The mixture of gas and liquid refrigerant enter the accumulator after leaving the evaporator coil. The accumulator prevents any liquid refrigerant from reaching the compressor. The compressor evacuates the cool refrigerant gas from the accumulator and compresses it to a high pressure and temperature

7.2 Troubleshooting

No dehumidification, neither impeller fan nor compressor run with fan switch and ventilation timer OFF.

1.Unit unplugged or no power to outlet.

2.Humidity control set too high or defective.

3.Loose connection in internal or control wiring.

4.Defective Compressor relay.

5.Defective control transformer.

6.Low pressure Control open.

7.Optional Condensate Pump Safety Switch open.

No dehumidification, compressor does not run but impeller fan runs with fan switch and ventilation timer OFF and humidity control turned to ON.

1.Defective compressor run capacitor.

2.Bad connection in compressor circuit.

3.Defective compressor overload.

4.Defective compressor.

5.Defrost thermostat open.

Impeller fan runs with fan switch and ventilation timer OFF, but compressor cycles on & off.

1.Low ambient temperature and/or humidity causing unit to cycle through defrost mode.

2.Defective compressor overload.

3.Defective compressor.

4.Defrost thermostat defective.

5.Dirty air filter(s) or airflow restricted.

6.Low refrigerant charge, causing defrost control to cycle.

7.Bad connection in compressor circuit. Impeller fan does not run with fan switch in either position.

Impeller fan does not run with ventilation timer activated. Compressor runs briefly but cycles on & off with humidity control turned to ON.

1.Loose connection in impeller fan circuit.

2.Obstruction prevents impeller fan rotation.

3.Defective impeller fan.

4.Defective impeller fan relay.

5.Defective impeller fan capacitor.

Impeller fan runs with fan switch ON. Impeller fan does not run with ventilation timer activated.

1.Defective ventilation timer.

2.Time not correct on ventilation timer.

3.Ventilation timer set to manual & switched OFF.

4.Defective fan switch.

Evaporator coil frosted continuously, low dehumidifying capacity.

1.Defrost thermostat loose or defective.

2.Low refrigerant charge

3.Dirty air filter(s) or airflow restricted.

4.Excessively restrictive ducting connected to unit.

Unit not providing ventilation. Ventilation timer not operating correctly.

1.If timer is not functioning correctly reset timer and reprogram.

2.Check control wire connections (check connections at fresh air damper also).

3.Defective fresh air damper.

4.Defective fan switch.

Unit removes some water, but not as much as expected.

1.Air temperature and/or humidity have dropped.

2.Humidity meter and or thermometer used are out of calibration.

3.Unit has entered defrost cycle.

4.Air filter dirty.

5.Defective defrost thermostat.

6.Low refrigerant charge.

7.Air leak such as loose cover or ducting leaks.

8.Defective compressor.

9.Restrictive ducting.

10.Optional Condensate Pump Safety Switch open.

Unit Test to determine problem:

1.Detach field control wiring connections from main unit.

2.Connect the yellow and green pigtails from the main unit together; only the impeller fan should run. Disconnect the wires.

3.Connect the yellow and blue pigtails from the main unit together; the compressor and impeller fan should run.

4.If these tests work, the main unit is working properly. You should check the control panel and field control wiring for problems next.

5.Remove the control panel from the mounting box and detach it from the field installed control wiring. Connect the blue, yellow, and green wires from the control panel directly to the corresponding colored pig- tails on the main unit. Leave the violet, white and red wires disconnected!

6.Turn on the fan switch; the impeller fan should run. Turn off the fan switch.

7.Turn on the humidity control; the compressor and impeller fan should run.

8.If these tests work, the problem is most likely in the field control wiring.

8

Ultra-Aire 135H Air Purifying Dehumidifier Owners Manual

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Therma-Stor Products Group 135H owner manual Troubleshooting
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135H specifications

Therma-Stor Products Group has introduced the innovative 135H, a high-performance dehumidifier designed to meet the needs of various applications, including residential and commercial spaces. The 135H stands out for its advanced technology and several features that improve efficiency and user-friendliness.

One of the key features of the 135H is its energy-efficient design. Utilizing a robust refrigerant system, this model ensures optimal moisture removal while maintaining low energy consumption, resulting in significant cost savings for users. The 135H is engineered to operate effectively in various humidity conditions, making it suitable for use in basements, crawl spaces, and other high-humidity environments.

The unit boasts a high-capacity water removal capability, making it one of the most effective dehumidifiers in its class. With a maximum extraction rate of up to 135 pints per day, it can tackle even the most humid situations, helping prevent mold growth, protect valuable electronics, and preserve structural integrity in homes and businesses.

In terms of user interface, the 135H features an intuitive digital control panel, allowing users to easily set their desired humidity levels. The integrated hygrometer keeps track of the current humidity, providing real-time feedback and enabling effortless adjustments. Additionally, the unit is equipped with a continuous drainage option, allowing for hassle-free operation without the need to frequently empty the water reservoir.

Durability is another hallmark of the 135H, as it is constructed from high-quality materials designed to withstand demanding environments. Its compact design allows for easy installation and portability, making it user-friendly for both residential and commercial applications.

Further enhancing the user experience, the 135H is designed with noise reduction technologies, ensuring quiet operation while maintaining high-performance levels. This feature makes it an ideal choice for living spaces, offices, or environments where minimal disruption is essential.

In conclusion, the Therma-Stor Products Group 135H dehumidifier represents a perfect blend of efficiency, technology, and user-centric design. Its powerful moisture removal capabilities, combined with energy efficiency and smart features, make it an excellent investment for anyone looking to maintain optimal humidity levels and improve indoor air quality. This model highlights Therma-Stor's commitment to providing high-quality solutions for environmental control, addressing the diverse needs of modern users.
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