Denso RT1 User manual

Operation 1
1. oreword 2
2. Inventory 2
3. General Information 3
. Controls 
. Operation 
. Maintenance 10
. Technical Data 11
. Trouble Shooting 13
TALE O CONTENTS
© DENSO AUTOMOTIVE SYSTEMS AUSTRALIA PTY. LTD.
May 
All rihts reserved
This boo may not be reproduced or copied in hole or in
part ithout the ritten permission of the publisher
DENSO reserves the rihts to mae chanes ithout
prior notice
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Operation 2
Indicates a possibility that improper handling by the user may
result in death or serious inury.
Indicates a possibility that improper handling by the user may
result in inury andor material loss.
1. FOREWORD
DENSOs RT1 air-conditioning unit is designed for installation on the roof top of fied roof
caravans and motor homes. efore using the unit please take time to read this manual in
detail and follow the instructions on how to operate this product. eep this manual in your
caravan and should you ever decide to sell your caravan please make sure to pass this
manual on to the net owner.
1.1 DEINITION O TERMS
SMOLS MEANINGS
WARNING
CAUTION

2. INVENTORY
our air-conditioner unit comprises the following items.
1. Eternal Roof Top unit
2. Air Distribution Unit
Remote Control Unit
including a wall bracket
and batteries
3.
NOTE: Images not to scale
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Operation 3
The ability of the air-conditioner to maintain a desired temperature depends
upon the heat entering or leaving your vehicle. The following simple guidelines
should be followed to achieve the best comfort lowest energy use and quietest
operating noise.
a. Park your vehicle in a shaded area.
b. eep all windows doors curtain and blinds closed while operating.
c. Select higher fan speeds for higher cooling performance.
d. Switch your air-conditioner to cooling early in the day before the interior
of the vehicle has become too hot.
e. If the interior of the vehicle is already hotter than the outside air briefly
open doors and windows to ehaust the hot air before starting the
air-conditioner cooling.
f. Avoid using stoves and ovens that add heat to the vehicles interior
while the air-conditioner is cooling.
3. GENERAL INFORMATION
3.1
In humid conditions the operation of an air-conditioner can cause the formation of
condensate on cold surfaces inside your vehicle. Care must be taken to prevent
this condensate from damaging personal items or causing a build up of mould.
Items that may be damaged by the condensate must be kept clear of the air
distribution unit. In rare circumstances condensate can form on this unit during
use. Should there be formation of condensate allow it to dry thoroughly after use.
3.2
NOTE: Condensation can be reduced by keeping all doors and windows closed during
air-conditioner operation, preventing humid air from entering the vehicle. The likelihood of
condensation on the air distribution unit can be reduced by ensuring that the caravan is properly
sealed, preventing entry of moisture laden air.
WARNING
All electrical work and permanent wiring must be carried out by an appropriately
qualified person in accordance with national wiring regulations and all other applicable
local codes and regulatory authority requirements.
Repair to electrical components by non-certified technicians may result in death
personal inury andor damage to the unit. All electrical components replaced must be
genuine replacement parts purchased from an authorised reseller.

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Operation 4
WARNING
This appliance is not intended for use by persons including children with reduced
physical sensory or mental capabilities or lack of eperience or knowledge unless
they are supervised and given instructions concerning the use of the appliance by a
person responsible for their safety.
Children must be supervised at all times to ensure that they do not play with this
appliance.
Prior to operation familiarise yourself with the location of the safety circuit breaker
and isolation switch for the air-conditioner on your caravan. In the event of a fault
or damage switch off the power supply and contact an approved service agent for
assistance.
a. Only a licenced electrician may replace the unit fuse. The fuse is
located in the electrical control housing inside the roof top unit. use
rating is 20V00VAC 10A T-Delay 20mm supplied by DENSO.
b. The safety circuit breaker must be switched to off position to
disconnect it from the power supply before any disassembly or repairs.
c. The air-conditioner uses the refrigerant R10a under high pressure. It
is both dangerous and illegal to tamper with the sealed refrigerant
system without appropriate licensing. Intentional release of refrigerant
is illegal in Australia and New ealand.
The air intake ehaust and condensate drain on the sides of the eternal unit
must be kept clear of any material that may block airflow or water drainage.
ailure to keep these areas clear could cause poor performance water leakage
into your vehicle and permanent damage to the air-conditioner.
The air-conditioner must never be operated while the vehicle is moving. efore
operating the air-conditioner ensure that the vehicle is parked with the unit tilted
no more than  from the horiontal.
This unit is designed to be operated on 230 - 20V 0 power from the electricity
grid or a sine wave inverter equipped generator. The recommended generator
capacity for this unit is 2. kVA Continous Power. When choosing a generator
please bear in mind that other devices and appliances may add to the demand on
the generator. In this case the generator capacity should be selected accordingly.
3.3
3.

