCESS …..………………………………………………………..…..
OPTIONAL NIGHT AIR CURTAIN OPERATING INSTRUCTIONS ……………………………………...
GENERAL CLEANING (TO BE PERFORMED BY STORE PERSONNEL) …………………..………...
TROUBLESHOOTING (TO BE PERFORMED BY STORE PERSONNEL) ……………………...……...
GENERAL CLEANING (TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY) ……....
PREVENTIVE MAINTENANCE (TO BE PERFORMED BY TRAINED SERVICE PROVIDERS
ONLY) …....................................................................................................................................
TROUBLESHOOTING (TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY) …..…..
TROUBLESHOOTING - CONDENSING SYSTEM (TO BE PERFORMED BY TRAINED SERVICE
PROVIDERS ONLY) …..……………………………………………………………………………..
TROUBLESHOOTING - EVAPORATOR SYSTEM (TO BE PERFORMED BY TRAINED SERVICE
PROVIDERS ONLY) …..............................................................................................................
SERIAL LABEL LOCATION & INFORMATION LISTED / TECH INFO & SERVICE …..…………...…..
CAREL® CONTROLLER OPERATING INSTRUCTION ………………………………………………......
SCC TECHNICAL SERVICE CONTACT INFORMATION & WARRANTY INFORMATION .................
3-4
5
6
7
8
9
10
11
12
13
14
15
16
17
18-19
20
21
22
23-25
26

3
OVERVIEW / NSF® TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS - PAGE 1 of 2
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 / Hot Gas Loop Condensate System is Hot!
Disconnect and allow to cool
before cleaning or removing from case.
WARNING
ELECTRICAL
HAZARD
WARNING
KEEP
HANDS
CLEAR
WARNING
HOT
SURFACE
OVERVIEW
 These Structural Concepts Oasis® self-service
cases are designed to merchandise packaged
products at 41 °F (5 °C) or less product temperatures
(unless custom cases with wire rack shelving).
 Cases should be installed and operated according to
this operating manual’s instructions to insure proper
performance. Improper use will void warranty.
TYPE I vs. TYPE II ENVIRONMENTAL CONDITIONS
This unit is designed for the display of products in
ambient store conditions where temperature and
humidity are maintained within a specific range.
 Type I display refrigerators are intended for use in an
area where environmental conditions are controlled
and maintained so that the ambient temperature does
not exceed 75 °F (24 °C) and 55% maximum humidity.
 Type II display refrigerators are intended for use in an
area where environmental conditions are controlled
and maintained so that the ambient temperature does not
exceed 80 °F (27 °C) and 60% maximum humidity.
 If unsure if your unit is Type I or II, see tag next to serial
label. See SERIAL LABEL LOCATION &
INFORMATION LISTED / TECH INFO & SERVICE
section in this manual for sample serial labels.
 COMPLIANCE
 Performance issues when in violation of applicable
NEC, federal, state and local electrical and plumbing
codes are not covered by warranty.
 See below compliance guideline.
WARNINGS
 Following are important warnings to prevent injury or
death.
 Please read carefully!
 See next page for PRECAUTIONS.
COMPLIANCE
This equipment MUST be installed in compliance with
all applicable NEC, federal, state and local
electrical and plumbing codes.
ATTENTION
CONTRACTORS

4
OVERVIEW / NSF® TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS - PAGE 2 of 2
PRECAUTIONS
 Following are important precautions to prevent damage to unit or merchandise.
 Please read carefully!
 See previous page for specifics on OVERVIEW, TYPE I AND TYP II ENVIRONMENTAL CONDITIONS,
COMPLIANCE and WARNINGS.
CAUTION
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.
CAUTION
Fluorescent lamps have been treated to resist breakage
and must be replaced with similarly treated lamps.
CAUTION! ADVERSE CONDITIONS / SPACING ISSUES
 Performance issues caused by adverse conditions are NOT covered
by warranty.
 End panels must be kept at least 6-inches away from any structure to
prevent condensation.
 Unit must be kept at least 15-feet from exterior doors, overhead
HVAC vents or any air curtain disruption to maintain proper
temperatures.
 Unit must not be exposed to direct sunlight or any heat source
(ovens, fryers, etc.).
 Tile floors, low ceilings or small rooms will increase noise level.
Whisper Cool compressor blanket or remote unit may resolve noise
level issues.
 Keep at least 8-inch clearance above unit for air discharge
(self-contained units only).
CAUTION
WIRING DIAGRAM FORMAT & LOCATION
 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.

