National Luna Trailboss Series User manual

PORTABLE
REFRIGERATION
PORTABLE
REFRIGERATION
TOLL FREE 0800 003 051
Designed & manufactured in South Africa by National Luna
Complies with IEC 60335-2-24 International Safety Standards
Owner’s
Manual
TBNL - Nov 2018
www.outdoorwarehouse.co.za
Pantone 3425 C 75% Black / Pantone Black C - 75%

National Luna Trailboss Series Fridge Manual National Luna Trailboss Series Fridge Manual
Page 3
Page 2
Index Index
Introduction 4
Getting to know your Portable Fridge
• Key Components 5
• Precautions 6
• Securing your Fridge- Base Mounting Plate 6
• Securing your Fridge - Tie-down Straps 7
• Air Flow 7
Installation Guidelines
• Electrical Connections 8
• Fitting an In-line Fuse 8
• Connecting Power 9
• Wiring Specications 9
Operating your Fridge
• Main Control Panel 10
• On / Off Control 10
• Battery Protection Settings 10
• Low Voltage Cut In & Cut Out 11
• Setting the Temperature 11
• Dynamics of Temperature Setting 12
• Temperature Guidelines 12
• Celsius / Fahrenheit Conversion Chart 12
• Smart Compressor Speed Control 13
• Speed Control Setting 13
PORTABLE
REFRIGERATION
PORTABLE
REFRIGERATION
Trouble Shooting
• Indicator Lights 14
• Fault Description 14
• Trouble Shooting 15
General Maintenance
• Removal of Side Cover 16
• Removal of Compressor Electronics 16
• Replacing the DC fuse 16
• Replacing the AC Power Supply 16
• Replacing the Temperature Probe 17
• Cleaning the Condenser/ Replacing the Fan 17
• Removing & Replacing the Interior LED Light 17
• Door Seal & Adjustment 18
• Removing & Replacing Door Seal 18
Option 1 - 60x20mm Option 2 - 60x40mm
YOU ARE SOLELY AND COMPLETELY
RESPONSIBLE FOR THE CORRECTNESS OF
THIS PROOF AND THE FINAL PRINTED MATTER.
FAILURE ON YOUR PART TO CHECK A FINAL
PROOF DOES NOT DIVEST YOU OF THIS
RESPONSIBILITY. CHECK THE LAYOUT,
COLOURS, SPELLINGS, SIZES AND TYPE FACES
WITH GREAT CARE AND SHOW ALL CHANGES
AND CORRECTIONS CLEARLY.
GO AHEAD
ALTERATIONS TO BE MADE
SIGNED:
DATE:
031 563 9104
PRINT WRIGHT
FROM:
CLIENT NAME:
PLEASE READ WELL
PLEASE READ WELL
Dieline
Pantone 151c
Black
Dieline
Pantone 151c
Black
Transparent Blue
Grey
New white
Substrate: White Auto
Option 1 - 60x20mm Option 2 - 60x40mm
YOU ARE SOLELY AND COMPLETELY
RESPONSIBLE FOR THE CORRECTNESS OF
THIS PROOF AND THE FINAL PRINTED MATTER.
FAILURE ON YOUR PART TO CHECK A FINAL
PROOF DOES NOT DIVEST YOU OF THIS
RESPONSIBILITY. CHECK THE LAYOUT,
COLOURS, SPELLINGS, SIZES AND TYPE FACES
WITH GREAT CARE AND SHOW ALL CHANGES
AND CORRECTIONS CLEARLY.
GO AHEAD
ALTERATIONS TO BE MADE
SIGNED:
DATE:
031 563 9104
PRINT WRIGHT
FROM:
CLIENT NAME:
PLEASE READ WELL
PLEASE READ WELL
Dieline
Pantone 151c
Black
Dieline
Pantone 151c
Black
Transparent Blue
Grey
New white
Substrate: White Auto
Care and Cleaning 19
National Luna Warranty
• South Africa Only - 3 Year Comprehensive 20
• Compressor warranty - 8 Year Limited 21
• International Warranty 21
Technical Specications
• Dimensions 22
Safety Precautions
• Disposing of your old appliance 23

National Luna Trailboss Series Fridge Manual National Luna Trailboss Series Fridge Manual
Page 5
Page 4
1 Lid
2 LED Interior light
3 Lid locking latch
4 Cabinet exterior
5 Control panel
6 4 baskets
7 Cooling bin (Evaporator)
8 Carry handles
9 Compressor area
10 DC input with fuse (15A)
11 AC input
Getting to know your portable FridgeIntroduction
In 2018 Outdoor Warehouse commissioned National Luna to manufacture a unique
Stainless Steel chest-type refrigerator/freezer exclusively for their customers.
Developed for performance at high ambient temperatures, minimum power
consumption and high operating efciency, these single compartment Fridges are
recognised as the most powerful in the world.
Utilizing world-class technology, all refrigerator models are built using high quality
materials, unique assembly techniques and strict testing procedures to ensure the
highest level of quality and performance.
The use of a custom-designed digital thermostat and smart control circuitry ensures
temperature stability. Low power consumption is achieved using 42mm high-density
insulation and a very compact design.
National Luna is a South African company and was established in 1987.
In 1989 the company expanded into manufacturing high efciency chest-type
refrigeration for the solar power medical vaccine industry.
