Southeast Cooler Corporation POLAR TEMP 300AD User manual

6/28/2021

2
Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Inspection and Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4- 5
Before Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5- 9
• Electrical
• Temperature Control – Cold Wall, Automatic Defrost, Electronic Automatic Defrost
• Load with Bagged Ice
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-10
TABLE OF CONTENTS
Cold Wall Wiring Diagram – Mechanical Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Automatic Defrost Wiring Diagram – Mechanical Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Automatic Defrost Wiring Diagram w/ ETC-1H Electronic Control . . . . . . . . . . . . . . . . . . . . . . 13
Automatic Defrost Wiring Diagram w/ERC112C Electronic Control . . . . . . . . . . . . . . . . . . . . . 14
Cold Wall Wiring Diagram w/ERC101A Electronic Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Automatic Defrost Trouble Shooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Cold Wall Troubleshooting Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Refrigeration and Electrical Diagnostic Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 - 19
Refrigeration Data and Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 - 25
Policy Statement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 - 27
• Refrigeration
- Defrosting
- Cold Wall (CW)
- Auto Defrost (AD)
• Doors
- Gaskets
- Hinges
- Finish
• Warranty
• Parts Orders
• Method of Shipment
• Ship Dates
• Return of Merchandise
• Pricing
Factory Sales Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
• Ordering addresses, telephone numbers and websites

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Polar Temp is committed to continuous material and product improvements.
This manual is subject to modification without notice without incurring
responsibility for previously sold merchandisers and components.
Thank you for purchasing from Polar Temp.
WARNING:
This product contains one or more chemicals known to the State of Califor-
nia to cause cancer.
WARNING:
This product contains one or more chemicals known to the State of Califor-
nia to cause birth defects or other reproductive harm.
DISCLAIMER
State of California Proposition 65
Warnings
Ordering addresses, telephone numbers and websites
Sales Email: [email protected]
Corporate Sales: 1-877-984-5945
Polar Temp Factory Office: 770-819 -1100
Polar Temp Website: www.polartemp.com
Corporate Website: www.secooler.com

4
Polar Temp is committed to continuous material and product improvements.
This manual is subject to modification without notice without incurring re-
sponsibility for previously sold merchandisers and components.
Thank you for purchasing from Polar Temp.
Polar Temp merchandisers are individually inspected and carefully packaged
to ensure each unit arrives without damage.
Install the merchandiser for customer convenience, easy access and
maximum exposure. The location must provide good ventilation for the
refrigeration system. DO NOT BLOCK AIRFLOW TO THE CONDENSING UNIT.
• Upon receipt, immediately inspect the merchandiser for any evidence of
shipping damage while the delivery truck driver is there. If the merchandiser is
damaged, document damage on the bill of lading and give the driver a copy.
Notify the delivering carrier immediately and request a damage inspection
and claim. Polar Temp is not responsible for damage to merchandisers
during transit. A merchandiser damaged in transit is the delivering carrier’s
responsibility.
• Remove plastic stretch wrap and merchandiser corner protectors. The
wooden skid is removed by extracting the hex head screws holding it to the
merchandiser bottom
• The merchandiser should be moved in an upright position. If the merchandiser
is tilted past 45 degrees, it is recommended that it not be used for a time
equal to the time it was tilted. This will allow the compressor lubricant to drain
back to normal position.
INSPECTION AND UNPACKING
INSTALLATION
• Outdoor merchandisers should be placed on a flat, level surface allowing
water drainage away from merchandiser. The surface should also be strong
enough to support the merchandiser with a load of ice. Be sure to check the
load capacity of the merchandiser prior to installation. If the merchandiser
is not level, the self-closing doors on upright models may not close or seal
properly.
• It is essential that auto-defrost models be placed on a level surface or tipped
to the rear slightly to allow defrost drain pan water to drain properly. If defrost
water does not drain, it will freeze in the drain pan which can eventually cause
the fans to seize.
• Auto-defrost models should be installed leaving sufficient distance behind
the merchandiser to prevent the evaporator drain hose from being kinked or
hose opening from being obstructed.