1. Remove Shipping Brackets Attached to Skid
 Remove screws holding Case Shipping Brackets to skid.
 Remove Case Shipping Brackets from Skid.
 See illustration at right. Note: Shipping Brackets will vary
in size, shape, material and location depending upon case
type and model.
2. Remove Unit From Skid
 While supporting case, carefully slide case off from skid at
either left or right side of case (NOT at case rear or front).
 See illustration at mid-right for method.
 Remove Shipping Support Board
 Place into proper position.
3. Attach Condensate Pan to Unit
 Condensate pump pan is shipped separately from case.
 After case is in position, plug cord into electrical box at
underside of case, hook condensate hose to pump nozzle.
 Slide into place (at case underside).
 See illustrations 3A through 3D below.
 Note: Images 3A through 3D are for illustrative purposes
only. Though images may show condensate pan on skid,
case has been removed from skid prior to these steps.
 Caution! Be sure to loop the pump’s electrical cord
through the cord hooks under the case.
Carefully Slide
Case Off Skid
Shipping
Support Board
Condensate
Pump Pan
Pump Nozzle
Electrical cord from pump (to be
looped through the cord hooks
under the case).
Condensate Pump
Pan Support
Bracket (one at
either side)
Condensate
Pump Hose Drain Pipe (to be positioned
over
condensate
pump pan)
View of Condensate Pump
Pan (Positioned Properly and
Fully Connected)
Sliding Condensate
Pump Pan under case
3B
3A
3D
3C
I:\Oper Manuals\Specialty\CDR4489.B424TM Skid RemovalSheet\4489.B424TM_Skid_Removal_Sheet_54413.pub Rev B Date: 1.22.2011
Case
Shipping
Brackets
INSTALLERS: FOLLOW THESE INSRUCTIONS SCC P/N 54113
5

6
POSITIONING CASE / SHIMMING SUPPORT RAILS / ADJUSTING LEVELERS
Note: Units shown may not depict an exact representation of your particular unit being installed.
Pry Bar Base
Frame
Leveler
Adjustable
Wrench
Toe-Kick
1. Position & Align Case Alongside Other
Cases
 Before adjusting levelers (or shimming frame
support rails), make certain that the case is
in proper position and, if required, aligned
with adjoining case(s).
 This may require the repositioning of the
case you are installing or the already
positioned case(s).
2. Cases With Frame Support Rails: Shim
 Illustration at top right shows case with frame
support rails.
 Shims will be provided with all cases that
have frame support rails.
 Use shims to level case.
 Note: After case is in position, it must be
sealed to floor to prevent entry or
leakage of liquid or moisture.
3. Cases With Levelers: Adjust Levelers
 After case is in position, adjust case so it is
level and plumb (as shown at right).
 You may need to remove front and/or rear
toe-kick to access levelers.
 Use adjustable wrench (and possibly a pry
bar) to adjust leveler.
 Do not use pry bar on toe-kick as it may
buckle.
 Do not use pry bar on end panel; it may chip.
 Use pry bar ONLY on base frame to avoid
damaging case.
 See illustration and photos at lower right.
Frame Support
Rails
Frame Support
Rails

