Technical data, tools and notes for refrigeration and electronics technicians.

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WPMR91S, the refrigerator requires exactly 13 grams of R600a refrigerant. mbsmpro
29, Jan 2026
WPMR91S, the refrigerator requires exactly 13 grams of R600a refrigerant.

The White Point WPMR91S is a high-efficiency 91-liter refrigerator utilizing a specialized 13-gram R600a refrigerant charge. Operating at 0.50A, this Turkish-made unit is designed for optimal LBP performance. This guide provides comprehensive technical specifications, compressor cross-references, and engineering insights for professional technicians and hobbyists looking for reliable maintenance data and…

EVCIS-24K-MD, The gas r410a charge weight is approximately 1.80 kg mbsmpro
29, Jan 2026
EVCIS-24K-MD, The gas r410a charge weight is approximately 1.80 kg

The Evvoli EVCIS-24K-MD is a robust 2.5 HP rotary compressor designed for 24,000 BTU split-type air conditioners. Running on R410A refrigerant with a 20.0A rated current, it offers high-efficiency cooling and heating (26,000 BTU). This technical guide explores its pressure limits, electrical requirements, and the best replacement compressors for HVAC…

Compressor, ZMC EGM66AF,  is an excellent fit for a 10-foot refrigerator mbsmpro
29, Jan 2026
Compressor, ZMC EGM66AF, is an excellent fit for a 10-foot refrigerator

The ZMC EGM66AF is a high-reliability 1/6 HP compressor designed for Low Back Pressure (LBP) applications in domestic refrigerators ranging from 10 to 12 feet. Utilizing R134a refrigerant and a 6.66cc displacement, this unit features durable copper windings and an RSIR motor, making it a preferred choice for technicians seeking…

Role of Current Relays in Compressor Ignition mbsmpro
29, Jan 2026
Role of Current Relays in Compressor Ignition

Selecting the right electrical components is the heartbeat of refrigeration maintenance. When a compressor fails to start or constantly trips, the culprit is often a mismatched Current Relay or a fatigued Thermal Overload Protector. Ensuring these parts align perfectly with the compressor’s horsepower (HP) and amperage rating is vital for…

MAQ QD168H, Can this compressor be installed in a 1.5-meter two-door refrigerator? mbsmpro
29, Jan 2026
MAQ QD168H, Can this compressor be installed in a 1.5-meter two-door refrigerator?

The MAQ QD168H is a high-performance 1/4 HP hermetic compressor designed for R134a refrigerant systems. Ideal for domestic refrigerators and freezers, it offers a cooling capacity of approximately 195W. This article provides a deep dive into its electrical characteristics, displacement, and compatible replacements to ensure a professional and efficient cooling…