The National Luna range of portable Fridges and Freezers are high-performance,
high efciency refrigerators ideal for extreme conditions and applications that
operate off battery power, such as off-road vehicles, caravans and solar installations.
With the aid of an integrated electronic thermostat this unit can be accurately set
as a Fridge or as a Freezer (+20°C to -30°C).
1
7
6
5
4
10
11
3
2
9
8
Option 1 - 60x20mm Option 2 - 60x40mm
YOU ARE SOLELY AND COMPLETELY
RESPONSIBLE FOR THE CORRECTNESS OF
THIS PROOF AND THE FINAL PRINTED MATTER.
FAILURE ON YOUR PART TO CHECK A FINAL
PROOF DOES NOT DIVEST YOU OF THIS
RESPONSIBILITY. CHECK THE LAYOUT,
COLOURS, SPELLINGS, SIZES AND TYPE FACES
WITH GREAT CARE AND SHOW ALL CHANGES
AND CORRECTIONS CLEARLY.
GO AHEAD
ALTERATIONS TO BE MADE
SIGNED:
DATE:
031 563 9104
PRINT WRIGHT
FROM:
CLIENT NAME:
PLEASE READ WELL
PLEASE READ WELL
Dieline
Pantone 151c
Black
Dieline
Pantone 151c
Black
Transparent Blue
Grey
New white
Substrate: White Auto
Congratulations on the purchase of your
National Luna Trailboss Series portable Fridge/Freezer
Key Components

National Luna Trailboss Series Fridge Manual National Luna Trailboss Series Fridge Manual
Page 7
Page 6
Air Flow
Precautions
When the refrigerator is used in an automotive application, ensure that it is secured
to prevent accidental movement. The carry handles can be used with straps or
tie-downs if necessary.
• A base mounting plate is optional and recommended for most applications.
• Ensure the correct type of cable and connectors are used for installation.
• Ensure that any power leads connected to the refrigerator will not be pulled or
damaged by any movement of the Fridge - especially where slides or drawers are
used.
• Do not use a power lead that is damaged.
• Do not connect the refrigerator to a power source that does not comply with the
input power specications. (Displayed on the Fridge’s rear panel)
• When storing the Fridge, ensure that the lid is propped open to allow for breathing.
Disconnect the appliance from an electrical source. (Note: When the Fridge is
switched off, the interior light will still function if the unit is connected to a power
source).
Spacing 100-200mm
Air Flow
• Allow a 100-200 mm gap around the refrigerator compressor area for ventilation
(Airow). The higher the ambient temperature, the more ventilation space is
required for efcient airow and cooling. (In the case of inefcient airow and
cooling, the compressor will automatically shut down - see page 15 for
Trouble Shooting).
• Do not block or cover the ventilation holes. (During off-road conditions items may
become lodged around the cooling area).
Getting to know your portable FridgeGetting to know your portable Fridge
A low-prole design with locking pin, this base offers a xed mounting position
with an easy to remove mechanism. The optional base mounting plate allows the
refrigerator to be securely fastened to the oor or body of the vehicle.
The unique locking design ensures that the Fridge remains xed in position.
6mm lock nut
M6 x 20 Flat Washer
Securing your Fridge in a vehicle using a Base Mounting Plate
Sturdy and functional carry handle.
A hold down strap can be tted in the
slot provided as indicated.
(Care must be taken not to
over-tighten the hold-down strap
when using a ratchet device.)
Securing your Fridge in a vehicle using Tie-Down Straps

National Luna Trailboss Series Fridge Manual National Luna Trailboss Series Fridge Manual
Page 9
Page 8
Electrical Connections
When installing the refrigerator into a vehicle for the rst time, ensure that the
electrical connections to the vehicle’s battery are secure and the specied wiring
is used. (See wiring guidelines on page 9)
The fridge is supplied with a power lead for use with a 12 Volt DC supply.
This power lead is terminated with a high-quality male plug for connection into
your vehicle.
1. Install the supplied female
socket into your vehicle
in a convenient location.
2. Use a suitable cable to connect the
socket to the vehicle’s battery.
A cable thickness of 4mm2or greater
is recommended.
Centre pin (+)
Fitting an in-line fuse
Although the fridge has a built-in fuse, it
is recommended to install an additional
fuse on the positive wire as close to
the battery as possible. This will protect
against short-circuits that may occur
along the length of the cable.
Ensure that all connections are
properly crimped and insulated.
If you choose to change the attached plug on the DC cable for a different type,
rst ensure that the power has been disconnected before cutting it.
Split and strip the wires as required for the new plug. Take care to ensure that the
correct polarity is used on the plug and crimp the connections where possible.
An automotive fuse with a rating
of 15A is recommended
When installing electrical outlets in your vehicle, do
not rely on the vehicle’s body for an electrical earth.
Male Plug
Female Socket
This Fridge can accept a DC voltage
ranging from 9.6V to 17V, as well as an
AC voltage range from 85V to 265V.
The 12Vdc power input is protected
with a 15A automotive blade fuse.
An AC and DC source can be connected
to the refrigerator simultaneously. Under
these conditions, the AC supply will be
chosen as the primary power source.
If the AC supply is interrupted, the DC
supply will be automatically selected
and operation will continue normally.