5
Glass Door Models
• Some glass door models have support brackets that need to be removed.
Auto-defrost Glass (ADG) Door Models
• Install condensate evaporator unit on rear of cabinet. Screwdriver is
required.
• Auto-defrost models with a condensate evaporator on the back should
not be placed directly against or touching a wall.
• Adequate space should be allowed around the exterior walls of the
merchandisers to allow for evaporation of any condensation that may
occur on cabinet exterior.
• Outdoor merchandisers should be located in a shaded area away from
direct sunlight for the most economical operation.
• A minimum 115 Volt, 15 Amp grounded power source should be provided
within a range of the power cord. DO NOT USE EXTENSION CORDS.
Electrical
The electrical power supplied to the merchandiser must be as identified on the
serial number data plate located on the inside of the merchandiser. Electrical
service connections must be in accordance with the National Electrical
Code, state code and any local codes that may apply. All merchandisers
are equipped with a power cord and a 3-prong plug. WARNING: Improper
use or removal of the grounding plug can result in a risk of electric shock!
Be sure to use a grounded electrical receptacle with a fused circuit sized correctly
for the electrical load. Do not use extension cords. Extension cords may decrease
the voltage to the unit and ultimately cause the compressor or other component
failure. The merchandiser data plate indicates the recommended maximum over
current protective device size.
Note: Some outdoor locations require ground fault interrupt (GFI) outlets. These
outlets may trip upon condensing unit start. Refrigeration equipment is exempt
in some areas from GFI requirements. Local electric codes should be checked.
Start Up
Plug merchandiser power cord into lower receptacle of electrical outlet. The
condensing unit will start immediately (electronically controlled models have a
delay on startup) and the unit cooler evaporator fans will start on the auto-defrost
models. The condensing unit will continue to run until air temperature inside the
BEFORE OPERATION
OPERATION

6
Minimal temperature adjustment (2 degrees F min/max adjustment) is possible
by turning the thermostat control knob clock-wise for colder temperature and
counter-clockwise for warmer temperatures since the electronic control is pre-
set at the factory. DO NOT adjust the thermostat without consulting Polar Temp.
The electronic control is factory set with a computer therefore there is no need
to make field adjustments. The digital display on your new Polar Temp Ice
Merchandiser will show fault codes and other information as described below:
merchandiser reaches 10º F and then cycle on and off between 10º F and 20º F.
If the merchandiser has a condensate evaporator, plug the power cord from it
into the upper receptacle of electrical outlet.
“E1” on the digital display means “faulty air sensor”
“E2” on the digital display means “faulty defrost sensor”
“---“on the digital display means the refrigeration system has been
“turned off”
Mechanical Temperature Control
Automatic Defrost Models • Previous to November 2010
Merchandiser temperature is maintained by a mechanical thermostat that
cycles the condensing unit on and off automatically. On auto-defrost (AD)
models, the temperature control is located on the left end of the evaporator
blower coil assembly. On cold wall models, the control is located on a bracket
under the condensing unit cover. Most mechanical control models will have the
standard mechanical defrost timer. An electronic defrost timer (AT1032-1 is/was
an option) If AT1032-1 is used, the compressor will start momentarily, turn off and
then go into defrost immediately for 15 minutes to be sure the coil is free of frost
and ice. Every time the unit is switched off then will start a new defrost cycle with
the AT1032-1.
The temperature is adjusted by turning the thermostat control knob clock-wise
for colder temperature and counter-clockwise for warmer temperatures. Turning
the control knob fully counter-clockwise will shut power off to the compressor.
DO NOT re-adjust the internal adjustments of the thermostat without consulting
Polar Temp.
Electronic Temperature Control
Automatic Defrost Models – ETC-1H • November 2010 to March 2012
Merchandiser temperature is maintained by an electronic thermostat that
cycles the condensing unit on and off automatically. On auto-defrost (AD)
models, the temperature control is located on the left end under the hood on
outdoor units and to the left of the condensing unit on indoor skirt hood models.

