Tractor Roof DC 24V Air Conditioner DR2

1. What's parking air conditioner?

 

Parking air conditioning (also known as parking cooler/ electric cabinet air conditioner) refers to battery powered air conditioner, consuming electricity from the vehicle battery (DC 12V/24V/36V/48V/60V/72V) instead of taking power from engine. It’s normally used in vehicle parking to control the temperature, humidity, flow rate to create a comfortable environment for drivers.

 

Parking air conditioner is widely used for trucks, construction machinery, campers, motorhomes, and other confined spaces. Compared with traditional vehicle air conditioners, parking air conditioners do not need to rely on vehicle engine power, which can save fuel and reduce environmental pollution.

 

Parking air conditioners are mainly for single-cooling, constituted of condenser, evaporator, electronic control system, compressor, fan and piping and others parts. For rooftop air conditioners, refrigerant HFC134a/R410A is prefilled in the air conditioning system. For split parking air conditioners, prefilled and un-prefilled types are for option.

 

Parking air conditioners are divided into rooftop air conditioners, split/backpacks air conditioners, and hidden and parallel air conditioning systems. While rooftop air conditioners require cutting the ceiling, for customers who cannot accept this situation, clients prefer split air conditioners.

 

To avoid vehicle not starting due to low battery power, all parking air conditioners are equipped with low-voltage/high-voltage protection, current overload protection and other protection functions. If there is any problem with the air conditioning system, the corresponding error code will show on the screen. According to the error code, the error code explanation and solution will be provided in the manual, which makes air conditioner repairment easier. The error code definitions for each model are different, so clients need to refer to different instructions.

 

2. Specifications for Tractor Roof DC 24V Air Conditioner DR2

 

Tractor Roof DC 24V Air Conditioner DR2 was designed for high end market, launched in 2021. It's with double rotor compressor, double size copper condenser and copper evaporator, 2 brushless condenser fans motors and brushless evaporator fan motor and LED lights. It's supper silent (30-40dB) and stable, saving 15%-20% energy compared with scroll compressor.

With double rotor compressor, Tractor Roof DC 24V Air Conditioner DR2 provides much stronger cooling performance, saving more power while offering more cold air. The operation is stable, less shaking and less noise, because of its reasonable structure. Meanwhile we adopt top quality parts for this AC system, including brush-less fan motors and blower motors for much longer service life, double fans for more amount of circulation air, pure copper condenser and evaporator for faster heat exchange between cabin interior space and outside. 

 

Tractor Roof DC 24V Air Conditioner
SNA-DR2
Rated Voltage	24V only
Current	15-45A
Rated Power	400-800W
Rated Cooling Capacity	9000-10500BTU/2600-3000W
Description	Double fans, copper evaporator & condenser, double rotory compressor, brushless fan motors and blower motor, automatic swing outlets, LED light
Performance Co-efficient	≥2.5
Air flow	480-700 mc/h
Refrigerant	R134a
Refrigerant Oil	POE68
Charging Quantity of Refrigerant	600±30g
Temperature setting	15-30℃
Outdoor/ Indoor size	110*950*175mm / 490*370mm
Color	White, yellow, red and customized
Package	113*85*42cm; 44.5KG
OEM	Support

 

3. Notes for using parking air conditioners

In using parking air conditioner, please follow the instructions as below:

 

To set the air-conditioning temperature within a suitable range. Low temperature not only easily causes physical discomfort, but also increases energy consumption.

 

To choose proper operation mode: Parking air conditioners are with eco mode, sleep mode and strong mode. Clients can choose the appropriate mode according to their needs.

 

* Under voltage protection, if the power supply voltage is lower than the set value (default: 21.5V), the red light will light up when the battery is low. In the under voltage state, the internal fan will stop outputting, and the analog voltage output of the frequency modulation line will stop. The external unit will enter standby mode and stop working. When the voltage exceeds the under voltage recovery value (default: 25V) again, the system will restart and resume operation.

