1. Safety First (The “Unplug” Rule)

Before you touch anything, pull the power plug. It’s the easiest way to make sure nothing kicks on while your hands are inside the machine.

2. Relieve the Pressure

If this is a fridge or a water cooler, turn off the water line and try to get one last glass of water out. This drops the pressure so the filter doesn’t “pop” or spray you when you unscrew it. If it’s a compressor, bleed the air tank first.

3. The “Left-Loose, Right-Tight” Swap

Most 1/5 Hp systems use a simple twist-lock:

• Remove: Twist the old filter a quarter-turn to the left (counter-clockwise) and pull it straight out.
• Install: Pop the plastic caps off the new filter. Line up the little arrows or notches, push it in firm, and twist to the right until it clicks or stops.

4. The “Grey Water” Trick

If it’s a water filter, the first few cups will look cloudy or even blackish. That’s just harmless carbon dust. Run the water for about 3 to 5 minutes until it’s crystal clear.

Professional Commentary (The Spirit of the Craft)

“When we talk about a 1/5 HP compressor, we are essentially talking about the ‘heart’ of a domestic refrigerator or a small cooler. In this field, the fine details are what set a professional apart:

• The Quantity: Typically, this size requires about 200 to 250 ml (depending on the model and manufacturer, such as Danfoss or Jiaxipera). The golden rule here is ‘precision by the milliliter.’ Excess oil can lead to ‘Oil Logging’ within the cooling circuit, while a deficit causes friction that eventually kills the compressor.
• The Method: It’s not just about pouring oil; it’s a matter of integrity. You must ensure the old oil is completely drained while inspecting it for impurities. If the oil is black or has a burnt odor, it’s a clear diagnostic sign of the motor’s condition. As for recharging, it must be done via the service line using vacuum suction to ensure no moisture or air enters the system—moisture is the ultimate enemy of refrigeration oil.
• The Oil Type: This is the trap! The oil must be selected based on the refrigerant type. For instance, R134a requires synthetic POE oil, whereas older models or those running on R600a may require different specifications.

A final word: Someone asking about the ‘quantity and method’ is a technician who respects their craft and aims for perfection, not just someone trying to ‘get the job done.'”

1. Coupling

A coupling is used to connect two pipes of the same diameter. It features internal (female) threads on both ends. This is the go-to fitting for extending a straight run of pipe.

2. Hex Nipple

A hex nipple has external (male) threads on both ends. The “hex” refers to the hexagonal section in the middle, which allows a wrench to grip the fitting securely during installation. It is used to connect two female-threaded fittings or valves.

3. Reducer Hex Nipple

Similar to a standard hex nipple, but the two threaded ends are different sizes (e.g., transitioning from a 1″ pipe to a 1/2″ pipe). This allows you to join components of unequal diameters.

4. Tee

A T-shaped fitting with three openings. It is used to split a single line into two separate branches or to combine two lines into one. In the image, this specific tee features male threads on all three ends.

5. Hose Nipple (Barb Fitting)

This fitting is designed to connect a flexible hose to a threaded pipe system.

• Barbed Stems: These slide into the hose, and the ridges grip the interior to prevent it from slipping off.
• Hex Grip: Used to tighten the fitting into a threaded port.

6. Hex Bushing

A bushing is used to reduce the size of a female threaded opening. It has male threads on the outside and female threads on the inside. You would screw this into a larger port so that a smaller pipe or fitting can be attached to it.

Key Technical Note: Thread Types

The image mentions two common thread standards:

• NPT (National Pipe Tapered): Common in North America; the threads are tapered to create a liquid-tight seal.
• G (BSP – British Standard Pipe): Common in Europe and internationally; these are parallel threads that usually require a washer or O-ring to seal.