7
Merchandiser temperature is maintained by an electronic thermostat that cycles
the condensing unit on and off automatically. On auto-defrost (AD) models, the
electronic temperature control is located on the left end under the hood on outdoor
units and to the left of the condensing unit on indoor skirt hood models.
Minimal temperature adjustment (5 degrees F min/max adjustment) is possible
by pressing the up or down arrow buttons for colder or warmer temperatures
since the electronic control is pre-set at the factory. DO NOT adjust the thermostat
without consulting Polar Temp.
The electronic control is factory set with a computer at the factory therefore there
is no need to make field adjustments. The digital display on your new Polar Temp
Ice Merchandiser will show fault codes and other information as described below:
“def” on the digital display means the refrigeration system is in
“defrost cycle”
“E13” on the digital display means “communication error” (cable
between the digital readout and t thecontrol relay is faulty)
“VH” indicates “voltage high”
“VL” indicates “voltage low”
Two buttons on the digital display will do the following:
Pressing both buttons at the same time for 10 seconds will shut the
refrigeration system “OFF” (“---“ shown on the digital display)
Pressing the top button for 10 seconds will give you the option of
temperature display in centigrade (C°) or Fahrenheit (Fº)
Pressing the bottom button for 10 seconds will put the refrigeration
system into a manual defrost (“def” shown on the digital display
The system will automatically return to refrigeration cycle after
temperature 50º F or 15 to 20 minutes is satisfied, whichever comes
first. The system will go into defrost every 60 minutes of “compressor”
run time.
If the electrical power supply is interrupted the electronic control will
always start automatically after a short delay in a new refrigeration
cycle.
“E01” on the digital display means “faulty air sensor”
“E02” on the digital display means “faulty defrost sensor”
“E03” when used is faulty “condenser air sensor”
Electronic Temperature Control
Automatic Defrost Models – ERC102C Controller • Starting March 2012
Automatic Defrost Models – EC112C Controller • Starting May 2015

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Merchandiser temperature is maintained by an electronic thermostat that cycles
the condensing unit on and off automatically. On cold-wall (CW) models, the
electronic temperature control is located on the left end under the hood on
outdoor units and to the left of the condensing unit on indoor skirt hood models.
Minimal temperature adjustment (5 degrees F min/max adjustment) is possible
by pressing the up or down arrow buttons for colder or warmer temperatures
since the electronic control is pre-set at the factory. DO NOT adjust the thermostat
without consulting Polar Temp.
The electronic control is factory set with a computer at the factory therefore there
is no need to make field adjustments. The digital display on your new Polar Temp
Ice Merchandiser will show fault codes and other information as described below:
“E01” on the digital display means “faulty air sensor”
“E03” when used is faulty “condenser air sensor”
“OFF“ on the digital display means the refrigeration system has been
“turned off”
Electronic Temperature Control
Cold Wall Models – ERC101A • Starting May 2012
“OFF“ on the digital display means the refrigeration system has been
“turned off”
“ON“ on the digital display means the refrigeration system has been
“turned on”
“DEF” on the digital display means the refrigeration system is in “defrost
cycle”
“VH” indicates “voltage high”
“VL” indicates “voltage low”
The four buttons on the digital display will do the following:
Press and release the bottom left hand button (“OFF or ON“will show
on the digital display)
Press and release the top left hand button will put the system into
defrost mode (“def” will show on the digital display) The system will
automatically return to refrigeration cycle after 15 minute defrost
period and the coil defrost temperature reaches 55º F. If the defrost
terminate temperature is not 55°F, it will continue to a maximum
of 25 minutes. The system will go into defrost every 120 minutes of
“compressor” run time.
If the electrical power supply is interrupted the electronic control will
always start automatically in the refrigeration cycle after a short
delay.