7
CASE STARTUP & REFRIGERATION PKG. ACCESS - MODELS B424TM, B424TM.4489 & B424TM.4857
Main Power
Switch
Electrical and Control Access
 Main power cord and switch are accessible from
the top front right hand side of header assembly.
 Thermostat control settings / refrigeration service
ports / evaporator pan are also accessible from top.
 Illustration below provides layout of components.
Condensate Pan Access
Warning! Disconnect power before providing
maintenance and service to unit.
 Condensate pan is accessible from the top of the
unit.
 Unplug the evaporator pan from its outlet.
 Remove screws holding the condensate pan foot to
the compressor pan (see illustration below).
Thermostat
Controller
Condensate Pan
and Removal
Screws
Condenser
Coil --- Case Front ---
CompressorReceiverReceiverSight Glass
Condenser
Coil Fans
Compressor
Electrical Box
Ballast Box /
Contactor / Terminal
Strip / Thermostat
Controller /
Main Power Switch
 Caution! To avoid injury, check temperature of
pan prior to handling condensate pan.
 If condensate pan must be removed from unit
(to properly clean), remove carefully by lifting
condensate pan up and off base.
 Empty condensate pan contents into suitable
container.
 See PREVENTIVE MAINTENANCE (TO BE
PERFORMED BY TRAINED SERVICE
PROVIDERS) section in this manual for
cleaning specifics.
 When done servicing or cleaning, return and
reconnect in reverse order it was removed.
 Note: See next page for Model B824TM
refrigeration package layout & access.

8
CASE STARTUP & REFRIGERATION PACKAGE ACCESS - MODEL B824TM ONLY
Main Power
Switch Thermostat
Controller
Accumulator
Condenser
Coil
--- Case Front ---
Receiver Sight Glass
Condenser
Coil Fans
Electrical Box
For Overflow
Unit
Ballast Box /
Contactor / Terminal
Strip / Thermostat
Controller / Main
Power Switch
Hot Gas
Condensate
Coils and Pan
Scroll
Compressor
Electrical
Box
Drain (From Hot
Gas Condensate
Coils and Pan
Filter Dryer
Electrical and Control Access
 Main power cord and switch are accessible from the
top front right hand side of header assembly.
 Thermostat control settings / refrigeration service
ports / evaporator pan are also accessible from top.
 Illustration below provides layout of components.
Hot Gas Loop Condensate Pan (and Electric Coil
Overflow Pan) Access
Warning! Turn off Main Power Switch Before
Providing Maintenance or Service to Unit.
 Both hot loop condensate pan and electric coil over-
flow pan is accessible from top of unit.
 Caution! Before accessing pans, turn main
power off and allow to cool!
 To avoid injury, check temperature of pans
prior to accessing.
 See PREVENTIVE MAINTENANCE (TO BE
PERFORMED BY TRAINED SERVICE
PROVIDERS) section in this manual for
cleaning specifics.
 When done servicing or cleaning, turn main
power switch back on.
 Note: See previous page for other models’
refrigeration package layout & access
instructions.

9
CASE STARTUP & REFRIGERATION ASSEMBLY ACCESS - EVAP. COIL FAN / TXV VALVE
1. Evaporator Coil Fan Discharge
When Main Power Switch is turned on, Refrigeration Assembly will energize (see CASE START-UP &
REFRIGERATION ASSEMBLY ACCESS section).
 Evaporator Coil fan should turn on. From inside of the case, check for discharge air from honeycomb
discharge duct (see next page for honeycomb location), to confirm that the fan is functioning properly.
 When the case is in a start up mode or has been idle for a long period of time, the unit will require 75
minutes of run time to pull-down temperature.
2. TXV Valve
 TXV Valve (at Customer Front-Left of Case).
 Decking must be removed for access.
 See illustration below for location.
Evaporator Coil
fan assembly
Decking
View of TXV valve after
customer end panel
removed (for illustrative
purposes only).