The main difference is the winding material: the GL80 uses aluminum coils, while the GL70 uses copper. Performance-wise, the GL80 is suitable for an upright deep freezer, whereas the GL70 is best for a 12ft double-door refrigerator
“The technical difference between the two compressors, manufactured by ZEM or ACC, lies primarily in the horsepower (HP) and displacement volume:

GL80: Has a slightly lower capacity, rated at approximately 1/5 HP

GL90: Typically rated at 1/4 HP (or equivalent, depending on the specific model

Technical Conclusion: Compressor Interchanges

1. Replacing GL80 by GL90 yes
2. Replacing GL90 by GL80 non
3. Replacing GL80 by GL70 non
4. Replacing GL70 by GL80 yes

“The process of replacing the air conditioner compressor is successful, and it is working as it was before.”

Alternatively, if you are asking whether the process is viable, it can be translated as: “Is replacing the air conditioner compressor effective, and will it work as well as it did before?”

Key Points regarding Compressor Replacement:

If you are considering this repair, here are a few things to keep in mind to ensure it works “as it was”:

• Matching Specifications: The new compressor must have the exact same cooling capacity (BTU) and electrical specifications as the original.
• System Flushing: It is vital to flush the refrigerant lines to remove any contaminants or burnt oil from the old compressor; otherwise, the new one may fail quickly.
• Vacuuming: A deep vacuum must be pulled on the system to remove moisture before recharging with gas.
• Cost-Benefit: Since the compressor is the “heart” of the AC, the repair can be expensive. If the unit is more than 10 years old, it is often more cost-effective to replace the entire unit.

The issues you are experiencing with your Brandt refrigerator (ice buildup, unusual noise, and poor cooling) indicate a failure in the No Frost defrost system. Since a specialist was unable to fix it, the fault may have been misdiagnosed.

Here is the translation of the causes and solutions provided:

Possible Causes and Solutions

1. Clogged Drain Line (Canal d’évacuation bouché)

• The Cause: When ice melts during the defrost cycle, water must flow into the rear tray through a drain tube. If blocked, water freezes in the evaporator, obstructing airflow and cooling.
• The Solution:

  1. Unplug the refrigerator.
  2. Locate the drain hole at the bottom of the freezer compartment.
  3. Pour hot water into the hole to melt any ice blockage.
  4. Use a thin wire or compressed air to ensure the tube is completely clear.

2. Faulty Ventilation Fan (Ventilateur bloqué ou HS)

• The Cause: The fan distributes cold air. If it gets stuck due to ice buildup or suffers a mechanical failure, it will make noise and the fridge will stop cooling.
• The Solution:

  1. After defrosting the unit, turn it on and check if the fan spins when the door is closed.
  2. If it doesn’t spin, try moving it manually. If it remains stuck, it likely needs replacement.

3. Defective Defrost Heater (Résistance de dégivrage)

• The Cause: This heater melts ice periodically. If it fails, ice will accumulate continuously.
• The Solution:

  1. Test the heater using a multimeter (Ohms setting).
  2. If the circuit is broken, the part must be replaced by a specialist.

4. Damaged Temperature Sensor or Thermostat (Sonde HS)

• The Cause: If the sensor is faulty, the system won’t know when to trigger the defrost cycle, leading to excessive ice.
• The Solution:

  1. Replace the sensor (this is usually an inexpensive and straightforward fix).

What Should You Do Now?

1. Manual Defrost: Manually defrost the unit and follow the steps above.
2. Monitor: If the problem returns after a few days, the issue is likely electrical (the heater, sensor, or timer/control board).
3. Professional Check: For a permanent fix, ask a technician to specifically measure the resistance (heater) and the sensor rather than just performing a manual defrost.

[!CAUTION] Important Advice: Never scrape ice with sharp tools (like knives) to avoid puncturing the cooling coils, which would cause a permanent refrigerant leak.

Our technical investigation revealed a dual issue. The system was suffering from a restricted filter drier, causing a blockage that choked the cooling cycle. This strain had also compromised the motor’s starting components.

Technical Specifications

Our intervention included:

• System Clearing: Replacing the clogged filter to allow the refrigerant to flow freely once again.
• Electrical Upgrade: Installing a brand-new high-quality “Starting Kit” (Relay/Overload) to ensure the compressor starts smoothly every time.
• The Mbsmpro Promise: We don’t just fix; we provide peace of mind. This repair is backed by a full 6-month warranty.