9
Loading Merchandiser with Bagged Ice
After the merchandiser is operating at required temperature, load it with
bagged ice. Bagged ice should not be stacked such that it will obstruct air flow
in automatic defrost blower coil merchandisers.
Cold wall glass door units should have ice stacked to allow open-air access
to thermostat sensor at upper rear interior. Approximately 3” needs to be clear
from top of stacked ice to top of inside interior for effective refrigeration and ice
storage.
“ON“ on the digital display means the refrigeration system has been
“turned on”
“VH” indicates “voltage high”
“VL” indicates “voltage low”
The four buttons on the digital display will do the following:
Press and release the bottom left hand button (“OFF or ON“ will show on
the digital display)
Manual defrost not active on cold wall units.
Arrow buttons change temperature up or down.
If the electrical power supply is interrupted the electronic control will
always start automatically after a short delay in a new refrigeration
cycle.
MAINTENANCE
Refrigeration: WARNING – disconnect electrical power before cleaning.
Clean refrigeration cover grill openings, condenser fins, and condenser fan
blades at least two (2) times per year, more often if needed. A dirty condenser will
cause the merchandiser to become less efficient, and may lead to compressor
failure. Clean the evaporator coil and fan blades on auto-defrost merchandisers
as required:
Defrosting: Frost cannot be avoided. It develops from moist air entering the
merchandiser when the door is opened and forms on the evaporator. When the
frost accumulation on the evaporator becomes too heavy, it acts as an insulator,
which hinders the refrigeration efficiency.
• Clean condenser coil fins with a fine bristle brush or vacuum
• Routinely check wiring harness for loose connections or broken insulation

10
Cold Wall (CW): Cold Wall type merchandisers utilize the merchandiser’s interior
wall surface as the refrigeration evaporator. Frost accumulation will occur on
all wall surfaces. The merchandiser can be defrosted by conventional methods
using a wooden paddle or plastic scraper. Care must be exercised to prevent
damaging piping and control parts. Do not use a sharp instrument to “chop” the
frost from the interior surface as you may do irreparable damage. Remove the
floor drain plug to allow water to drain.
Auto-Defrost (AD): Auto-Defrost (sometimes referred to as “electric defrost”)
type merchandisers utilize a cooler evaporator with an electric defrost heating
element to melt the frost off the evaporator coil. The defrost cycle is controlled
by the electronic control system which energizes the electric defrost heating
element. The electronic control is located in the condensing unit compartment.
The control is programmed to periodically place the system in a defrost cycle
automatically every two to four hours, depending on your control system, of
compressor run time. The length of the defrost cycle is approximately 14 to 16
minutes minimum and then 55°F at the coil. The electronic control used is non-
adjustable, however, defrost button may be pushed to start a manual defrost
cycle. If your merchandiser has the electronic defrost timer, part number AT1032-1
(not the electronic control system) you may turn the refrigeration system “OFF”
with the toggle switch or unplug the wall plug, then turn it back to the “ON” position
which will automatically start a manually induced defrost cycle.
Doors: Gaskets should be checked for tears or any other problems that would
cause loss of seal. Replace torn/worn gaskets to maintain correct temperature
and refrigeration efficiency.
Hinges exposed to harsh environmental conditions may require a lubricant for
ease of operation. Spray light penetrating oil on the spring loaded hinge cartridge
to extend the hinge life.
Finish: Schedule periodic cleaning of merchandiser interior and exterior. The
cabinet can be cleaned with a mild detergent and water. DO NOT USE strong
detergents, abrasive cleaners, or solvents, likely to leave objectionable odors
which may be absorbed by the ice. Do not use wax or polish on the interior for the
same reason. Wash exterior surfaces with a mild soap and warm water applied
with a soft sponge or cloth. Wax exterior to maintain appearance and to protect
the finish.
• Excess frost or water on the interior of the merchandiser should be removed
or drained. Do not allow water to stand in or around the cabinet.