(After a 1 minute delay)
Suggested Wiring Specications / Guidelines
One of the most problematic issues with installing a 12 Volt refrigeration system
is incorrect wiring. Most users do not understand the importance of maintaining
battery voltage over the distance from the battery to the installed Fridge.
While most car cigarette lighter sockets appear to be adequate, in practise a
large voltage drop occurs between the socket and the car battery. This may
result in the fridge shutting down as a result of a low-voltage condition.
It is recommended the following table be used as a guide to establish what cable
thickness is to be used depending on the distance from the car battery to the
fridge. As a rule of thumb one should use a 1.0 mm2multi-strand copper wire
per meter of distance from the battery.
Note: Two wires (positive & negative) must be connected from the battery to the Fridge / plug point.
Cable Size Max Length between
battery & fridge
Cross Section
mm2
12 Volt Operation
Meters
4 4
6 6
10 10
Connecting power
Installation GuidelinesInstallation Guidelines

National Luna Trailboss Series Fridge Manual National Luna Trailboss Series Fridge Manual
Page 11
Page 10
HIGH
MED
LOW
SPEED CONTROL
THE FRIDGE WILL AUTOMATICALLY CUT-OUT AT THE
SELECTED BATTERY PROTECTION LEVEL.
LOW WILL ALLOW THE BATTERY TO BE COMPLETELY DRAINED.
PRESS THE TURBO BUTTON TO OVER-RIDE
AUTOMATIC SPEED CONTROL
THE FRIDGE AUTOMATICALLY SELECTS VARIOUS SPEEDS TO
MAINTAIN THE DESIRED TEMPERATURE.
TURBO
BATTERY PROTECTION
DOWN
UP
“SET MODE” - PRESS DOWN FOR 3 SECONDS
TEMPERATURE
STATUS INDICATORS
RUN FAULT ID
Power ON / OFF
(HOLD FOR 3 SECONDS)
DOWN
UP
“SET MODE” - PRESS DOWN FOR 3 SECONDS
TEMPERATURE
Power ON / OFF
(HOLD FOR 3 SECONDS)
MAXIMUM POWER WILL BE USED IN TURBO MODE
SPEED CONTROL
PRESS THE TURBO BUTTON TO OVER-RIDE
AUTOMATIC SPEED CONTROL
THE FRIDGE AUTOMATICALLY SELECTS VARIOUS SPEEDS TO
MAINTAIN THE DESIRED TEMPERATURE.
TURBO
MAXIMUM POWER WILL BE USED IN TURBO MODE
11.5V
10.5V
9.5V
HIGH
MED
LOW
THE FRIDGE WILL AUTOMATICALLY CUT-OUT AT THE
SELECTED BATTERY PROTECTION LEVEL.
LOW WILL ALLOW THE BATTERY TO BE COMPLETELY DRAINED.
BATTERY PROTECTION
11.5V
10.5V
9.5V
Setting the Temperature
Battery Protection Settings
On / Off Control
Automatic speed control
with TURBO over-ride
Fault identier light
Run status light
Power ON/OFF and
temperature UP control
Temperature display
SET mode and temperature
DOWN control
Battery protection control
The refrigerator can be turned ON and OFF via
the control panel.
Press and hold the button for 3 seconds
to turn the fridge ON or OFF.
If power to the refrigerator is interrupted, it will
default to ON automatically.
Note: When the fridge is switched off, the
interior light will still function if the unit is
connected to a power source.
The refrigerator is equipped with a multi-level
battery protection circuit.
The user has the choice of three voltage levels
at which the compressor will shut down to
protect against excessive battery discharge.
(See page 11)
To change the protection level, press and hold
the button until the preferred level is reached.
Selecting the “Low” cut-out setting can cause excessive
discharge resulting in damage to the battery.
Note: When changing the protection level the compressor will stop and cut back in a few seconds later.
When powered by an AC source, the battery protection level can be changed but will only
affect operation when the DC source is used.
The digital thermostat tted to this
refrigerator allows accurate setting of the
desired cooling temperatures.
With the single compartment refrigerators,
temperatures can be selected between
+20°C and -30°C in 1°C increments.
When powering up the fridge the rst time, the temperature inside the fridge will be reected on
the display. (NOTE: the previously set temperature will be in memory)
To select the new cooling temperature, press and hold the button until the display starts to
ash. (The previous set temperature will be displayed).
Press or to raise or lower the desired temperature. The thermostat will accept the
new setting and exit the setting mode 10 seconds after the last button was pressed. (It will now
remember the new set temperature).
The temperature display will reect the inner bin temperature prior to the new setting. Provided
the new setting is colder, the compressor will then switch on and cool the fridge further to the set
point. (During this time the run indicator light will be displayed).
Low Voltage Battery Protection Settings
The NL25-C3 Electronic Compressor Driver unit will cut-out at the low / medium / high selected setting.
Once the compressor has cut-out, it will not restart (cut-in) until the voltage rises.
The table below reects the set points.
12 VOLT
Battery
Protection Cut-out Cut-in
LOW 9.6 10.9
MED 10.4 11.7
HIGH 11.3 12.5
Note: these values are measured at the Compressor
Driver unit input. It is important to note that poor /
thin wiring and bad connections to the battery can
cause a large voltage drop. When this occurs the
fridge switches off and will re-start again on a repeat
cycle “hunting”.
NOTE: When connecting the fridge for the rst time, it will look at the cut-in voltage.
