Secop MB3CKV Direct Current Compressor
R600a, Medical, 12/24V DC
Model: MB3CKV
Refrigerant: R600a
Voltage: 12/24V DC
Application: Medical
General Information
| Code number (without electronic unit) | 109M0860 |
| Electronic unit - Solar | 101N2742, 40 pcs: 101N2743 |
| Compressors on pallet | 240 |
Application Range
| Application range | LBP/MBP |
| Voltage range | 9.6 - 17 / 19 - 34 VDC |
Cooling Requirements
| Application | LBP | MBP |
| 32°C / 38°C / 43°C | S | S |
S = Static cooling normally sufficient. Note: In case fan cooling is used: condenser ⇒ fan ⇒ electronic ⇒ compressor
Absolute Maximum Ratings
| Machine compartment temperature for compressor operation | -10 to 50 °C |
| Max. compressor tilt angle for temporary operation | ±30° |
| Operating pressure range | See diagram to the right |
Any levels of stress exceeding the absolute maximum value of machine compartment temperature range or operating pressure range or tilt angle may damage the device. Prolonged exposure to stress above the recommended operating conditions may also affect the device's reliability.
Operating Pressure Range Diagram: The diagram shows the relationship between condensing pressure and evaporation pressure at different temperatures. It indicates the safe operating limits for the compressor.
Motor
| Motor type | permanet magnet, brushless DC |
| Speed | variable speed rpm |
| Resistance, each of the three windings (25°C) | 3.1 Ω |
Design
| Displacement | 2.60 cm³ |
| Oil quantity (type) | 53 (polyolester) cm³ |
| Maximum refrigerant charge | 70 g |
| Free gas volume in compressor | 4.72 cm³ |
| Weight - Compressor/Electronic unit | 1.37/0.14 kg |
Standard Battery Protection Settings
| Voltage (0.1 steps) | Default | Min. value | Max. value | |
| 12V ± 0.3V DC, all values | Cut out level | 10.4 VDC | 9.6 | 17 |
| 24V ± 0.3V DC, all values | Cut out level | 22.8 VDC | 19 | 32 |
| Battery cut-in difference | 1.3 VDC | 0.5 | 10 |
Dimensions
Height: 89.0 mm (A)
Other dimensions:
- B: 82.4 mm
- B1: 48.7 mm
- B2: 45.8 mm
- C: 6.25°
| Suction connector | location/I.D. mm | angle | C | Copper | Rubber plug | ||
| Process connector | material | comment | location/I.D. mm | angle | D | 6.2 | 77.9° | Copper | Rubber plug |
| Discharge connector | material | comment | location/I.D. mm | angle | E | 5.0 | 86.9° | Cu-plated steel | Rubber plug |
| Connector tolerance | I.D. mm | ±0.09, on 5.0 +0.12/+0.20 |
Remarks: Please follow the brazing instructions on page 3 (Product Bulletin DES.N.101.M).
Performance Data Tables
The following tables provide performance data for the MB3CKV compressor under various conditions (ASHRAE LBP, EN 12900 Household/CECOMAF) at different speeds and temperatures.
Capacity (ASHRAE LBP) - 12V DC, static cooling [watt]
| rpm \ °C | -30 | -25 | -23.3 | -20 | -15 | -10 | -5 | 0 | 5 |
|---|---|---|---|---|---|---|---|---|---|
| 2,300 | 16.8 | 23.3 | 25.9 | 31.3 | 40.9 | 52.2 | 65.4 | 80.5 | 97.7 |
| 3,000 | 23.8 | 32.6 | 35.9 | 43.0 | 55.4 | 70.0 | 87.0 | 106.8 | |
| 4,000 | 32.5 | 44.7 | 49.2 | 58.9 | 75.8 | 95.7 | 119.1 | 146.4 | |
| 4,500 | 36.0 | 50.2 | 55.3 | 65.5 | 82.8 | 103.2 | 127.9 |
Power consumption - 12V DC, static cooling [watt]
| rpm \ °C | -30 | -25 | -23.3 | -20 | -15 | -10 | -5 | 0 | 5 |
|---|---|---|---|---|---|---|---|---|---|
| 2,300 | 16.8 | 20.2 | 21.4 | 24.0 | 28.2 | 32.5 | 36.8 | 41.1 | 45.1 |
| 3,000 | 21.9 | 26.6 | 28.2 | 31.3 | 36.1 | 40.9 | 45.6 | 50.2 | |
| 4,000 | 30.1 | 36.9 | 39.3 | 43.8 | 50.6 | 57.4 | 64.3 | 71.2 | |
| 4,500 | 34.4 | 41.8 | 44.3 | 49.0 | 56.0 | 62.9 | 69.7 |
Current consumption (for 24V applications the following must be halved) [A]
| rpm \ °C | -30 | -25 | -23.3 | -20 | -15 | -10 | -5 | 0 | 5 |
|---|---|---|---|---|---|---|---|---|---|
| 2,300 | 1.40 | 1.68 | 1.79 | 2.00 | 2.35 | 2.71 | 3.07 | 3.42 | 3.76 |