11
Mechanical Controls - Cold Walls
BLK
WHT
GRN
BLK
CONDENSING
UNIT
THERMOSTAT
PLUG
110V 60Hz
SINGLE PHASE
PART NUMBER (P/N): 0000835

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Mechanical Controls Auto Defrost
CONDENSATE EVAPORATOR
(INDOOR MODELS)
BALLAST
LIGHT
DEFROST TIMER
CONDENSING
UNIT
DEFROST HEATER
DEFROST
TERMINATOR
FAN
MOTOR
CONNECTOR
CONNECTOR
GROUND WIRE
BOND TO CABINET
WIRING HARNESS RECEPTACLE
PLUG
PLUG
TO 115 VAC
TOGGLE
SWITCH
EVAPORATOR ASSEMBLY
THERMOMETER
1
2
3
4
BLU WHT
RED
RED
WHT
RED
YLW
YLW
BLK
RED
RED
BLU
WHT
(LIGHT OPTIONAL)
PART NUMBER (P/N): 0000554

13
Electronic Control Auto Defrost ETC-1H
EMP AP-3-16-1
PVC BLACK
MECHANICAL
STRAIN RELIEF
BLK
GRN
WHT
WHT
GRN
BLK
12/3 SJT/SJTOW-A 105 C
BLACK 144"
1
2
3
4
5
6
ETC-1H
RELAY CONTROL
P/N 0002165
OPEN
COMP.
LOAD
HEATER
NEUTRAL
FAN
18/2 4/64 105 C PVC
BLACK 4"
EMF R-2-38
PVC BLACK
RIB
PLAIN
FAN MOTOR FAN MOTOR
POWER SUPPLY CORD
P/N 0003003
WHT
HARNESS
P/N 0001005
P241-R238-P1
TOGGLE SWITCH
P/N 0000561
#7605K21
FAN MOTOR
S3
S2
S1
WHT
WHT
DEFROST SENSOR
P/N 0002163
AIR FLOW SENSOR
P/N 0002164
AIR FLOW SENSOR LOCATED
IN THE CENTER
DEFROST SENSOR LOCATED IN
THE TOP OF EVAPORATOR COIL,
OR MOUNTED ON REAR OF
DRAIN PAN WIT H SENSOR CLIP.
Coil
DIGITAL DISPLAY
P/N 0002161
59" DISPLAY CABLE
P/N 0002162
BLUE LINE INDICATOR
HEATERS
600W
MAX
HEATERS
1-FAN 400W - P/N 9200005
2-FAN 600W - P/N 9200006
3-FAN 600W - P/N 0002630
YLW
HIGH V
LOW V
LIGHTKIT(OPTIONAL)P/N0002318
BLK
BLK
BLK
BLK
BLK
RED
BLK
BLKBLK
PART NUMBER (P/N): 0003046

14
Electronic Control Auto Defrost ERC112C
ADD CAP
AIR FLOW SENSOR
LOCATED IN CENTER
OF FRONT GRILLE
Air Flow Sensor
P/N 0002164
14ga.
BLK
14ga.
WHT
14ga.
GRN
AR3-2 RECEPTACLE
S1
EMP AP-3-16-1
PVC BLK
POWER SUPPLY CORD
P/N 0003224
MECHANICAL
STRAIN RELIEF
18/2 4/64 105 C PVC
BLK 4"
RIB
PLAIN
1
2
3NEUTRAL
LOAD
COMP.
BRN
BLK
WHT ERC111A
RELAY CONTROL
P/N 0003939
TOGGLE SWITCH
P/N 0000561
#7605621
BLU
BLU
LIGHT KIT (OPTIONAL) P/N 0002318
EMF R-2-38
PVC BLK
HARNESS
P/N 0001005
P241-R238-P1
12/3 SJT/SJTOW-A 105 C
BLK 120"
WHT
GRN
BLK
WHT
HIGH V LOW V
WHT
GRN
BLK
PART NUMBER (P/N): 0003236