If the battery protection is set on “High” the initial cut in voltage will be 12.5.
If the battery is not fully charged the fridge will not start. Simply select “Low” to start.
When selecting “Low” the fridge will operate within a voltage supply of 9.6-17.0 Volt.
Operating your Fridge Operating your Fridge
HIGH
MED
LOW
SPEED CONTROL
THE FRIDGE WILL AUTOMATICALLY CUT-OUT AT THE
SELECTED BATTERY PROTECTION LEVEL.
LOW WILL ALLOW THE BATTERY TO BE COMPLETELY DRAINED.
PRESS THE TURBO BUTTON TO OVER-RIDE
AUTOMATIC SPEED CONTROL
THE FRIDGE AUTOMATICALLY SELECTS VARIOUS SPEEDS TO
MAINTAIN THE DESIRED TEMPERATURE.
TURBO
BATTERY PROTECTION
DOWN
UP
“SET MODE” - PRESS DOWN FOR 3 SECONDS
TEMPERATURE
STATUS INDICATORS
RUN FAULT ID
Power ON / OFF
(HOLD FOR 3 SECONDS)
DOWN
UP
“SET MODE” - PRESS DOWN FOR 3 SECONDS
TEMPERATURE
Power ON / OFF
(HOLD FOR 3 SECONDS)
MAXIMUM POWER WILL BE USED IN TURBO MODE
SPEED CONTROL
PRESS THE TURBO BUTTON TO OVER-RIDE
AUTOMATIC SPEED CONTROL
THE FRIDGE AUTOMATICALLY SELECTS VARIOUS SPEEDS TO
MAINTAIN THE DESIRED TEMPERATURE.
TURBO
MAXIMUM POWER WILL BE USED IN TURBO MODE
11.5V
10.5V
9.5V
HIGH
MED
LOW
THE FRIDGE WILL AUTOMATICALLY CUT-OUT AT THE
SELECTED BATTERY PROTECTION LEVEL.
LOW WILL ALLOW THE BATTERY TO BE COMPLETELY DRAINED.
BATTERY PROTECTION
11.5V
10.5V
9.5V
HIGH
MED
LOW
SPEED CONTROL
THE FRIDGE WILL AUTOMATICALLY CUT-OUT AT THE
SELECTED BATTERY PROTECTION LEVEL.
LOW WILL ALLOW THE BATTERY TO BE COMPLETELY DRAINED.
PRESS THE TURBO BUTTON TO OVER-RIDE
AUTOMATIC SPEED CONTROL
THE FRIDGE AUTOMATICALLY SELECTS VARIOUS SPEEDS TO
MAINTAIN THE DESIRED TEMPERATURE.
TURBO
BATTERY PROTECTION
DOWN
UP
“SET MODE” - PRESS DOWN FOR 3 SECONDS
TEMPERATURE
STATUS INDICATORS
RUN FAULT ID
Power ON / OFF
(HOLD FOR 3 SECONDS)
DOWN
UP
“SET MODE” - PRESS DOWN FOR 3 SECONDS
TEMPERATURE
Power ON / OFF
(HOLD FOR 3 SECONDS)
MAXIMUM POWER WILL BE USED IN TURBO MODE
SPEED CONTROL
PRESS THE TURBO BUTTON TO OVER-RIDE
AUTOMATIC SPEED CONTROL
THE FRIDGE AUTOMATICALLY SELECTS VARIOUS SPEEDS TO
MAINTAIN THE DESIRED TEMPERATURE.
TURBO
MAXIMUM POWER WILL BE USED IN TURBO MODE
11.5V
10.5V
9.5V
HIGH
MED
LOW
THE FRIDGE WILL AUTOMATICALLY CUT-OUT AT THE
SELECTED BATTERY PROTECTION LEVEL.
LOW WILL ALLOW THE BATTERY TO BE COMPLETELY DRAINED.
BATTERY PROTECTION
11.5V
10.5V
9.5V
Main Control Panel

National Luna Trailboss Series Fridge Manual National Luna Trailboss Series Fridge Manual
Page 13
Page 12
The compressor is controlled by the digital thermostat setting. It has a unique Multi - Speed
(2,000 - 3,500 rpm) capability which makes it ideal for use in all mobile applications up to an angle of
35 degrees. It can function efciently in extreme conditions where it is not uncommon to have ambient
temperatures above 40ºC.
Inner Bin / Cooling Compartment
To control temperature, the thermostat sensor must be placed in a position in order to take a
temperature reading.
For practical purposes National Luna has elected to place this temperature sensor on the metal surface
forming the interior bin of the Fridge/Freezer. Thus the switching on and off of the compressor will be
controlled by the bin surface area temperature.
The inner volume of the cooling bin (i.e. core/centre temperature) will take time to “pull down” to
equalise the bin temperature. (In practise it is common that the set temperature will be within 3ºC of the
core temperature).
Ambient temperatures surrounding the Fridge must also be taken into consideration. Very high outside
temperatures will play a major role in the running time of the fridge. (e.g. The fridge will run longer to
maintain or reach the target temperature set).
Selecting the “Turbo” mode will override the Smart Compressor
Speed Control function and the unit will run at maximum speed
For situations where maximum cooling power is
required, press and hold the “Turbo” button until the
indicator is illuminated.
This will bypass automatic control and force high
speed operation.
• Logic 1 (Setting the bin temperature in a range of +20ºC to -11ºC).
