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- Page 1 RT1 AIR CONDITIONING UNIT OWNERS MANUAL Published: October 2012 REV #1: May 2013 DENSO AUTOMOTIVE SYSTEMS AUSTRALIA PTY. LTD. 2-46 Merrindale Drive Croydon Victoria 3136 DENSO AUTOMOTIVE SYSTEMS AUSTRALIA PTY LTD tel: 03 8761 1449 email: service.department@denso.com.au AL00Z00004E...
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Page 2: Table Of Contents
DENSO AUTOMOTIVE SYSTEMS AUSTRALIA PTY. LTD. May 2013 All rights reserved. This book may not be reproduced or copied, in whole or in part, without the written permission of the publisher. DENSO reserves the rights to make changes without prior notice. -
Page 3: Foreword
Operation 1. FOREWORD DENSO’s RT1 air-conditioning unit is designed for installation on the roof top of fixed roof caravans and motor homes. Before using the unit, please take time to read this manual in detail, and follow the instructions on how to operate this product. Keep this manual in your caravan, and should you ever decide to sell your caravan, please make sure to pass this manual on to the next owner. 1.1 DEFINITION OF TERMS SYMBOLS MEANINGS WARNING Indicates a possibility that “improper handling by the user may result in death or serious injury”. Indicates a possibility that “improper handling by the user, may CAUTION result in injury and/or material loss”. 2. INVENTORY Your air-conditioner unit comprises the following items. 1. External Roof Top unit Remote Control Unit including a wall bracket and batteries 2. Air Distribution Unit NOTE: Images not to scale... -
Page 4: General Information
Operation 3. GENERAL INFORMATION 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. Park your vehicle in a shaded area. Keep all windows, doors, curtain and blinds closed while operating. Select higher fan speeds for higher cooling performance. Switch your air-conditioner to cooling early in the day, before the interior of the vehicle has become too hot. If the interior of the vehicle is already hotter than the outside air, briefly open doors and windows to exhaust the hot air before starting the air-conditioner cooling. Avoid using stoves and ovens that add heat to the vehicle’s interior while the air-conditioner is cooling. 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. - Page 5 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. Only a licenced electrician may replace the unit fuse. The fuse is located in the electrical control housing inside the roof top unit. Fuse rating is 250V/500VAC, 10A, T-Delay, 5x20mm supplied by DENSO. The safety circuit breaker must be switched to ‘off’ position to disconnect it from the power supply before any disassembly or repairs. The air-conditioner uses the refrigerant R410a 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 Zealand.
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Page 6: Controls
Operation 4. CONTROLS 4.1 REMOTE CONTROL Power On/Off switch Temperature Decrease Lowers to the desired room temperature (16-30˚C) Temperature increase Raises to the desired room temperature (16-30˚C) Fan Speed Cycles the interior fan through 3 speed settings. - Page 7 Operation 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 next 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 next button press will cancel the ‘off’ timer. Mode Cycles through the 3 modes of airconditioner operation. (i) Fan Mode Used for ventilation only. Fan speed can be changed between low, medium and high by pressing D- Fan Speed. (ii) Cooling Mode The compressor and external fan will operate automatically to cool the cabin to achieve the desired temperature. Fan speed can be adjusted between low, medium and high by pressing D- Fan Speed. (iii) Heating Mode The compressor and external fan will automatically operate to heat the cabin to achieve the desired temperature. The interior fan speed can be adjusted between low, medium and high by pressing pressing D - Fan Speed to achieve an optimum heating performance. Quick Cool The air-conditioner will change to maximum cooling mode and maximum fan speed for a period of 15 minutes during which the Quick Cool Indicator K will illuminate. After 15 minutes (or if the quick cool button G is pressed again) the air-conditioner will resume operation with the previous settings.
- Page 8 Operation 4.2 UNIT H I J K H Directional Airflow Controls Vertical airflow directional control. Power Indicator (Blue) Illuminates when the air-conditioner is switched on. Infrared Remote Control Receiver Electronic receiver for remote control signal. Quick Cool Mode Indicator (White) Illuminates while the air-conditioner is operating in quick cool mode.