* Overvoltage protection: When the power supply voltage is higher than 30V and the battery level is high, the red light will be on. In the overvoltage state, the internal fan will stop outputting, and the analog voltage output of the frequency modulation line will stop. The external unit will enter standby mode and stop working. When the voltage drops below the overvoltage recovery value (default 28V), the system will restart and resume operation. When the panel detects a fault, it stops working, the fault icon flashes, and a fault code is displayed on the digital display.

 

EC: Temperature control sensor malfunction. Check the temperature probe connector or replace the temperature probe on the panel.

EF: Internal fan malfunction, fan short circuit or overcurrent. Check if there is a short circuit or carbon brush problem with the indoor fan.

E1: Under voltage/Over voltage. Check the power supply circuit and undervoltage settings.

E2: Controller overcurrent protection. Check the heat dissipation of the external unit, whether there is a heat source at the installation position, and whether there is excessive refrigerant filling. E3: Controller blocking protection. Poor contact of the compressor connection line, or compressor jamming.

E4: Controller undervoltage protection. Check the power supply circuit of the controller and ensure undervoltage protection.

E5: Short circuit protection or controller damage. Check for wear and short circuits in the connecting wires between the controller and the compressor. E6: Controller overvoltage protection. Check if the system voltage exceeds 30V.

E7: Three consecutive startup failures, usually caused by E3 or E12.

E8: Outdoor fan failure. Check the connection wires of the fan.

E9: The temperature switch or pressure switch is disconnected. Check the system pressure or temperature switch.

H2: Controller phase loss protection. Check the compressor connection line.

H3: Controller power device over temperature protection.

H4: Controller malfunction.

 

4. Installation Instructions

 

* Remove the cab’s sunroof

* Clean dust of the joint part of the skylight

* Paste double-sided sponge and apply waterproof adhesive inside and outside the sponge

* Install the top mounted all-in-one air conditioner onto the top of the cab and handle it carefully, aligning the inner air outlet with the sponge frame

* Fix the air conditioner: use four screws to adjust and fix the inner bracket

* Take out the interior panel and install it with the screws to fix it, then fix the nuts

* Connect the power cables, with red connected to the positive of the battery and black connected to the negative of the battery directly (reversing the connection will burn out the controller)

 

Operating instructions:

* Short press the power switch to turn on the panel;

* Press [Temperature+] to increase the set temperature value, press [Temperature -] to decrease the set temperature value

* Press the [Wind Speed] button to adjust the wind speed, cycle through 1st to 5th gear (the remote control adds automatic wind speed mode after 5th gear)

* Panel view of new body temperature, inlet air temperature, power voltage, and speed regulation voltage method: Press and hold the wind speed button for more than 6 seconds, when the wind speed indicator starts to flash, press the temperature [+] [-] to check the above status separately, and press the wind speed button again to exit;

* Check the power supply voltage and speed regulation voltage on the remote control, and select the undervoltage protection value. Method: Press the mute button on the remote control when turned on, check the power supply voltage and speed regulation voltage separately, and press the mute button again to set the undervoltage protection value.

 

5. What will affect parking air conditioner refrigeration efficiency?

 

* After installation, it is necessary to measure the high and low pressures. The high pressure should be controlled at around 12kg (when the ambient temperature is around 36 ℃), and it is best to control it below 12kg when testing indoors or at night. Otherwise, the pressure will rise very high at high temperatures, which can cause the refrigerant temperature to be too high and affect the cooling effect.

* It is necessary to use genuine R134a refrigerant and legitimate products from national standard brands.

* Use genuine R134a hose, otherwise it may cause the refrigerant and refrigeration oil to deteriorate.

* The wiring should be thick. Within 2 meters, 3.58mm power cables can be used from the battery to the compressor, 3.47mm power cables should be used for 2-5 meters, and 4.51mm power cables should be used for more than 5 meters. (Note: Due to the high current of the electric compressor, a thin wire may cause excessive line loss. Please connect according to the wiring diagram requirements)

* Try to fully charge the battery as much as possible before use, as low battery operation can reduce the compressor speed and affect the cooling effect.

