Troubleshooting procedure Continued

Frequently asked questions

Q:The system has just been installed us- ing an EMI indoor unit and a non-EMI condenser. There is no display and the unit will not operate.

A:EMI air handlers are manufactured with a low volt transformer installed. When connecting an EMI evaporator to a non- EMI condenser, check to ensure that there is no 24v control transformer in the outdoor unit. Only one transformer is required. If both the indoor unit and outdoor unit contain a transformer, one must be removed from the system.

Q:The condenser will not start although the indoor unit appears normal. What should I do?

A:At the indoor unit, make sure that the control is in cooling and the setpoint temperature is below room temperature. Next, using a volt meter, check for 24v across the yellow (Y) and brown (C) wires. If 24v is present then check for wiring breaks or improper connections between the indoor and outdoor units.

A:Some EMI condensers are equipped with a manual reset high-pressure switch. It is located on the high side of the refrigerant system usually on the discharge line of the compressor. To reset, simply push the red button in. If the switch was tripped there will be a “click” when it resets.

A:If the unit is equipped with a condensate pump check to see if the safety float has been tripped. This can be done by first disconnecting both ends of the float switch. Then with an Ohmmeter, check for continuity across the switch. If the switch is open then the pump is not clearing or the switch may be bad.

Q:The display on the indoor unit is blank.

What should I do?

A:Check the power supply (see “Power supply check” Section). If the unit still fails to turn on via the On/off button then inspect the control box for any apparent wires that may have come loose during shipping. Also inspect the circuit boards for burnt components. If no obvious problem can be found then replace all circuit boards including the unit keypad. Do not attempt to trouble shoot the individual circuit boards.

Q:The display tends to flicker at times. Is this normal?

A:A small amount of flickering of the dis- play is normal. Depending on the room lighting, flickering may be noticeable at some times more than others.

Q:How long will the fan run?

A:While the unit is in cooling or heating and auto fan mode is selected, Fan speed will be determined by the micro- processor and speed adjustment will be made according to room and setpoint temperatures. The fan will switch to High speed when room temperature deviates by more than two degrees from setpoint. The fan will switch to Low speed if the deviation is one degree. When the room temperature reaches setpoint temperature the heat/cool call is dropped. The fan will then stay on for an additional 60 seconds to purge unit of any residual energy. If High or Low is selected then the fan will operate continuous regardless of set point or room temperatures.

Q:What causes my indoor unit to freeze-up?

A:Evaporator freeze up is usually the symptom of another problem. Units with infrared compatible, unit mounted con- trols are equipped with freeze protection

WLCA/WLHA High Wall Evaporator

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EMI S1C, WLHA manual Frequently asked questions, Display on the indoor unit is blank What should I do?

WLHA, S1C specifications

The EMI S1C, also known as the WLHA, is a cutting-edge electronic device renowned for its advanced features and robust technologies. This innovative equipment caters to a wide range of applications, from multimedia processing to advanced communications. Its design showcases a seamless blend of functionality and performance, making it a preferred choice among professionals in various fields.

One of the standout characteristics of the EMI S1C is its high-performance processing capability. Equipped with a powerful multi-core processor, the device ensures rapid data processing and multitasking without compromising efficiency. This feature is particularly beneficial for applications requiring real-time data analysis and complex computational tasks.

The WLHA further distinguishes itself through its exceptional connectivity options. It supports multiple input and output standards, including USB, HDMI, and Ethernet, facilitating seamless integration with other devices. This flexibility allows users to connect a variety of peripherals and streamline workflows, enhancing overall productivity.

In terms of user experience, the EMI S1C places a strong emphasis on intuitive interaction. It features a user-friendly interface that simplifies navigation and accessibility. The touchscreen display provides responsive feedback, enabling users to operate the device effortlessly, even in high-pressure scenarios.

Another prominent aspect of the EMI S1C is its advanced power management system. The device is designed to optimize energy consumption without sacrificing performance. This sustainability feature is not only environmentally friendly but also crucial for mobile applications, where battery life is a significant consideration.

Furthermore, the WLHA's robust build quality ensures durability and resilience in diverse environments. The device is constructed with high-grade materials that withstand wear and tear, making it ideal for use in industrial settings or field operations where ruggedness is essential.

Security is also at the forefront of the EMI S1C's design. The device incorporates advanced encryption technologies and secure boot mechanisms to protect sensitive data from unauthorized access. This commitment to security is particularly relevant in today's digital landscape, where data breaches and cyber threats are prevalent.

In summary, the EMI S1C, WLHA is a versatile and powerful electronic device that excels in various domains. Its combination of high-performance processing, extensive connectivity, user-friendly interface, energy efficiency, durability, and robust security features makes it a top choice for professionals seeking reliability and innovation in their tools. Whether in multimedia, telecommunications, or industrial applications, the WLHA is poised to meet the demands of modern technology users effectively.