What Is the Danfoss SLV15CNK?

If you’ve ever opened the back panel of a commercial chest freezer or a light commercial display case and found a compact, brushless compressor with a controller module attached to it, there’s a good chance you were looking at a Danfoss Secop SLV15CNK. This variable-speed hermetic compressor is one of the most widely deployed LBP (Low Back Pressure) units in European and international commercial refrigeration — and for good reason.

Originally built under the Danfoss brand before the compressor division was spun off as Secop GmbH in 2010, the SLV15CNK has carved out a reliable reputation across commercial food retail, light industrial cooling, and even medical cold-chain applications. The unit pictured above — serial reference 561108N4, profile 104H — is the standard 220–240V, 50/60 Hz variant using R290 (propane) refrigerant, one of the most eco-friendly natural refrigerants available today.

Complete Technical Specifications Table

What Makes This Compressor Special?

Variable Speed Technology

Most technicians encounter fixed-speed compressors day in and day out. The SLV15CNK breaks that mold entirely. It’s a variable speed drive (VSD) compressor, meaning its speed adapts continuously between 2000 and 4000 RPM based on thermal demand. The result is dramatically reduced energy consumption during low-load periods, less mechanical wear, and quieter operation — all things that matter enormously in a commercial food retail environment where a freezer runs 24/7, 365 days a year.

R290 — The Natural Refrigerant Advantage

R290 (propane) is not new, but its adoption in commercial compressors has accelerated rapidly in recent years thanks to its near-zero Global Warming Potential (GWP = 3) compared to the synthetic alternatives it replaces. The SLV15CNK uses a maximum charge of just 150 grams, which keeps it below the safety threshold for flammable refrigerant use in occupied spaces. That tiny charge, combined with propane’s excellent thermodynamic properties, means this compressor achieves high efficiency with a very light environmental footprint.

The Controller Dependency

One detail technicians absolutely must not overlook: this compressor will not function without its dedicated SLV electronic controller (105N46xx series). The label on the unit itself clearly states “Only with SLV controller.” This is not a traditional hermetic compressor you can simply wire up to a relay and a capacitor. The controller handles speed regulation, current protection, speed monitoring, and thermal protection all in one unit. Replacing or sourcing this controller is as important as finding the compressor itself.

Fan Cooling Is Mandatory

At all ambient conditions (32°C, 38°C, and 43°C), the datasheet specifies F2 cooling — meaning fan airflow of at least 3.0 m/s directly on both the compressor body and the electronic controller unit. Attempting to run this compressor without proper forced airflow will trigger thermal protection and lead to premature failure. This is a common oversight when installers replace the compressor without checking the cabinet’s fan arrangement.

Replacement Compressors — Same Gas (R290)

When the SLV15CNK reaches end of life or fails, the most straightforward replacements use the same R290 refrigerant. Here are five proven options:

Replacement Compressors — Different Refrigerant

If R290 is not available in your region, or if you’re retro-fitting an older system, here are five equivalents using alternative refrigerants with comparable capacity:

⚠️ Important: Switching refrigerants requires changing the oil type, capillary tube, and verifying all safety certifications. Always consult the system manufacturer before cross-refrigerant replacement.

Typical Applications — Which Freezers Use This Compressor?

The SLV15CNK is the heart of many products you’ll recognize from the supermarket floor:

• AHT Australian series chest freezers (confirmed via MBSM documentation)
• Light commercial open-top island freezers
• Vertical display freezer cabinets (small commercial)
• Beverage coolers with sub-zero requirements
• Frozen food display cases at petrol stations and convenience stores
• Ice cream chest cabinets in retail environments

The AHT connection is particularly well-documented — AHT is a major manufacturer of commercial freezers widely deployed across European and African retail chains, and the SLV15CNK is one of their standard compressor choices.

Installation & Service Notes

A few practical points every technician should keep in mind when working with this unit:

Controller wiring: Always refer to the 105N46xx wiring diagram. Polarity and signal connections matter — the controller is not interchangeable between all SLV variants.