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Page 9: Operation
Operation OPERATION Ensure that the caravan is connected to a clean 230 - 240V power supply. If connected to a generator, it must be of the sine-wave type, and adequately rated. CAUTION Always ensure that the caravan’s power supply cord is fully uncoiled before operating the unit to prevent overheating. The Power indicator (I) will illuminate briefly when the power supply is connected and switched on. Switch the air-conditioner on by pressing the Power Button (A) on the remote control while aiming the control in the direction of the Infrared Remote Control Receiver (J) 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 (Fan, Cooling or Heating), Fan Speed (low, Medium or High) and the desired temperature (16 - 30˚C). The interior fan, exterior fan and compressor will operate automatically depending upon the settings chosen. Fan speed should be selected manually to the lowest level that achieves the desired room temperature. Once the desired room temperature is reached, the air-conditioner will cycle the compressor and exterior fan to maintain the temperature level. - Page 10 Operation The compressor and exterior 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: 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 exterior fan may switch between high and low speeds to minimize the operating noise of the airconditioner for you and your neighbours. Cooling Operating Range: The compressor may not operate in cooling mode if the outside temperature is greater than 45°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 0-25°C. If the temperature is outside this range the compressor may not operate in order to protect the refrigerant system. 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 exterior fan. De-icing: The air-conditioner operates as a heat pump when in heating mode. Heat 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 8°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...
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Page 11: Maintenance
Operation 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. 6.1 INLET AIR FILTER 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. TA145520-2230) 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. -
Page 12: Technical Data
Dead batteries may leak and damage the remote if left for long periods. Batteries should be removed from the remote if dead or if the air-conditioner is not to be used for a long period. Damage to the remote control caused by leaking batteries is not included in the terms of the manufacturer’s defect warranty. 6.4 GENERAL CONDITION Regularly inspect the condition of the unit for signs of damage, wear or malfunction. If used correctly, this air-conditioner should give you years of comfortable function. However, if you encounter any problems at any time, please switch power off the unit by switching off the AC switch and the safety circuit breaker on your caravan before getting in touch with your nearest Service Agent for assistance. TECHNICAL DATA Unit: RT1 Air-Conditioner. Part No. TA448006-9260 Application: Fixed roof caravans and motor homes Typical Cooling Capacity: 2.5 kW Typical Heating Capacity: 2.0 kW Dimensions: 1096 x 739 x 207(H) Weight: 39 Kg. Power Supply:... - Page 13 Operation 7.1 WIRING DIAGRAM SUPPLY CONNECTION COMPRESSOR THERMAL SWITCH PRESSURE SWITCH CAPACITOR BROWN PTC STARTER CAPACITOR ORANGE EXTERIOR FAN CAPACITOR BLUE INTERIOR FAN GREEN/YELLOW CAPACITOR TRANSFORMER SOLENOID GREEN/YELLOW BROWN MAIN PCB GREY 10A FUSE BLACK REMOTE PCB REMOTE HARNESS WHITE WHITE USE ONLY SPECIFIED BLUE REPLACMENT FUSES &...