| 3,000 | 1.82 | 2.22 | 2.35 | 2.61 | 3.01 | 3.41 | 3.80 | 4.19 | |
| 4,000 | 2.51 | 3.08 | 3.27 | 3.65 | 4.22 | 4.79 | 5.36 | 5.93 | |
| 4,500 | 2.87 | 3.49 | 3.69 | 4.09 | 4.67 | 5.24 | 5.80 |
COP (EN 12900 Household/CECOMAF) - 12V DC, static cooling [W/W]
| rpm \ °C | -30 | -25 | -23.3 | -20 | -15 | -10 | -5 | 0 | 5 |
|---|---|---|---|---|---|---|---|---|---|
| 2,300 | 1.00 | 1.16 | 1.21 | 1.30 | 1.45 | 1.61 | 1.78 | 1.96 | 2.17 |
| 3,000 | 1.09 | 1.23 | 1.27 | 1.37 | 1.53 | 1.71 | 1.91 | 2.13 | |
| 4,000 | 1.08 | 1.21 | 1.25 | 1.35 | 1.50 | 1.67 | 1.85 | 2.06 | |
| 4,500 | 1.05 | 1.20 | 1.25 | 1.34 | 1.48 | 1.64 | 1.84 |
COP (ASHRAE LBP) - 12V DC, static cooling [W/W]
| rpm \ °C | -30 | -25 | -23.3 | -20 | -15 | -10 | -5 | 0 | 5 |
|---|---|---|---|---|---|---|---|---|---|
| 2,300 | 1.24 | 1.42 | 1.48 | 1.60 | 1.79 | 1.98 | 2.18 | 2.41 | 2.67 |
| 3,000 | 1.33 | 1.50 | 1.56 | 1.68 | 1.88 | 2.10 | 2.34 | 2.61 | |
| 4,000 | 1.32 | 1.48 | 1.53 | 1.65 | 1.83 | 2.04 | 2.27 | 2.53 | |
| 4,500 | 1.30 | 1.48 | 1.54 | 1.64 | 1.82 | 2.02 | 2.25 |
Test Conditions
| Test conditions | EN 12900 CECOMAF | ASHRAE LBP |
|---|---|---|
| Condensing temperature | 55°C | 54.4°C |
| Ambient temperature | 32°C | 32°C |
| Suction gas temperature | 32°C | 32°C |
| Liquid temperature | no subcooling | 32°C |
Accessories
| Mounting | Code number |
|---|---|
| Bolt joint for one compressor | 118-1960 |
| SDD Power Management Module | 101N3110 |
| SDD Connector Package | 105N9030 |
| Secop Gateway | 105N9518 |
Wiring and Connections
Power Supply: Connect to main switch and fuse. The compressor can be powered by 12V or 24V DC.
Optional Connections:
- Secop Gateway (105N9518) for communication via LIN or USB.
- PC option (TOOL4COOL®) for monitoring and control.
- Display for status indication.
- NTC resistor for temperature sensing.
- Mechanical thermostat.
Spade connectors: 6.3 mm | 1/4 in.
Wire Dimensions DC: Tables show recommended wire sizes and maximum lengths for 12V and 24V operation to minimize voltage drop.
Troubleshooting Guide (Error Codes / LED Flashes)
| Error code or LED flashes | Error type | Description |
|---|---|---|
| 7 Communication error | Communication error | Master controller communication stopped for 15 minutes (default). |
| 6 Thermostat failure | Thermostat failure | NTC thermistor short-circuit or no connection; electronic unit enters manual mode. |
| 5 Thermal cut-out of electronic unit | Thermal cut-out | PCB or machine compartment temperature exceeds limits. |
| 4 Minimum motor speed error | Minimum motor speed error | Motor cannot maintain minimum speed (approx. 2,150 rpm) due to heavy system load. |
| 3 Motor start error | Motor start error | Rotor blocked or differential pressure too high (>5 bar). |
| 2 Fan over-current cut-out | Fan over-current cut-out | Fan is overloading the electronic unit. |
| 1 Battery protection cut-out | Battery protection cut-out | Voltage is outside the cut-out setting. |
Error codes can be read out in the software TOOL4COOL®.
Product Bulletin: Brazing Instructions
Brazing on BD Nano Discharge Connector: This section provides specific instructions for brazing the discharge connector on Secop BDN45F/-A, BDN50K/-A, MB3CKV, and BDN-EV compressors.
Important Notes:
- The discharge connector element is sensitive to high heat.
- Ensure the area with the discharge connector element does not exceed 150°C / 302°F during brazing.
- Do not heat the bottom of the connector directly.
- Use a fork burner and/or a damp cloth. A protective plate can also be used.
- Do not braze longer than 10 seconds per attempt.
- Wait for 5 minutes between soldering attempts.
Further Information: Refer to Product Bulletin – Brazing Technique for Compressor Connectors (DES.N.600.A1.02).
Contact Information
Secop GmbH
Lise-Meitner-Straße 29
24941 Flensburg
Germany
Tel: +49 461 4941 0
Website: www.secop.com