15
Electronic Control Cold Wall ERC101A
EMP AP-3-16-1
PVC BLACK
MECHANICAL
STRAIN RELIEF
BLK
GRN
WHT
WHT
GRN
BLK
12/3 SJT/SJTOW-A 105 C
BLACK 120"
1
2
3
4
5
6
ERC112C
RELAY CONTROL
P/N 0003937
Open
Comp.
Load
Heater
Neutral
Fan
18/2 4/64 105 C PVC
BLACK 4"
EMF R-2-38
PVC BLACK
RIB
PLAIN
FAN MOTOR FAN MOTOR
POWER SUPPLY CORD
P/N 0003224
WHT
HARNESS
P/N 0001005
P241-R238-P1
TOGGLE SWITCH
P/N 0000561
#7605K21
FAN MOTOR
WHT
WHT
DEFROST SENSOR
P/N 0002163
AIR FLOW SENSOR
P/N 0002164
AIR FLOW SENSOR
LOCATED IN THE CENTER
OF FRONT GRILLE.
DEFROST SENSOR LOCATED IN
THE TOP OF EVAPORATOR COIL,
OR MOUNTED ON REAR OF
DRAIN PAN WITH SENSOR CLIP.
Coil
BLUE LINE INDICATOR
HEATERS
600W
MAX
HEATERS
1-FAN 400W - P/N 9200005
2-FAN 600W - P/N 9200006
3-FAN 600W - P/N 0002630
HIGH V LOW V
LIGHTKIT(OPTIONAL)P/N0002318
BLK
BLK
BLU
BLU
BLKBLK
YLW
RED
14ga.
BLK
14ga.
GRN
AR3-2 RECEPTACLE
14ga.
WHT
S1
S2
PART NUMBER (P/N): 0004015

16
AUTOMATIC DEFROST TROUBLE SHOOTING GUIDE
If refrigerant valves must be opened, a qualified technician should be notified to perform the work.
PROBLEM POSSIBLE CAUSE SOLUTION
Ice is melting Power switch is in OFF position.
Ice bags are blocking air flow.
Condenser coil is dirty.
Incorrect refrigerant charge.
Condenser fan motor and
compressor are not running.
Condenser fan motor is not
operating.
Compressor is not operating.
Evaporator fan motor not running.
Check for ice build-up on the
evaporator coil.
Thermostat setting.
Evaporator fan motors are operating
but the fan blade not turning.
Turn switch to ON position
Move ice bags accordingly.
Clean condenser.
Check sight glass when used for bubbles indicating
wrong charge. Add refrigerant. Locate refrigerant
leak.
Check power supply.
Check if defrost timer (mechanical controls) is stuck
in defrost mode.
Check if compressor is hot, this may indicate that
condenser fan motor has failed causing thermal
overload on compressor to trip.
Check electrical power to motor.
Check electrical power to motor.
Check electrical power, relay, overload protector,
start capacitor and compressor motor.
Check power supply to motor Check for faulty fan
motor.
Check power to defrost heater.
Check defrost heater for heat.
Check defrost termination thermostat.
Check defrost timer.
Normal setting is between 4 and 6 on the dial. Jump
terminals on thermostat to check, if unit starts,
replace thermostat.
Check to see if fan blade is slipping on the motor
shaft.

17
COLD WALL TROUBLESHOOTING GUIDE
If refrigerant valves must be opened, a qualified technician should be notified to perform the work.
PROBLEM POSSIBLE CAUSE SOLUTION
Ice is melting Power switch is in OFF position.
Thermostat setting
Condenser coil is dirty.
Incorrect refrigerant charge.
Condenser fan motor and
compressor are not running.
Condenser fan motor is not
operating.
Compressor is not operating.
Evaporator fan motor not running.
Check refrigerant charge
Condenser coil is dirty
Incorrect refrigerant charge
Turn switch to ON position
Thermostat should be set between
between 4 & 6
Clean condenser.
Check sight glass when used for bubbles indicating
wrong charge. Add refrigerant. Locate refrigerant
leak.
Check power supply.
Check if thermostat hasfailed.
Check if compressor is hot which may indicate that
the condenser fan motor has failed causing the
thermal overload in the compressor to trip.
Check electrical power to motor.
Check electrical power, relay, overload protector,
start capacitor and compressor motor.
Check electrical power to compressor. Check relay,
overload protector and start capacitor. Check
compressor motor.
Adjust if necessary
Clean condenser
Check sight glass when used for bubbles
indicating wrong charge. Add refrigerant. Locate
refrigerant leak..

