How to Match a GMCC, Gree or Highly Compressor: Reading Model Codes, Refrigerant and Suffix Before You Order
A replacement rotary compressor that matches on tonnage can still be the wrong part. The mismatch rarely shows on the bench. It shows after charging, as a compressor that trips, runs hot or fails within weeks. GMCC, Gree and Highly turn up on a large share of UAE split and light commercial jobs, often inside units that carry a different brand on the casing. This guide, from the technical team at Haste Trading, explains how to read each brand's model codes, what to confirm before you order, and how to avoid the mistakes behind repeat callbacks.
GMCC and Highly supply compressors as components to many AC manufacturers, so the name on the outdoor unit often differs from the name on the compressor. Gree is both a finished-goods brand and a compressor maker, using its own compressors on many lines while sourcing others.
GMCC (Guangdong Meizhi Compressor) is a Midea Group company and is widely described as the world's largest maker of air conditioner rotary compressors.
Gree makes many of its compressors through Zhuhai Landa Compressor, a wholly owned subsidiary. A 2017 industry report also described Gree buying compressors from Shanghai Highly for other product lines.
Shanghai Highly is one of China's older and larger compressor makers, historically linked to Hitachi compressor technology.
The result is that a UAE technician doing compressor swaps will handle all three brands regularly, even on jobs where the unit carries another name.
Model codes are clues, not proof. The patterns below come from common examples, so always confirm the exact meaning in the manufacturer's datasheet. The full UAE model and application guide on Haste's blog covers each series in more detail.
GMCC PH-series (R22, single phase). Codes look like PH440G2CS-4MU1, a model from GMCC's current rotary compressor range. PH is the series family, and the three-digit number relates to model size and displacement. The block after it, such as G2CS, relates to frame and motor design. The suffix after the dash, such as 4MU1 or 4KU1, carries construction and electrical variants. It is the part most likely to differ between two compressors that otherwise look identical.
GMCC EH-series (R22, single phase). An older frame family, seen in codes such as EH130M1C-1DZDU1. The same rule applies: the number block relates to sizing and the suffix carries the detail.
Gree QX family. Gree's QX-series compressors are the brand's own-brand rotary units and use a QX prefix. Examples:
QXAS-F325N450A: R410A, single phase
QXAH-E25H050: R410A, single phase
QXSH-F49H050: R22, single phase
QXH-F37F050A: R22, single phase
QHX-C222B030A: R22, single phase
In these examples the QXA models are R410A and the QXS and QXH models are R22. That pattern holds for the examples listed and is not a universal rule across Gree's range, so confirm the refrigerant on the datasheet for the exact model.
Highly CG and CSL families. Commonly seen in the region for R407C and R410A, with entries such as CG433EB1-C, CG633GB1-A and CSL211CV. The prefix points to the frame and mechanical family, the number block relates to capacity, and the suffix carries voltage and electrical variant detail.
Highly units are less often stocked as standalone replacements in the UAE than GMCC and Gree, so contractors often cross-reference to an equivalent GMCC or Gree unit. That works only when the full specification matches, not just displacement.
Start with the failed compressor, not the outdoor unit. Record the full model code, refrigerant, displacement in cc, voltage and phase from the nameplate, then confirm each item on the datasheet.
Refrigerant first. R22 and R410A compressors are not interchangeable at the same displacement, because R410A runs at a significantly higher working pressure.
Displacement alongside capacity. Two compressors sold for the same "ton" can have different displacements. Use cc as one parameter next to rated capacity, operating conditions and electrical data.
Voltage and phase. Nominal UAE supply is 230 V single phase and 400 V three phase at 50 Hz, but confirm against the nameplate, because the same frame is built in several voltage variants.
Oil. Use only the lubricant the compressor manufacturer specifies for that model.
Connections and mounting. Suction and discharge port sizes differ between series, even at similar capacity.
Cross-brand swaps. Check rated capacity, operating envelope, frequency and phase, oil type, port sizes, electrical components and OEM approval, or use an officially approved cross-reference.
As a rough guide, GMCC PH-series and Gree QXS and QXH are typical for R22 residential splits, Gree QXA and newer GMCC R410A ranges for current R410A units, and Highly CG for light commercial and legacy R407C equipment. These are typical groupings, not fixed rules, and the nameplate always comes first. To compare ranges, browse the rotary compressors stocked by Haste.
Read the full nameplate on the failed compressor.
Find out why it failed, whether electrical, flood-back or contamination, before ordering.
Where there is contamination or a burnout, follow the OEM cleanup and oil change procedure. Do not reuse old oil.
Leak test the circuit with dry nitrogen and repair any leaks.
Evacuate to the correct micron target, confirm with a standing vacuum test, and only then charge.
Matching on tonnage alone
Ignoring the suffix on the model code
Assuming a similar-looking code means the same refrigerant
Reusing old oil in the new compressor
Skipping the root-cause check on the original failure
Buying from a source that cannot confirm the part, since OEM, remanufactured and grey-market units can share the same model codes
Each of these is quick to avoid at the ordering stage and costly to fix once the system is running.
Can I swap a GMCC for a Gree compressor? Not by brand name. Sometimes, if an approved cross-reference or a full match of application, mechanical and electrical specifications confirms it.
What does the number in a GMCC PH code mean? It relates to model size and displacement. Verify it on the datasheet and check the suffix as well.
Can an R410A compressor replace an R22 one? No. The pressures differ, and the compressor, oil and system parts are not designed for cross-use.
Does Gree use its own compressors? Yes, many through Zhuhai Landa, and it has also sourced from Shanghai Highly for other lines.
What supply voltage do UAE residential splits use? Typically 230 V single phase at 50 Hz, and 400 V three phase for larger commercial units. Check the nameplate.
A good replacement comes from reading the whole nameplate, confirming the refrigerant and suffix on the datasheet and finding the cause of the first failure. Take those extra minutes before you order and the new compressor has a fair chance of lasting.
Haste stocks GMCC and Gree rotary compressors across R22 and R410A ranges for HVAC and refrigeration contractors in the UAE. For help matching a failed compressor, get in touch with the Haste Trading team in Dubai, Sharjah or Abu Dhabi.