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Operation 5
. CONTROLS
.1 REMOTE CONTROL
A/ Power
OnOff switch
B/ Temperature Decrease
Lowers to the desired room temperature 1-30C
C/ Temperature increase
Raises to the desired room temperature 1-30C
D/ Fan Speed
Cycles the interior fan through 3 speed settings.
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Operation 6
E/ Timer
(i) On Timer
Pressing this button while the unit is off will set the on timer. Each
button press adds 1 hour to the wait time until the unit starts
1-12 hours. After cycling through 12 hours the net button press will
cancel the on timer.
ii Off Timer
Pressing this button while the unit is on will set the off timer. Each
button press adds 1 hour to the wait time until the unit stops
1-12 hours. After cycling through 12 hours the net button press will
cancel the off timer.
F/ Mode
Cycles through the 3 modes of airconditioner operation.
(i) Fan Mode
Used for ventilation only. an speed can be changed between low
medium and high by pressing D- an Speed.
(ii) Cooling Mode
The compressor and eternal fan will operate automatically to cool
the cabin to achieve the desired temperature. an speed can be
adusted between low medium and high by pressing D- an Speed.
iii Heating Mode
The compressor and eternal fan will automatically operate
to heat the cabin to achieve the desired temperature. The interior fan
speed can be adusted between low medium and high by pressing
pressing D - an Speed to achieve an optimum heating performance.
G/ Quick Cool
The air-conditioner will change to maimum cooling mode and
maimum fan speed for a period of 1 minutes during which the uick
Cool Indicator  will illuminate. After 1 minutes or if the quick cool
button G is pressed again the air-conditioner will resume operation
with the previous settings.
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Operation 7
H/ Directional Airow Controls
Vertical airflow directional control.
I/ Power Indicator (Blue)
Illuminates when the air-conditioner is switched on.
J/ Infrared Remote Control Receiver
Electronic receiver for remote control signal.
K/ Quick Cool Mode Indicator (White)
Illuminates while the air-conditioner is operating in quick cool mode.
.2 UNIT
 I   
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Operation 8
. OPERATION
CAUTION
Always ensure that the caravans power supply cord is fully uncoiled before operating
the unit to prevent overheating.
Switch the air-conditioner on by pressing the Power utton A on the remote
control while aiming the control in the direction of the Infrared Remote Control
Receiver  on the ceiling mounted air distribution unit. The air-conditioner will
beep and the Power Indicator I will illuminate to acknowledge the signal.
Set the desired operating mode an Cooling or eating an Speed low Medium
or igh and the desired temperature 1 - 30C. The interior fan eterior fan and
compressor will operate automatically depending upon the settings chosen. an
speed should be selected manually to the lowest level that achieves the desired
room temperature.
.1
.2
.3
The Power indicator I will illuminate briefly when the power supply is connected and
switched on.
Once the desired room temperature is reached the air-conditioner will cycle the
compressor and eterior fan to maintain the temperature level.
If the air-conditioner cannot reach a comfortable temperature in cooling mode increase
the fan speed to increase performance.
The desired temperature can be adusted if you are too hot or cold.
Switch the unit off by pressing the Power button A on the remote control. The
Power Indicator I will etinguish.
Alternatively the unit can be set to switch off automatically using the Off Timer. While
the unit is switched on press the Timer button E on the remote control repeatedly until
the display shows the desired number of hours until the airconditioner will switch off.
NOTE: Whenever the remote control is used, it must be aimed in the direction of the Infrared
Remote Receiver (J) on the Air Distribution Unit from a distance of less than 8m. The air
distribution unit will beep once and the Power Indicator (I) will ash once to acknowledge the
command.
Ensure that the caravan is connected to a clean 230 - 20V power supply. If connected
to a generator it must be of the sine-wave type and adequately rated.

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Operation 9
The compressor and eterior fan speed are microprocessor controlled to automatically
ensure a long life for your air-conditioner while maintaining the best possible comfort.
Depending upon the conditions and air-conditioner settings you may notice some of
the following:
a. Automatic Compressor Start Protection: The compressor start may be
delayed for up to 3 minutes after selecting cooling or heating mode.
b. Exterior Fan Speed: The eterior fan may switch between high and low
speeds to minimie the operating noise of the airconditioner for you and your
neighbours.
c. Cooling Operating Range: The compressor may not operate in cooling
mode if the outside temperature is greater than C in order to protect the
refrigerant system.
d. Heating Operating Range: The airconditioner is designed to operate in
heating mode when the outside temperature is between 0-2C. If the
temperature is outside this range the compressor may not operate in order to
protect the refrigerant system.
e. Preheat: The interior fan will not switch on in heating mode until the air-
conditioner has warmed up sufficiently to deliver comfortably warm air. At
very low temperatures this could take up to 10 minutes from the start of the
compressor and eterior fan.
f. De-icing: The air-conditioner operates as a heat pump when in heating mode.
eat is drawn from the outside air to warm the vehicle. As the outside air
temperature drops less heat is available to the air-conditioner and a
decrease in the heating performance may be noticed. When the outside
temperature is very low below C ice may form on the condenser in the
air-conditioner. The microprocessor control has a fully automatic protection
function that will remove the ice when required. Depending upon the
conditions you may notice the compressor interior and eterior fans switching
off as often as every 1 minutes to protect your air-conditioner and provide
maimum comfort.
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Operation 10
. MAINTENANCE
WARNING
Always ensure that the air-conditioner is isolated from the mains power supply by
switching off the AC switch and safety circuit breaker before performing and during
any maintenance.
.1 INLET AIR ILTER
Two dust filters are fitted to the return air inlet of the air-conditioner. These filters are
essential to prevent a build up of dust blocking the evaporator. The filters Part No.
TA120-2230 must be cleaned at least twice per year by washing in warm water with
a mild household detergent. Allow the filters to dry before re-installing. Replacement
filters are available for purchase as spare parts should the original be damaged.
lip down the two tabs on the sides
of the filter as shown in the image.
lip down the centre tab and use it to
pull the air filter approimately
20 - 30 mms out of the unit.
Once the outer tabs are eposed
use them to gently pull the filter out
of the unit.
After cleaning the filters carefully
insert them back into the slots which
are provided. Once the filter is fully
in place press down the three tabs
to lock it in.
Repeat steps a b and c above for
the second filter on the other side of
the unit.
a.
b.
c.
d.
CAUTION
ailure to clean the filter will result in decreased air-conditioner performance increased
noise and possible overheating and damage to the air-conditioner. The air-conditioner
should never be operated without the filters installed.


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