Troubleshooting Guide

Pumping Down

Indoor unit

Liquid side

 

Open

Outdoor unit

2-Way valve

Gas side

Closed

3-Way valve

Lo

CLOSECLOSE

Purge the air

• Procedure

(1)Confirm that both the 2-way and 3-way valves are set to the open position.

Remove the valve stem caps and confirm that the valve stems are in the raised posi- tion.

Be sure to use a hexagonal wrench to operate the valve stems.

(2)Operate the unit for 10 to 15 minutes.

(3)Stop operation and wait for 3 minutes, then connect the charge set to the service port of the 3-way valve.

Connect the charge hose with the push pin to the service port.

(4)Air purging of the charge hose.

Open the low-pressure valve on the charge set slightly to air purge from the charge hose.

(5)Set the 2-way valve to the closed position.

(6)Operate the air conditioner at the cooling cycle and stop it when the gauge indi- cates 1kg/cm2g.

(7)Immediately set the 3-way valve to the closed position.

Do this quickly so that the gauge ends up indicating 3 to 5kg/cm2g.

(8)Disconnect the charge set, and mount the 2-way and 3-way valve’s stem nuts and the service port nut.

Use torque wrench to tighten the service port nut to a torque of 1.8 kg.m.

Be sure to check for gas leakage.

Do not use the existing charge set for R-22. It is necessary to use new charge set for R- 410A. The pressure of R-410A is 1.6 times higher than that of R-22. Thus, the high pres- sure side gauge of charge set should be used higher pressure gauge of 50kg/cm2 range.

Service Manual 45

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Image 45
Heat Controller DMC24SB-1, DMC18SB-1, DMC12SB-0, DMC09SB-0, DMH09SB-0 Pumping Down, Procedure, Air purging of the charge hose

DMH12SB-0, DMH18SB-1, DMC24SB-1, DMH24SB-1, DMH09SB-0 specifications

The Heat Controller DMC24SB-1, DMH18SB-1, DMH09SB-0, DMH24SB-1, and DMC18SB-1 are a series of high-efficiency air conditioning systems designed to meet diverse climate control needs. Each model is equipped with advanced technologies to ensure optimal performance, energy efficiency, and user comfort.

One of the standout features across this range is the incorporation of inverter technology. This technology allows the units to adjust the compressor speed based on the desired temperature, significantly reducing energy consumption compared to traditional systems. As a result, users can enjoy lower utility bills while maintaining a consistent indoor climate.

The DMC24SB-1 is particularly notable for its robust cooling capacity, making it ideal for larger spaces. It boasts a sleek design that complements modern interiors while providing efficient air distribution through its multi-directional airflow system. The unit is also equipped with a programmable timer and remote control for added convenience.

The DMH series, including the DMH18SB-1, DMH09SB-0, and DMH24SB-1, offers versatility in terms of size and cooling capacity. The DMH09SB-0 is perfect for smaller rooms, while the DMH24SB-1 can effectively cool larger areas. Each model in the series features a quiet operation mode, ensuring minimal noise when cooling or heating.

The DMC18SB-1 stands out for its dual functionality, providing both heating and cooling options. This model is equipped with an advanced Eco-friendly refrigerant that not only reduces environmental impact but also enhances overall system efficiency. Additionally, it features self-cleaning technology that eliminates dust and allergens, improving indoor air quality.

All models are designed with user-friendliness in mind, featuring clear digital displays and easy-to-navigate controls. Moreover, these heat controllers adhere to the highest energy efficiency ratings, ensuring they meet stringent environmental guidelines.

In summary, the Heat Controller line featuring models DMC24SB-1, DMH18SB-1, DMH09SB-0, DMH24SB-1, and DMC18SB-1 exemplifies cutting-edge heating and cooling solutions. With their advanced technologies, energy-efficient performance, and user-centric designs, these units are well-suited for both residential and commercial applications, offering reliable comfort year-round.