10
HONEYCOMB AIR DIFFUSER ACCESS / REMOVAL / INSTALLATION
1. Honeycomb Air Diffuser Removal
 Honeycomb is located in discharge air duct.
 Use a device of suitable strength and agility such as a ballpoint pen or long nose pliers.
 Wedge instrument in Honeycomb near the Front Honeycomb Retainer Lip (see illustration below).
 Applying pressure toward case rear, so that Honeycomb will scrunch together; then pry downward and
away from the top light and discharge panel.
 Pull honeycomb out fully buy grasping with fingers and pulling downward.
2. Honeycomb Air Diffuser Installation
 Insert honeycomb up into Rear Honeycomb Retainer Lip first.
 Apply pressure toward case rear, so that the Honeycomb will ‘scrunch’ together; then apply pressure to
honeycomb, lifting it up past Front Honeycomb Retainer Lip and ‘un-scrunch’ Honeycomb.
 Note: Depending upon model and features, the illustration below may slightly differ from yours.
 Note: Illustration below reflects general outline of sample case and does not reflect any particular model
or options.
Honeycomb
Front
Honeycomb
Rear
Honeycomb

Light Fixtures (Note: Light Fixtures May Not Be on All Cases)
Warning! Disconnect power before providing maintenance and
service to unit.
Caution: Lamps have been treated to resist breakage and must
be replaced with similarly treated lamps.
 Note: Light Switch is at underside of header, behind honeycomb.
All lights come on at same time when light switch is turned on.
Light fixtures are to be located on underside of shelf assembly, at the
top inside of case, and lower front nose of case. Some cases have
lights in header. See illustration at right for lamp locations.
Removal of lamp:
 Rotate lamp (1/4-turn) either direction to disengage (upper or
lower) pins/contacts from lamp-mounting sockets.
 Remove bulb by applying even pressure from back side at the
bulb ends and pulling the remaining contact from sockets.
Installation of lamp:
 Align pins with slot.
 Insert pins into socket by rotating the bulb 1/4-turn to secure
either the (upper or lower) pin contacts into the sockets.
 Rotate remaining bulb contacts (1/4-turn) into remaining lamp
mounting socket contacts.
Lights in headers:
 Lights in headers are optional.
 Lights are accessible from top of case. Ample space is provided
for lamp removal and replacement
11
LIGHT FIXTURES (INCLUDING OPTIONAL LIGHTS IN HEADER)
Optional: Lights in Headers Are
Accessible From Top of Case.
Ample Space is Provided For
Lamp Removal/Replacement
Light
Switch

12
CONDENSATE PUMP AND PAN ACCESS
Condensate Pump Pan Access
Warning! Disconnect power before providing maintenance and service to unit.
 Remove the two (2) screws holding the toe kick in place. (see illustration below).
 The Condensate Pan is accessible from the bottom of the unit. Unplug the Condensate Pan from its
outlet.
 A 1/2” reinforced hose is provided to evacuate condenser water from condensate pump pan to an
evaporator pan placed on the top of case.
 Disconnect pump hose from condensate pump Carefully slide out the Condensate Pan from the
Condensate Pump cradle.
 When done servicing or cleaning, return and reconnect in reverse order it was removed.
Condensate
Pump & Pan
Condensate
Drain
Condensate Pump
Electrical Outlet (at
Right of Pump and
Pan on
Model B824TM
To remove the toe kick
remove the two screws
on each side of toe kick

13
OPTIONAL NIGHT AIR CURTAIN OPERATING INSTRUCTIONS
Optional Night Air Curtain Operating Instructions
1. Use caution when handling Night Air Curtain.
2. Display case may come with Night Curtain already attached. If not, a retrofit kit will be provided. If using
SCC-supplied retrofit kit, attach to display case by inserting screws at top-underside of display case.
3. Grasp the handle and pull downward to desired location (see illustration below).
4. Night Air Curtain’s Magnets will hold curtain in lowered position (as illustrated below).
5. To return Night Air Curtain to its retracted position, grasp handle, lift up and away from its magnetic
attachment plate and carefully wind Night Air Curtain back into roll.
6. Caution! Do not allow spring-loaded Night Air Curtain to freely snap back into roll. Doing so can eventually
destroy Night Air Curtain’s tension and retractability.
7. To entirely detach Night Air Curtain from case, slide Night Air Curtain toward rear of case, freeing it from its
‘keyhole’ slots. Lift upward and away from case.
Model B23.5258A Is Shown With
Optional Night Air Curtain.
Your Model May Vary.
Attachment Point For Night Air
Curtain’s Magnetic Retainers
Night Air Curtain Handle