The compressor will operate at 3 speeds: low 2,000 rpm, medium 2,750 rpm and high 3,500 rpm.
When the inner bin temperature is warm, the Fridge will automatically run at full speed to bring the
inner bin temperature down as fast as possible. It will then step down to medium speed to reach the set
temperature point where the fridge will then switch off. The temperature will then be maintained at low speed.
This logic makes the Fridge operate and maintain the desired bin temperature under all ambient
temperature conditions optimising performance and efciency.
Should the temperature of the fridge contents change, such as when fresh foodstuffs are added, the
fridge will automatically speed up to cool the new contents.
• Logic 2 Deep Freezing (Setting temperature below -11ºC).
When temperatures are set below -11ºC, the Smart Compressor Control will operate at high speed to
bring temperature down as fast as possible to the desired set point. Thereafter the temperature will be
maintained at medium speed.
3°C to 6°C
0°C to 4°C
-6°C to -11°C
-18°C
Fresh fruits & vegetables
Dairy products
Smoked / prepared meats
Cold beverages
Short-term frozen meats
Frozen meats and sh
Ice cream / frozen desserts
Recommended choice of temperatures
The following table is a guideline to setting
the correct temperature range for different
foodstuffs.
60
43
32
12
6
0
-6
-12
-18
-24
-30
140
109.4
89.6
53.6
42.8
32
21.2
10.4
-0.4
-11.2
-22.0
ºC ºF
HIGH
MED
LOW
SPEED CONTROL
THE FRIDGE WILL AUTOMATICALLY CUT-OUT AT THE
SELECTED BATTERY PROTECTION LEVEL.
LOW WILL ALLOW THE BATTERY TO BE COMPLETELY DRAINED.
PRESS THE TURBO BUTTON TO OVER-RIDE
AUTOMATIC SPEED CONTROL
THE FRIDGE AUTOMATICALLY SELECTS VARIOUS SPEEDS TO
MAINTAIN THE DESIRED TEMPERATURE.
TURBO
BATTERY PROTECTION
DOWN
UP
“SET MODE” - PRESS DOWN FOR 3 SECONDS
TEMPERATURE
STATUS INDICATORS
RUN FAULT ID
Power ON / OFF
(HOLD FOR 3 SECONDS)
DOWN
UP
“SET MODE” - PRESS DOWN FOR 3 SECONDS
TEMPERATURE
Power ON / OFF
(HOLD FOR 3 SECONDS)
MAXIMUM POWER WILL BE USED IN TURBO MODE
SPEED CONTROL
PRESS THE TURBO BUTTON TO OVER-RIDE
AUTOMATIC SPEED CONTROL
THE FRIDGE AUTOMATICALLY SELECTS VARIOUS SPEEDS TO
MAINTAIN THE DESIRED TEMPERATURE.
TURBO
MAXIMUM POWER WILL BE USED IN TURBO MODE
11.5V
10.5V
9.5V
HIGH
MED
LOW
THE FRIDGE WILL AUTOMATICALLY CUT-OUT AT THE
SELECTED BATTERY PROTECTION LEVEL.
LOW WILL ALLOW THE BATTERY TO BE COMPLETELY DRAINED.
BATTERY PROTECTION
11.5V
10.5V
9.5V
Speed Control Setting
Temperature Guidelines
Dynamics of Temperature Settings
Operating your Fridge Operating your Fridge
Introduction to Smart Compressor Speed Control
Conversion Chart
On initial plug-in, the compressor will have a one minute time delay before starting.
At the start of each cycle the Fridge will automatically run at low speed for 3 minutes to equalize
the pressure in the system.
This Fridge is tted with a Smart Compressor Speed Control function which will vary the speed of the
compressor in order to conserve power and optimise performance.

National Luna Trailboss Series Fridge Manual National Luna Trailboss Series Fridge Manual
Page 15Page 14
RUN - This indicator will be illuminated whenever the fridge compressor is running
and the compartment is being cooled.
FAULT ID - This indicator is used to identify fault conditions that may occur with the
refrigerator such as low power supply.
This indicator will ash a pre-determined number of times every 4-seconds
when a particular fault occurs (see table below).
1Low voltage. This is shown when the DC supply voltage is low. The battery could be
at, wiring losses are too high or there is a poor connection to the power source.
2Fan over-current cut-out. There is a problem with the ventilation fan. It is possible that
the ventilation fan is damaged.
3Motor start error. The compressor has not started successfully. This can happen in
extreme environments where the refrigerator is heavily loaded & temperature is very high.
4Minimum speed error. The motor cannot maintain a minimum speed of 1900 rpm.
This can be the result of an internal electronics failure.
5Thermal cut-out. The electronic circuitry has over-heated. This happens in very hot
environments. This can occur when the fridge is over-loaded with warm contents and
the ambient temperature is high. The electronics will re-set when the temperature
has dropped.
6Electronic Compressor Driver hardware failure.
NUMBER OF FLASHES
FAULT DESCRIPTION
Indicator Lights
Trouble Shooting
HIGH
MED
LOW
SPEED CONTROL
THE FRIDGE WILL AUTOMATICALLY CUT-OUT AT THE
SELECTED BATTERY PROTECTION LEVEL.
LOW WILL ALLOW THE BATTERY TO BE COMPLETELY DRAINED.
