How to Fix Compressor Current Overload in Cold Plunge Chiller for Bathtub?

by | Mar 28, 2025 | BLOG

When you are using a water chiller to experience an ice bath, have you ever encountered a compressor current overload? Don’t worry, COLDCHILLER is here to provide you with a simple and easy solution to quickly restore your chiller to optimal working condition.
This guide will walk you through the causes of compressor current overload in the cold plunge chiller for bathtub and provide you simple and easy solutions by video and following text. Each step is accompanied by detailed operating instructions and safety tips.

Understand the Role of the Compressor in the Cold Plunge Chiller for Bathtub

The working principle of the cold plunge chiller for bathtub mainly goes through four core stages: evaporation, compression, condensation, and throttling, and it continuously circulates in these four stages, removing heat in the process to achieve the cooling effect. The chiller compressor plays an important role in the compression stage.

  • The compressor compresses the low-temperature and low-pressure refrigerant gas into a high-temperature and high-pressure gas, creating conditions for the refrigerant to release heat in the condenser.
  • The compressor increases the temperature and pressure of the refrigerant, helping to improve the efficiency of heat exchange.
  • The compressor can also control the flow and pressure of the refrigerant to ensure the smooth operation of the chiller.

Simply put, the core function of the compressor is to increase the pressure and temperature of the refrigerant. Therefore, if the compressor fails, it will affect the refrigeration effect of the chiller and shorten the service life of the compressor.

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Expert Investigation: Reasons for Compressor Current Overload

The E05 code refers to a current overload in the compressor. As a professional chiller manufacturer, COLDCHILLER has summarized several reasons for the compressor current overload of the chiller for you based on years of accumulation and experience.

The Air Inlet of the Chiller Is Too Close to the Wall

Placing the air inlet of the chiller (usually located behind the chiller) too close to the wall will affect the heat dissipation function of the compressor. Due to the lack of air circulation, the heat cannot be dissipated from the air inlet in time, and the internal temperature of the compressor is too high. Long-term high-temperature operation will cause the compressor to cause current overload, triggering the E05 warning of the chiller for cold plunge.

The Ambient Temperature Is Too High

The cold plunge chiller for bathtub cannot work normally when the ambient temperature is higher than 45℃. If the ambient temperature is too high, the water temperature at this time will also increase, the condensing pressure will increase, and the compressor will need more power to operate. In a high-temperature environment, in order to maintain the water temperature, the compressor needs to run for a longer time, and long-term high-load operation will cause the compressor current overload.

Chiller Placed Inside Bathtub

Some ice bath tubs usually places the chiller inside the ice bath tub. The closed environment has a certain impact on the heat dissipation of the compressor and condenser.

Condenser Grid Clogged

Condenser blockage is also one of the main reasons for compressor current overload. If the condenser is not cleaned for a long time, dust, dirt, debris and other impurities will block the condenser grid, hinder air circulation, and affect the heat dissipation of the internal machine.

Impact of Compressor Current Overload on Cold Plunge Chiller for Bathtub

Compressor current overload will affect the life of the cold plunge chiller for bathtub, increase operating costs, and damage electrical components.

Equipment Life

Compressor current overload means that the compressor will bear a greater load, especially the mechanical parts such as bearings and pistons will wear more. Long-term operation will affect the service life of the machine.

Increased Operating Costs

Compressor current overload will increase the power of the compressor, and the electrical energy required for its operation will also increase. Increased energy consumption leads to increased operating costs. Long-term high-load operation will also lead to increased operating costs.

Damage to Electrical Components

Compressor current overload will cause the various electrical components of the compressor to bear a greater current, which may cause risks such as short circuit and electric shock.

How to Solve Compressor Overload? Coldchiller Provides You with Professional Solutions

Although compressor current overload may shorten the compressor life and increase operating costs, don’t worry. Here, we provide you with a very comprehensive and practical solution with video and following text. Follow COLDCHILELR’s guidance and compressor current overload in cold plunge chiller for bathtub will be solved quickly.

Ensure Sufficient Distance

Move the air inlet of the chiller to at least 50cm away from the wall to ensure smooth air circulation and improve the heat dissipation effect of the chiler. It is worth noting that in order to ensure air circulation at the air inlet, it is best not to pile up debris at the air inlet.
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Set F11 (Compressor Current Overload Protection)

If your compressor of the water chiller has a current overload, you can solve it by setting F11. F11 is one of our many parameters, which stands for Compressor Current Overload Protection. Adjusting the current value of the compressor overload protection to a value greater than the current value that sounds the alarm is one of the solutions to deal with compressor failure.
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How to set F11? Find “Setting” in your control panel and click “Parameter”. A window will pop up. Enter the password “8888” and click “√” to enter the parameter page.
Slide down to find F11, click the value, and enter 15. Click “√” and then click “return” to return to the parameter interface.
Click “confirm setting”. Finally, click “return” to complete the setting.

Open the Vent of Some Cold Plunge Tubs

If your cold plunge chiller is placed in the tub, you need to open the vent cover of the cold plunge tub to allow better air circulation and enhance the heat dissipation effect of the chiller.
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Clean the Condenser Grid

Tools: electric drill, high pressure water gun, air gun
Steps:
Use an electric drill to unscrew the screws on the grid at the back of the chiller(save the unscrewed screws to avoid missing them during installation)
Clean the condenser grid with a high pressure water gun.
After cleaning, use an air gun to blow dry the condenser grid.
Make sure there are no water stains to avoid moisture affecting the use of internal electrical components.
Use an electric screw to screw the screws back on the grid.
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How to Avoid Compressor Failure? Solutions Inside

The compressor is the core component of the cold plunge chiller for bathtub, and its normal operation is very important to the chiller. Below we will talk about the maintenance recommendations for the compressor.

Chiller Installation Location Management

  • Place the chiller in a ventilated and cool place, and ensure that there is at least 50cm of heat dissipation space around the chiller.
  • Try not to place it in a dusty area. A dusty environment is prone to dust accumulation, which is not conducive to heat dissipation.
  • Avoid direct sunlight and ensure that the ambient temperature is below 40℃.
  • Clean up the debris around the chiller to avoid accumulation that affects the heat dissipation of the chiller.

Regular Cleaning and Maintenance

Clean the condenser grid regularly to ensure that it does not affect the heat dissipation of the chiller. The manufacturer recommends that you clean it every 3-6 months.
Clean the outer frame of the chiller regularly. It is best to clean it once a week.

Enhanced Heat Dissipation

If you are using an ice bath machine placed in the bathtub, you can open the vent cover when using it. Although there are already vents, opening the vent cover completely can enhance the ventilation effect.

Establish Maintenance Files

Establish maintenance files to record the time and specific location of each inspection or cleaning of the chiller, including the chiller frame and internal machines and electronic components, for systematic management.

By setting the F11 parameters correctly, maintaining good ventilation, and regularly cleaning the condenser grid, your chiller will achieve more stable operating performance. Knowing how to solve compressor failure can improve the operating efficiency of the cold plunge chiller for bathtub, extend the life of the compressor, and reduce maintenance costs.
If your cold plunge chiller for bathtub still has abnormalities, contact us for technical support. We will provide you with detailed solutions. Just follow us now to get more chiller fault code guides.

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alphasauna_kitty
My name is Kitty, I have more over 20 years working experience in the hot and cold therapy industry. I am the founder of the the brands of Alphasauna and ColdChiller, now is acting as the CEO of our company which is running with over 200 employees, outstanding with producing, selling, and exporting of Cold Plunge Chillers, Sauna Rooms, Ice Bath Tubs, and accessories.

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