Refrigerant handling: R290 is flammable (Class A3). Work in ventilated areas, avoid open flames, and use an R290-certified manifold gauge set. The 150g charge limit means leaks are rare but must be taken seriously.

Oil compatibility: POE oil is mandatory with R290 in this application. Do not substitute mineral oil or alkylbenzene — POE is pre-filled at the factory at 600 cm³.

Mounting vibration: The compressor ships with rubber mounting grommets. Always re-use or replace them — running on a hard mount increases noise and mechanical fatigue.

Capillary tube: The reference capillary for AHT applications is approximately 3m / 0.31mm diameter, but always measure and verify against the original system before cutting new tubing.

Why This Compressor Matters in 2025 and Beyond

The refrigeration industry is at a turning point. Synthetic refrigerants with high GWP are being phased out under F-Gas regulations in Europe and similar legislation worldwide. The SLV15CNK — running on propane with a permanent magnet variable-speed motor — represents exactly the direction the industry is heading: natural refrigerants, intelligent speed control, and reduced energy consumption without compromising reliability.

For service technicians, understanding this platform deeply isn’t just useful today — it’s preparation for the next decade of commercial refrigeration work.

PHASE 1: SURGICAL IMAGE ANALYSIS

PHASE 3: ARTICLE STRUCTURE

SEO Metadata

• Focus Keyphrase: KCE444HAG Compressor
• SEO Web Title: Mbsmpro.com, Compressor, KCE444HAG, 3/8 HP, Copeland, R-134a, 1077 W, 2.2 A, 230V, HBP, CSCR, High Temp
• Meta Description: Technical specs for the Copeland KCE444HAG compressor. Includes LRA, displacement, electrical data, and equivalent drop-in cross-references for field techs.
• Slug: copeland-kce444hag-specs-replacement
• Tags: Mbsmgroup, Mbsm.pro, mbsmpro.com, mbsm, KCE444HAG, NEK6210Z, SC12G, NT1112Y, FL2088-SA, GP12TB
• Excerpt: Field data and technical breakdown of the Emerson Copeland KCE444HAG 3/8 HP commercial refrigeration compressor, including performance charts and direct replacement options.

Field Introduction

Found this slugger in a glass-door Coca-Cola merchandiser or a heavy-duty sandwich prep table? You are looking at the Emerson Copeland KCE444HAG. This 3/8 HP unit is a cast-iron workhorse built to handle the constant door-opening abuse of commercial beverage coolers. When a shop owner relies on cold drinks to keep the lights on, this HBP (High Back Pressure) compressor does the heavy lifting. It runs smoothly on R-134a, but when it finally locks up or burns out a winding, you need the hard numbers to wire it back up or drop in a reliable match. Let’s break down the specs.

Full Nameplate Data Table

Here is exactly what is stamped on the steel:

Technical Specifications Table

Knowing what the compressor is doing on the inside dictates how you size the metering device and handle the system charge.

Electrical & Origin Details

Wiring up a CSCR motor means you are dealing with potential relays and dual capacitors. Don’t mix up your start and run values, or you will bake the new start winding before lunch.

• Motor Circuit: CSCR (Capacitor Start, Capacitor Run) for high starting torque.
• Start Capacitor: 40-60 µF @ 230 V AC (Gets the heavy rotor moving against high head pressure).
• Run Capacitor: 10 µF @ 440 V AC (Keeps the power factor tight and the motor running cool).
• Relay Model: KARPN-4241 (Potential Relay).
• Overload Protector (OLP): KAT0072/H3 or MRA-12309-12101.
• Manufactured By: Emerson Climate Technologies (India) Limited.

Efficiency Metrics Table

Here is how the KCE444HAG pulls down at varying evaporator temperatures (assuming a standard 130°F / 54.4°C condensing temp):

Drop-in Replacements

If you can’t source a fresh Copeland KCE444HAG from the supply house, these 3/8 HP, ~12cc, R-134a HBP models will bolt right in and keep the cabinet at temp:

• Embraco: NEK6210Z
• Secop / Danfoss: SC12G
• Jiaxipera: NT1112Y
• GMCC: FL2088-SA
• Cubigel / Huayi: GP12TB