PRESS THE TURBO BUTTON TO OVER-RIDE
AUTOMATIC SPEED CONTROL
THE FRIDGE AUTOMATICALLY SELECTS VARIOUS SPEEDS TO
MAINTAIN THE DESIRED TEMPERATURE.
TURBO
BATTERY PROTECTION
DOWN
UP
“SET MODE” - PRESS DOWN FOR 3 SECONDS
TEMPERATURE
STATUS INDICATORS
RUN FAULT ID
Power ON / OFF
(HOLD FOR 3 SECONDS)
DOWN
UP
“SET MODE” - PRESS DOWN FOR 3 SECONDS
TEMPERATURE
Power ON / OFF
(HOLD FOR 3 SECONDS)
MAXIMUM POWER WILL BE USED IN TURBO MODE
SPEED CONTROL
PRESS THE TURBO BUTTON TO OVER-RIDE
AUTOMATIC SPEED CONTROL
THE FRIDGE AUTOMATICALLY SELECTS VARIOUS SPEEDS TO
MAINTAIN THE DESIRED TEMPERATURE.
TURBO
MAXIMUM POWER WILL BE USED IN TURBO MODE
11.5V
10.5V
9.5V
HIGH
MED
LOW
THE FRIDGE WILL AUTOMATICALLY CUT-OUT AT THE
SELECTED BATTERY PROTECTION LEVEL.
LOW WILL ALLOW THE BATTERY TO BE COMPLETELY DRAINED.
BATTERY PROTECTION
11.5V
10.5V
9.5V
PROBLEM POSSIBLE CAUSE REMEDIAL ACTION
The fridge will not run
when connected to 12V,
but only when connected
to 230V mains.
12 Volt polarity reversed.
The battery is discharged.
The DC supply has inadequate
wiring, causing voltage loss.
(See page 9)
Fridge is initially connected to a
battery that is not fully charged.
Check polarity to battery is correct.
Recharge the battery.
Ensure all connections are secure.
Ensure supply has 4mm2wire or
thicker and that the vehicle’s body is
not used as an earth.
Select “Low” on battery protection
(See page 10 and 11)
Fault ID light ashes once
every 4 seconds.
The ventilation fan is
noisy or not running.
The ventilation fan is blocked or
damaged.
There is excessive dust or dirt
build-up on the fan.
Fan damaged.
Check the ventilation fan for
obstructions.
Ensure sufcient space is allowed
around the ventilation area. (page 7)
If the fan is broken, return the
refrigerator to an authorised agent
for repair (page 17).
The Fault ID light is
ashing twice every
4 seconds.
The Fault ID light is ashing 3
times every 4 seconds.
The compressor failed to start
correctly.
High pressure due to over-load
or Electronic Compressor Driver
failure.
Under high pressure conditions this
fault will rectify itself automatically
when gas pressures equalise.
Continuous 3-ash conditions may
require Electronic Compressor
Driver replacement by an authorised
service agent. (Page 16)
The Fault ID light is
ashing 4 times every
4 seconds.
The compressor is not maintain-
ing the correct minimum speed.
Continuous 4-ash conditions may
require Electronic Compressor
Driver replacement by an authorised
service agent.
The Fault ID light is ashing
5 times every 4 seconds.
Compressor area is over-heated.
The cooling fan is in-operative.
Ambient temperature very high.
Fridge over-loaded.
Check fan. Check for inadequate
ventilation (See page 7)
Wait for ambient temperature to
drop. (See page 17)
The Fault ID light is ashing
6 times every 4 seconds.
Electronic Compressor Driver
failure (controller detects
abnormal parameters.)
Replace NL25-C3 Compressor
Driver (see page 16)
The thermostat display is
showing “ Prf “
The internal temperature probe is
faulty, damaged or disconnected.
Contact a National Luna service
agent for a probe replacement.
In abnormally high temperature conditions, the compressor may switch off for one minute
and then attempt to restart. It will continue to do so until temperature conditions improve.
In the event of unusual or undesired operation, consult the table below before contacting a service agent.
Trouble Shooting
Status indicators will identify the
current operation of the refrigerator.
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i

National Luna Trailboss Series Fridge Manual National Luna Trailboss Series Fridge Manual
Page 17
Page 16
General Maintenance General Maintenance
Removal of Side Cover
Tip refrigerator so that the grill area is at the top. (Pic 1) Remove the screws from the face
plate (4x M3 screws) and from the power inlet area (2x M3 screws - Pic 2). Then remove the
screws from the base plate (6x M5 screws - Pic 3). The grill will now slide away easily. (Pic 4)
3
1
6
24
5 7 8
Removal of the Electronic Compressor Driver
It will be necessary to remove the colour coded wiring from the electronics using a pair of
long nosed pliers (Pic 5). Using a screw driver, remove the mounting screw that holds the
Electronic Compressor Driver (Pic 6). Remove the Electronic Compressor Driver and the
3 pin coupler as shown (Pic 7). When re-connecting new electronics take care to adhere to the
wire colour coding. (Pic 8)
Incorrect connection may cause irreparable damage to the electronics
Replacing the DC inlet fuse
See pic 10 for DC removal and replacement of the blue 15 Amp automotive blade fuse.
Replacing the AC Power supply
Disconnect the cables and slide out the power supply to replace.
Disconnect the Power Supply
Failure to disconnect the power supply may
result in electrical shock or personal injury.
