PACKAGED TERMINAL A/C

Service Manual

Heat Controller

 

 

 

Controller Functions and Operating Methods

The relationship between Centigrade and Fahrenheit is: Tcentigrade=Tfahrenheit*1.8+3.2

A. Temperature Parameter

nIndoor setting temperature (Tpeset)

nIndoor ambient temperature (Tamb)

B.System Basic Function

The compressor has a 3 minute time delay before it will start as a protective feature. Once the compressor begins to run, the compressor cannot be stopped by changing the set temperature. However, it can be stopped by changing the mode the unit is operating in or by turning the unit off. Once the unit is restarted, the compressor will not restart until the 3 minute time delay has surpassed. (The compressor can be stopped immediately at the time of mode switchover, turning off the unit, adjusting set- ting temperature and when in protective modes.)

1. Cooling Mode

When Tamb ≥Tpreset+2°F (1°C), the unit runs in cooling mode. Meanwhile, the compressor runs and the fan runs at the preset fan speed.

When Tamb≤Tpreset-2°F (1°), the unit will turn OFF, the compressor will stop, however the fan will continue to run at the preset fan speed;

When Tpreset-2°F (1°C)<Tamb<Tpreset+2°F (1°C), the unit keeps running with the previous settings. n In this mode, the unit’s display will read the set temperature and the cooling LED is illuminated.

2. Fan Mode

In this mode, only the fan runs. The compressor won’t run and the temperature can’t be adjusted. The fan speed can be changed. The display will read ambient temperature (32~99°F, when ambient temperature is higher than 99°F, it will display H1; when ambient temperature is lower than 32°F, it will display L0), and the fan LED is illuminated.

3. Energy Saving Mode

When Tamb≥Tpreset+2°F (1°C), the unit runs in cooling mode. Meanwhile, the compressor runs and the fan runs at the preset fan speed.

When Tamb≤Tpreset-2°F (1°C), the compressor will turn off while the fan will continue to run for 3 minutes; If Tamb≤Tpreset- 2°F (1°C), the fan will stop for 10 mins, and then turn on for 2 minutes at the preset speed. It will continue to cycle the fan on and off in this sequence until Tamb≥Tpreset+2°F (1°C), then the fan and the compressor will start up (the start-up of compres- sor will be delayed for 3 minutes; the fan start up will occur 30 seconds prior to the compressor).

4. Heating Mode

When Tamb≤Tpresent-2°F (1°C), the unit is runs in heating mode. Meanwhile, the electric heater will start after the fan runs for 3 seconds. When Tamb≥Tpresent+2°F (1°C), the electric heater will turn off and the fan will continue to run til Tair exhaust≤90°F and the unit stops (the fan will run 15 seconds after the unit stops); Then the fan will stop for 10 minutes and run for 1 minute at low fan speed. It will continue to cycle the fan on and off in this sequence until Tamb≤Tpreset-2°F (1°C).

5. OFF mode

If the OFF mode is selected the power button is active on the control panel. The freeze protection feature remains enabled, even when the unit is OFF.

If the UP or DOWN buttons are pressed the display will turn off, after the ambient temperature is displayed for 15 seconds. The indoor light will also turn off after 15 seconds.

6. Freeze Protection

This feature works in OFF, cooling and fan modes.

If the indoor ambient temperature is lower than 40°F (5°C) for 5 seconds, the electric heat mode and the freeze protection mode will start up.

When the indoor ambient temperature is more than 50°F (10°C), the freeze protection mode will turn off.

After entering into the freeze protection mode, it can’t be stopped by pressing any buttons. During freeze protection mode, the display reads “FP” and the green running LED is illuminated. During the freeze protection mode, the unit can’t be controlled by the wall thermostat.

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Heat Controller EKTC09-1G, EKTH15-1G, EKTH12-1G, EKTH09-1G Controller Functions and Operating Methods, System Basic Function
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EKTH09-2G, EKTH09-1G, EKTH07-2G, EKTH15-1G, EKTC07-2G specifications

The Heat Controller EKTC15-2G, EKTC09-2G, EKTC12-2G, EKTH12-1G, and EKTH12-2G models represent a cutting-edge advancement in the realm of heating solutions, designed to deliver efficient and reliable performance. With a commitment to energy efficiency and user comfort, these models cater to diverse heating needs in various residential and commercial environments.

One of the standout features of these models is their advanced heat pump technology. This technology allows the units to extract ambient heat from the air, even in chilly conditions, maximizing efficiency and minimizing energy consumption. The EKTC and EKTH series offer rapid heating performance, ensuring that spaces are warmed swiftly and effectively.

Each model is equipped with intelligent control systems that allow users to set specific temperature preferences. The digital thermostat ensures precise temperature regulation, enhancing comfort while optimizing energy use. Additionally, the user-friendly interfaces are designed for ease of operation, enabling quick adjustments to heating settings.

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Safety features are also paramount in the design of these heating units. Overheat protection and automatic shutoff mechanisms provide peace of mind, preventing any potential hazards.

In closing, the Heat Controller EKTC15-2G, EKTC09-2G, EKTC12-2G, EKTH12-1G, and EKTH12-2G models stand out for their superior performance, energy efficiency, and user-centric features. They are designed to meet the needs of modern heating requirements, providing warmth and comfort while keeping energy consumption in check. Whether for residential use or commercial application, these heating solutions embody the perfect blend of innovation and practicality.
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