* The condenser should be cleaned regularly, at least once a week, and the construction vehicle should be handed over for cleaning every day, otherwise it will seriously affect the refrigeration effect.

* When using an electric air conditioner while driving, the battery should be fully charged first, and the generator must be above the standard 75A. Vehicles with less than 75A must pay attention to the battery storage on the dashboard during the driving process. Once a low battery occurs. The power indicator should immediately stop using the electric air conditioner. Especially when driving at night, be careful as the generator is running while driving. When the voltage is high, the compressor controller may mistakenly assume that the battery is fully charged, but in reality, the battery is no longer charged. When parking, the compressor controller is automatically controlled, which will not cause battery loss. Additionally, the generator is smaller than 55A, there will still be undervoltage and the air conditioning will stop and turn on. (This is because the battery has run out of battery power, and when the generator. When the motor speed is low, the power cannot keep up, resulting in undervoltage

* To maximize the efficiency of electric air conditioning, it is recommended to install a set of 200A or above power batteries or a generator with 80A or above. It can be used for about 5 hours when the temperature is high during the day and for more than 10 hours at night. Using electric air conditioning while driving also has no impact.

* The positive and negative poles of the electric air conditioner must be connected to the positive and negative poles of the battery, otherwise there will be a significant voltage drop, which will cause the electric air conditioner to shut down due to undervoltage.

* The green line of the controller cannot be directly connected to the test light for measurement, and a multimeter must be used for measurement.

* The installation of batteries requires the use of power batteries (such as traction batteries for electric tricycles).

 

6. How to maintain parking air conditioner?

 

Before cleaning it, make sure the air conditioner is turned off, powered off and unplugged.

 

* To clean indoor unit evaporator surface:

Wash the cleaning cloth in clean water, dry it and wipe the surface of the unit. The cloth can be dipped in the water solution of neutral cleaner.

 

* To clean the core of evaporation tank:

Remove the indoor unit case and blow off the dust on the surface with compressed air.

 

* To clean outdoor unit:

Remove the unit case and clean the condenser with compressed air. Avoid any bump against the condenser.

If you don’t use the parking air conditioner for a long time, unplug the air conditioner and wrap the outdoor unit and avoid any bump

 

* To use the parking air conditioner after long-time storage:

Clean the unit body, condenser, and evaporation unit; check if there is foreign matter at the air inlet/outlet of the indoor and outdoor unit; check if the drain pipe is clear; put batteries in the remote control; make inspection and power it on.

 

Tips:

Clean the air conditioner once every month. If there is too much dust in the working environment, increase the cleaning frequency accordingly. Please make regular cleaning to make sure it can run normally.

 

7. RFQ

 

● How many hours will the parking air conditioner work?

For scroll compressor type, sleep mode power consumption is 600W, strong mode power consumption is 800-1000W. For rotor compressor, sleep mode power consumption is 400W, strong mode power consumption is 700-800W. For example, 24V 400Ah battery, scroll compressor parking air conditioner will last 10-12 hours, and rotor compressor parking air conditioner will last 14-16 hours.

 

● Do I need to buy other parts after I receive the parking air conditioner?

It’s a whole package with all parts needed. For rooftop parking air conditioners, Freon is prefilled, so all you need to do is install and connect it to battery. For split air conditioners without Freon, all you need to do is ask a mechanic to install and fill Freon at suggested amount.

 

● Can I become your agent on certain market?

For exclusive agents on certain market, we have minimum order requirement for all year and down payment for the whole year orders. If order quantity is over certain quantity, we will customize your own model. Please contact our salesmen for more details.

 

● What color do you have for parking air conditioners?

Normally we only make red and white covers for parking air conditioners. If you need other colors, we have minimum order quantity for it.

 

● Can I test the samples before placing big orders?

Sure. Clients can several samples to test and compare first. We attend exhibitions all over the world and you can contact our salesmen to check if we plan to attend the exhibition in your country recently. It’s better to talk the products face to face.