18
REFRIGERATION & ELECTRICAL
DIAGNOSTIC GUIDE
PROBLEM POSSIBLE CAUSE SOLUTION
Compressor
will not start
(no hum)
Be sure power is being
supplied to the merchandiser
Ambient colder than thermostat
setting
Thermostat stuck in open position
Wiring improper or loose
Compressor motor has a winding
open or shorted
Internal mechanical trouble in
compressor
Unit is in defrost open position
Overload protector stuck in
Check power cord
Check plug in
Check breaker switch
Adjust thermostat if necessary
Replace thermostat
Check actual wiring against diagram
Replace compressor
Replace compressor
Allow defrost cycle to complete, usually 15-20
minutes, or turn manual control on defrost
Replace overload protector

19
REFRIGERATION & ELECTRICAL
DIAGNOSTIC GUIDE (Cont.)
PROBLEM POSSIBLE CAUSE SOLUTION
Compressor
will not start
(hums, but
trips on
overload
protector)
Improperly wired
Low voltage to unit
Improperly wired
Relay failing to open
Compressor motor has a winding
open or shorted
Internal mechanical trouble in
compressor
Starting capacitor defective
Relay failing to close
Check actual wiring against diagram
Check power supply. Contact Power
Company
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Replace compressor
Replace compressor
Replace start capacitor
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20
POLAR TEMP ICE MERCHANDISER REFRIGERATION DATA & SPECIFICATIONS
R404A system Electronic Temperature Controlled Automatic Defrost System
Also available for use in high ambient conditions except 3/4 HP systems.
* Actual minimum amp draw may vary.
Model
300AD
300ADG
380AD
400AD
420AD
420ADG
570AD
600AD
630AD
630ADG
650AD
650ADG
670AD
670ADG
850AD
850ADG
850AD
1000AD
850ADG
1000ADG
1000AD
1000ADG
Condensing
Unit
119-2022
119-2022
119-2022
119-2022
119-2022
119-2027
119-2027
119-2027
119-2027
119-2027
119-2027
119-2027
119-2027
119-2032
119-2032
FJAF-0075
FJAF-0075
FJAF-0075
FJAF-0075
119-2032
119-2032
119-2027
HP
1/4
1/4
1/4
1/4
1/4
1/3
1/3
1/3
1/3
1/3
1/3
1/3
1/3
1/2
1/2
3/4
3/4
3/4
3/4
1/2
1/2
1/3
Coil
1 fan
1 fan
1 fan
1 fan
1 fan
3 fan
2 fan
2 fan
2 fan
2 fan
2 fan
2 fan
2 fan
3 fan
3 fan
3 fan
3 fan
3 fan
3 fan
3 fan
3 fan
2 fan
Cap Tube
.036” x 72”
.036” x 72”
.036” x 72”
.036” x 72”
.036” x 72”
.042” x 74”
.042” x 74”
.042” x 74”
.042” x 74”
.042” x 74”
.042” x 74”
.042” x 74”
.042” x 74”
.044” x 74”
.044” x 74”
TX Valve
TX Valve
TX Valve
TX Valve
.044” x 74”
.044” x 74”
.042” x 74”
Defrost
Heater
400W
400W
400W
400W
400W
600W
600W
600W
600W
600W
600W
600W
600W
600W
600W
600W
600W
600W
600W
600W
600W
600W
Refrigerant
Type
404A
404A
404A
404A
404A
404A
404A
404A
404A
404A
404A
404A
404A
404A
404A
404A
404A
404A
404A
404A
404A
404A
Charge
Ounces
12.5
12.5
12.5
12.5
12.5
14.5
15
15
15
15
15
15
15
18
18
21
21
21
21
21
21
13.5
Min.
Amps*
5.8
5.8
5.8
6.4
6.4
7.9
7.6
7.6
7.6
7.6
7.6
7.6
7.6
10.3
10.3
18
18
18
18
10.9
10.9
7.0
Volts
115V
115V
115V
115V
115V
115V
115V
115V
115V
115V
115V
115V
115V
115V
115V
115V
115V
115V
115V
115V
115V
115V
Max.
Amps
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
20
20
20
20
15
15
15