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Page 14: Troubleshooting
Operation TROUBLESHOOTING Symptom Cause Remedy Unit does not Power supply is off Check and confirm that the caravan main operate power is switched on. Check the AC switch and the safety circuit breaker on the caravan. All these should be switched on. Power interruption To protect itself from damage, the unit may switch off (return to standby) if power is momentarily interrupted. Ensure that the caravan is connected to a clean power supply within the specified power operating range before attempting to restart the unit. Remote control not Remote control instructions are confirmed by a working beep and the power LED blinking once. There is a short delay between a command being sent and the unit responding. Ensure that the remote control is pointed towards the air distribution unit from a distance less than 8m. Replace the batteries if necessary. Exterior fan The speed of the The external fan is adjusted based on system changes exterior fan changes and ambient conditions. Where possible, the speed. or switches off exterior fan will switch to low speed for less occasionally disturbance to you and your neighbours. In heating mode, the exterior fan may switch off periodically to allow condensate to drain away Poor Blocked condenser... - Page 15 Operation TROUBLESHOOTING - cont... Symptom Cause Remedy Unit System unable Change temperature setting on remote control operating to reach desired (confirmed by beep & LED blink). Close all continously setpoint. doors, windows and curtains to improve insulation and reduce the load on the system. Both LED’s Both LED’s flash Power supply voltage is out of acceptable flashing. Unit together. range for safe operation of the unit. Ensure that does not the caravan is connected to supply of correct operate. voltage. Both LED’s flash Internal fault detected. Contact service centre alternately. for assistance. Condensate Condensate may Ensure all doors and windows are properly formation form on cold sealed when running the air-conditioner. Keep surfaces when all cupboards and drawers closed. operating in humid conditions.
- Page 16 The benefits provided by DENSO’s Warranty are in addition to any other rights and remedies of a consumer under the Australian Consumer Law and any other law which may apply to the Product.
- Page 17 (b) misuse of the Product including use of the Product for purposes other than its intended purpose, use of the Product contrary to Our instructions and recommendations, and use of the Product after it becomes apparent that it requires service, maintenance or repair; (c) accidental damage including fire, theft and explosion; (d) acts of God and damage or corrosion to the Product caused by environmental conditions including excessive moisture, acid rain, airborne fallout, stones, salt, sand, hail, wind, storms, lightning, floods, infestation by rodents or other vermin; (e) modification of the Product in a manner not authorised by Us; (f) incorporation of parts other than DENSO parts or other parts authorised by Us; (g) normal wear and deterioration, having regard to the operating environment of the Product, including discoloration; (h) routine service or maintenance costs; (i) components warranted by other manufacturers; (j) failure to respond in a timely manner to any malfunction of the Product; (k) non-DENSO product, or any installation, service, maintenance or repair by a person other than an Authorised DENSO Service Repairer or other person approved by Us; or (l) commercial use of the Product. 8. LIMITATION OF LIABILITY UNDER THIS WARRANTY As indicated in clause 4, Your rights under this Warranty are limited to repair or replacement of the Product, or being paid the cost of repairing or replacing the Product. We will not be liable under this Warranty for any consequential loss including, without limitation, the injury or death of any person, damage to any other property, or loss of any income, profit or business. 9. EXCLUSION AND LIMITATION OF ANY OTHER LIABILITIES Except as provided under this Warranty and by law, We give You no warranty, guarantee or similar right in relation to the Product. To the full extent permitted by law, We exclude any warranty, guarantee or similar right provided or implied by law. If any warranty, guarantee or similar right provided or implied by law applies to the Product, to the full extent permitted by law We limit Our liability to You to the repair or replacement of the Product, or the cost of having the Product repaired or replaced. Except as provided by law (including the Australian Consumer Law, if applicable), We will not be liable to You, whether in contract, tort or otherwise, for any loss or damage suffered as a result of You acquiring the Product. 10. DEFINITIONS “Authorised DENSO Service Repairer” means a person or company authorised by Us to provide service for such Products. “Product” means [the RT1 caravan air-conditioner unit] supplied with this Warranty in Australia, and used exclusively in Australia. “Supplier” means the authorised distributor or retailer of the Product who sold You the Product or Us if We sold you the Product. “Warranty Period” means the period of time defined in clause 2. “We” or “Us” or “Our” means DENSO Automotive Systems Australia Pty Ltd ACN 007 110 929. “You” or “Your” means the retail purchaser of the Product from the Supplier or the original end-user of the Product.
- Page 18 Please follow the link, via the QR code to complete on-line registration or log on www.denso.com.au/caravan and look for the “on-line registration forms - Caravan Airconditioning. ” Alternatively, complete the below form and mail it to DENSO. Name: Address: Telephone: Caravan brand:...