14
GENERAL CLEANING (TO BE PERFORMED BY STORE PERSONNEL)
AREA TO CLEAN FREQ. INSTRUCTIONS
Daily to
Weekly
Case Front/Sides/Bumper:Use a mild soap and water solution and a
soft cloth.
Weekly to
Monthly Condenser Coil:Vacuum or brush grille condenser coil at case front
(on top of case). Use metal or fiber brush to remove dust and dirt that
can collect on condenser coils. Be careful not to damage the fins on the
coil. See INSTALLATION section in this manual for instructions on side
panel removal.
Case Interior Daily to
Weekly Shelves / Shelf Supports / Air Return Grilles / Decking / Inside End
Panels
 Wipe off shelf supports, air return grilles and decking with moist
cloth.
 Shelf supports can be removed for more thorough cleaning.
 Air return grilles can be removed for more thorough cleaning.
 Decking is NOT to be removed.
Case Exterior Daily Acrylic (if Any): Clean with a warm water and mild soap solution and
soft cloth. Never use ammonia-based cleaners on acrylic.

15
TROUBLESHOOTING (TO BE PERFORMED BY STORE PERSONNEL)
CONDITION TROUBLESHOOTING
Case Is Not Level See POSITIONING CASE / SHIMMING SUPPORT RAILS /
ADJUSTING LEVELERS section in manual for additional information.
Water Is On The Floor Call service provider.
Fan Emits Excessive Noise Call service provider.
Case Lights Are Not Working Check that light switch is in the on position.
Check that ALL of the light cords and plugs are properly connected. See
LIGHT FIXTURES (INCLUDING OPTIONAL LIGHTS IN HEADER)
section in this manual for specifics.
If case lights still do not come on, call service provider.
Case is Not Holding Proper
Temperature If a large amount of warm product was added to the case, it will take
time for the temperature to adjust. Product must be pre-chilled before
placing in case.
Check that the case is not in the sun or near a heat or air-conditioning
vent. See OVERVIEW / NSF® TYPE / COMPLIANCE / WARNINGS /
PRECAUTIONS section in this manual for specifics.
If case is located near front doors, temperature fluctuation can hinder
unit’s ability to maintain temperature.
Check air return grilles (area at front of decking) for obstructions.
DO NOT set product on air grilles as this will prevent proper airflow!
If case still is not holding proper temperature, call service provider.

16
GENERAL CLEANING (TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY)
AREA TO CLEAN FREQUENCY INSTRUCTIONS
Case Interior Monthly Evaporator Fan Shroud Area (Under Decking):Caution! Due to
rotating fans in area, turn off case and disconnect plug from
wall outlet before beginning fan shroud (and surrounding tub
area) cleaning! 1) Turn off power. 2) Remove decks from case.
3) Clean fan shroud area (and surrounding tub area) with moist
cloth.
Quarterly Tub & Drain:Caution! Due to rotating fans in area, turn off
power to case and disconnect plug from wall outlet before
beginning tub & drain cleaning! Vacuum tub under decks.
Clean with soap and water solution. Wipe dry with clean cloth.
Keep drain free of debris to prevent clogging.
Monthly Pan For Pumping Condensate to Top of Unit: (Located at
underside of unit): Remove front toe-kick to access.
 Check that pump is working correctly.
 Check that condensate pan is free of residue, dust or dirt.
 If it must be cleaned, slide out from under unit; clean with mild
soap and water solution and soft cloth. Rinse. Return to
underside of case in reverse order it was removed from case.
WARNING! TURN OFF CASE BEFORE PERFORMING GENERAL CLEANING!