!
Cleaning the Condenser / Replacing the Fan
Fluff and dust can collect around the fan and condenser area which can choke the air ow and
affect the fridge performance (Pic 15).
The fan is attached to the condenser unit. In order to access the fan, the compressor has to be
removed. Loosen the compressor mounting bolts (Pic 14) then proceed to swing the compressor
outwards (Pic 16). Remove the fan and replace (Pic 17).
Using a small screw driver, push up the clip that holds the LED housing in place.
(Pic 19). Unclip the wires and replace the unit (Pic 20)
The temperature probe (Pic 11) is inserted into the refrigerator box and clips onto the face plate
PCB. A soft putty compound is pressed around the probe cable to prevent condensation / water
ingress. Ensure that the new probe is inserted to the same depth as the original probe.
11
14
19 20
16 17
15
109
This area to be kept clean
Removing & replacing the interior LED light
12
21
Replacing the temperature probe
+
F+
F-
D
C
P
T
-
BLACK
RED
Fan +
Fan -
GREEN
BROWN
BLUE
WHITE
Compressor Driver
NL25-C3
Size : 36mm x 65mm
Colours : Black on Silver

National Luna Trailboss Series Fridge Manual National Luna Trailboss Series Fridge Manual
This refrigerator utilises a multi-cavity door seal which gives excep-
tional sealing capability. Under hot conditions, and after loading
the fridge, the door could be “sucked” closed. (A vacuum is formed
inside the Fridge causing difculty to open and a temporarily loose
latch condition).
The material used tends to be soft and pliable under warm
conditions and may harden during cold/winter conditions
tending to retain it’s compressed state.
(The door latch can be slightly loose under this condition).
By carefully using a hair dryer the seal can be softened
and returned to it’s expanded state.
It is very simple to adjust the door lid hinges at the rear of the fridge to compensate
for this “play/loose door latch condition”. Loosen the screws of the door hinges on
the main body of the fridge (bottom part of the hinge) Lightly depress the back of
the door lid evenly on it’s length and re-tighten the screws. The door latches will
now be tight.
Page 19
Page 18
Your refrigerator should be cleaned in the following manner, both on installation
and when defrosting. It is important that you keep the inside and outside of your
refrigerator/freezer clean to prevent bacteria and odours from forming.
Interior:
Wash the interior of the refrigerator with a mild household cleaner (dishwashing
liquid) or 2 tablespoons of bicarbonate of soda diluted in 250mI of warm water.
Rinse with warm water and dry.
Fridge / Freezer Odours:
Place an open container of Bicarbonate of Soda into your fridge or freezer to
absorb odours. Stir every two weeks and replace every two months.
Exterior:
Wash the exterior with the same solution as for the interior.
N.B. DO NOT use a garden hose to wash the refrigerator exterior as this
could jet water into the electronics.
DON’TS
• Use coarse abrasive powders
• Use metallic scourers (or brushes with
metal bristles)
• Use the “Silver Cleaners”
• Use any ammonia based cleaning agents
DO’S
• Routine simple and gentle cleaning
• Use cleaners showing “Suitable
For Stainless Steel”
• Employ repeated Routine Cleaning
rather than an aggressive single cleaning
Remove all food and disconnect the power source before cleaning.
Do not use any ammonia based cleaning products as this may have
an adverse chemical reaction with plastic components.
Do not dry the fridge in direct sunlight.
Loosen, adjust lid,
and re-tighten screws.
General Maintenance Care and Cleaning
Door seal and adjustment (Loose latch condition)
Removing & replacing multi-cavity door seal
Over time the door seal adopts and moulds/compresses itself into a xed shape.
Simply pull the seal from a corner and remove. One can clean the seal and
place it in the sun to soften the material. It can also be softened using a hair
dryer to attain it’s uncompressed state. Ret the seal by simply pressing it back
in place.
Because of its reputation for durability, Stainless Steel is sometimes assumed to
be indestructible, and therefore subjected to misuse or even abuse. Care should
be taken to avoid such “abnormal” use.
• Avoid prolonged contact with heavily spiced or salty food, raw bloody
meat, some salad dressings, citrus juice (especially lemon juice), etc.
• Do not leave ordinary steel or cans in contact with stainless steel under
damp conditions as an electrolytic reaction occurs and causes stains.
ROUTINE CLEANING: Stainless Steel’s best friends are quite simply soap, or
mild diluted detergent in warm water, applied with a soft cloth or synthetic sponge.
Occasionally the use of a ne synthetic scourer (green “Scotch-Brite”™) or a
brush with nylon bristles may be used. Rinse well, dry with a soft cloth.
Stainless Steel - (Grade 430)

National Luna Trailboss Series Fridge Manual National Luna Trailboss Series Fridge Manual
Page 21
Page 20
This National Luna Warranty supersedes any other advertised Guarantee or
Warranty provided with this appliance by any wholesaler or retailer.
National Luna warrants this product to be free from defects in materials and / or workmanship
under normal use and service to the original purchaser subject to the following :
1. At any time within THREE YEARS from the date of purchase by the original purchaser,
National Luna will at its discretion replace or repair without cost to the owner, through
an authorised service agent, any part found to be defective by National Luna.
2. This warranty does not apply to light bulbs, fuses, cooling fans or items where the length of
life depends on the amount of use and care given.