17
PREVENTIVE MAINTENANCE (TO BE PERFORMED BY TRAINED SERVICE PROVIDERS)
WARNING! TURN OFF CASE BEFORE PERFORMING PREVENTIVE MAINTENANCE!
PREVENTIVE
MAINTENANCE FREQ. INSTRUCTIONS
Case Exterior Quarterly Under Case Cleaning:Whenever accessing condensate pump pan at
underside of case, vacuum (or use broom) under the case to remove all
dust, debris and dirt that may collect.
Quarterly Condensate Pan (or Hot Gas Loop Condensate Pan):
 Warning! Condensate Pans Are HOT! Disconnect power from case
and allow to cool before cleaning!
 See CASE STARTUP & REFRIGERATION PACKAGE ACCESS
section for in-depth instructions on accessing the condensate pans.
 Use a scrub-brush and a de-scaling solution such as CLR® (to
prevent corrosion, lime and rust). Follow instructions as to proper
dilution, safety precautions and scrubbing method.
 If condensate pan can be removed from case (should thorough
cleaning require removal), disconnect pan from unit and clean
accordingly. Caution! Due to electrical components, do not
submerse in water! Reattach to case after cleaning.
 Hot gas condensate loop pan (and its accompanying electric coil
overflow pan) is not removable from case. After thoroughly cleaning
pan with scrub-brush and solution, rinse thoroughly with clean water
(using spray bottle) and wipe dry with sponge or paper towel.
Case Interior Quarterly Tub, Coil, Drain, Fan Blades, Motors, Brackets:
Disconnect power from the case before cleaning the Tub, Coil, Fan,
Motor and Drain Area!
 Remove Decking, Sub-Deck (if any) and Fan Shroud.
 Use vacuum to clean Evaporator Coils.
 Clean Tub, Coil and Drain with warm water, clean cloth, brush and
mild soap solution.
 Remove any debris that may clog drain.
 Wipe down Fan Blades, Motors and Brackets with moist cloth.
 Replace Decking, Sub-Deck (if any) and Fan Shroud.
Quarterly Honeycomb:Check honeycomb air diffuser to determine if it is dirty.
If dirty, remove from case. See HONEYCOMB AIR DIFFUSER
ACCESS / REMOVAL / INSTALLATION section of this manual for
cleaning specifics.

18
TROUBLESHOOTING (TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY)
CONDITION TROUBLESHOOTING
Water Is On The Floor Check that the drain trap is free of debris.
Check that the drain hose is correctly positioned over evaporator pan.
Check store conditions.
 For NSF® Type 1 Conditions (most cases): ambient conditions are to
be at 55% max. humidity / 75°F.
 For NSF® Type 2 Conditions: ambient conditions are to be at 60%
maximum humidity / 80°F.
Check that the hot gas condensate pan is properly connected.
Check that evaporator pan is heating properly.
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 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.
Case Lights Are Not
Working Check that light switch is in the on position.
Check that ALL of the light cords and plugs are properly connected. See
LIGHT FIXTURES/LIGHT SWITCH LOCATION section in this manual
for specifics.
Service Technicians Only: Check voltage at ballasts. If voltage is
entering but not exiting ballast, ballast is faulty.

19
TROUBLESHOOTING (TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY), CONTINUED
CONDITION TROUBLESHOOTING
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
section in manual 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.
If case is located near front doors, temperature fluctuation can hinder unit’s ability
to maintain temperature.
Check that condenser coil has been cleaned.
Check air grilles for obstructions.
Check sight glass for flashing and/or low charge.
Check Set Point Temperature; it may be adjusted too high.
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 - CONDENSING SYSTEM (TRAINED SERVICE PROVIDERS ONLY)
20
TROUBLESHOOTING - CONDENSING SYSTEM (BY TRAINED SERVICE PROVIDERS ONLY)
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.