3. This warranty is valid in South Africa only.
4. National Luna may consider a warranty void if modications have been made to this
appliance which may cause undesirable or hazardous operation or may be the cause of
the malfunction of this product.
5. National Luna shall not be responsible for any damages of any kind resulting from incorrect
voltages or faults with regards to power supply which fall outside of the appliance operating
specications.
6. National Luna shall not be responsible for damage to the appliance caused by negligent
use, storage of hazardous chemicals, use of corrosive substances, re, ood,
civil-disturbances, lightning or any other natural phenomenon.
7. Warranty returns to the factory for repairs - in the event where the unit has been shipped to
the factory for repairs, transport costs will be for the owners account.
8. National Luna will not accept any responsibility for the consequential loss or damage
caused by, or due to the malfunctioning of this appliance.
9. National Luna shall not be held responsible for any injuries to persons caused by the
incorrect or negligent usage of this appliance.
10. Repair work to be done in terms of this warranty must be referred to National Luna for
written authorisation before any work is carried out.
11. National Luna reserves the right to refuse repair or service under warranty if the Warranty
registration card or original proof of purchase cannot be produced.
12. Proof of purchase and purchase date must be presented with submission of a warranty
claim. All refrigerators have a unique serial number.
(Removal of the serial number on the appliance will render this warranty void).
NATIONAL LUNA LIMITED WARRANTY
SOUTH AFRICA (Only)
This National Luna Warranty in South Africa cannot be applied outside
the South African borders for practical reasons.
1. National Luna has a world wide distributor network. These distributors import products and
carry the warranty (at their cost) in line with the various countries conditions of sale.
2. Cross border customs and duties apply. A National Luna manufactured product that is
returned to the factory in South Africa will have the South African warranty applied.
However, all transport costs incurred will be for the purchaser’s account.
3. It is important to note that a private purchase of a refrigerator in South Africa and exported
will not carry a warranty. Any labour repairs and parts required would incur costs in foreign
currency and be for the owner’s account.
4. In the event of a National Luna refrigerator being tted as standard equipment in
caravans and trailers and subsequently being exported from South Africa, the warranty
must be carried by the persons responsible for importing into a country other than
South Africa.
5. It is recommended that National Luna products be purchased from the authorised importer
of that particular country who would carry the applicable warranty and back-up service.
NATIONAL LUNA LIMITED WARRANTY
INTERNATIONAL
1. The National Luna compressor has a 3-year manufacturer’s warranty.
2. Correct completion and submission of the Warranty registration card supplied with this
booklet allows for an additional 5-year warranty to be provided by National Luna on the
compressor.
3. The warranty applies only to household & leisure use.
4. This extended warranty does not cover the product where it has been used in a commercial
application.
For tracking and warranty purposes, please ll in the information below
Serial No :____________________________
Model :______________________________
Date purchased : ______________________
Invoice No : ___________________________
Dealer’s name / Stamp :
Where parts are replaced by an authorised service agent, the labour
account for the work done will be for the owner’s account.
C
O
M
P
R
E
H
E
N
S
I
V
E
F
R
I
D
G
E
W
A
R
R
A
N
T
Y
Y
E
A
R
3
C
O
M
P
R
E
H
E
N
S
I
V
E
F
R
I
D
G
E
W
A
R
R
A
N
T
Y
Y
E
A
R
3
L
I
M
I
T
E
D
C
O
M
P
R
E
S
S
O
R
W
A
R
R
A
N
T
Y
Y
E
A
R
8
L
I
M
I
T
E
D
C
O
M
P
R
E
S
S
O
R
W
A
R
R
A
N
T
Y
Y
E
A
R
8
8YEAR LIMITED
COMPRESSOR WARRANTY

National Luna Trailboss Series Fridge Manual National Luna Trailboss Series Fridge Manual
Page 22
Technical Specications Safety Precautions
600mm
890mm
515mm
400mm
430mm incl. hinges
630mm incl. handles
Dimensions
Interior Bin Dimensions
Exterior Fridge Dimensions
517mm
314mm
297mm
210mm
220mm
392mm
182mm
Page 23
lid open
lid closed
The appliance is not to be used by persons (including children) with reduced
physical, sensory or mental capabilities, or lack of experience and knowledge,
unless they have been given supervision or instruction.
• Children should be supervised to ensure that they do not play with the appliance.
• Appliance shall not be exposed to rain
• Do not store explosive substances such as aerosol cans with a ammable
propellant in appliance.
• This appliance is intended to be used in:
Staff kitchen areas in shops, ofces and other working environments
Farm houses and by clients in hotels, motels and other residential type
environments
Bed and breakfast type environments
Catering and similar non retail applications.
Suitable for camping use
Electrical and electronic appliances often contain materials which, if handled or
disposed of incorrectly, could be potentially hazardous to human health and to
the environment. They are, however, essential for the correct functioning of your
appliance. Therefore do not dispose of it with your household waste.
Please dispose of it at your local community waste collection / recycling centre
and ensure that it presents no danger to children while being stored for disposal.
The plug must be rendered useless and the cable cut off directly behind the
appliance to prevent misuse. Take care not to damage the pipe-work at the back
of it before or during transportation to an authorised collection depot. In this way,
refrigerant in the pipe-work and oil in the compressor will be contained, and will
not leak out into the environment.
Disposing of your old appliance