SECOP MB3CKV Electronic Unit for Compressors Instructions
- September 11, 2024
- SECOP
Table of Contents
MB3CKV Electronic Unit for Compressors
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Product Information
Specifications:
- Model: Electronic Unit for MB3CKV Compressors
- Part Number: 8238-65
- Operating Voltage: 24V DC
Product Usage Instructions:
Power Supply:
The electronic unit should be used with the SDD Power Management
Module (SDD PMM) 101N3110 as a power supply. Connect the two units
according to the diagram in Fig. 1. Do not use the + pin above LIN
to power the electronic unit; it is an unprotected output meant to
connect directly to the battery +.
Solar Start Optimization:
To maximize operating time in solar direct drive applications,
the electronic unit features an optimized starting algorithm for
solar direct drive. This algorithm reduces the starting current
demand by adjusting the torque buildup, enabling the unit to start
efficiently even with low morning sun.
Battery Protection:
The battery protection function of the electronic unit is
disabled by the solar drive power management system. The unit is
designed for operation without a battery.
Fan Connection:
A fan can be connected to the FAN OUT terminals. Connect the
positive lead to F+ (FAN OUT) and the negative lead to F-.
Error Handling:
If the electronic unit detects an operational error, the error
can be viewed in the software. Refer to the error codes defined in
Fig. 3 for troubleshooting. Note that the electronic unit does not
have an LED indicator function.
FAQ
Operational Errors:
-
Error Code 7 – Communication Error:
Communication of customer display stopped for 15 minutes
(default). -
Error Code 6 – Thermostat Failure: NTC
thermistor short-circuit or no connection, causing the unit to
enter manual mode. -
Error Code 5 – Thermal Cut-Out: PCB
temperature exceeds minimum or maximum limits. -
Error Code 4 – Minimum Motor Speed Error:
Motor unable to maintain minimum speed under heavy load. -
Error Code 3 – Motor Start Error: Rotor
blockage or high differential pressure in the refrigeration
system. -
Error Code 2 – Fan Over-Current Cut-Out: Fan
overloading the electronic unit. -
Error Code 1 – Battery Protection Cut-Out:
Voltage outside of the cut-out setting.
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Instructions
Electronic Unit for MB3CKV Compressors
8238-65
101N2742, 24V DC
Fig. 1
Fig. 2
SDD PMM
101N3110
8908
COMPRESSOR
OUT
LIN C
! Optional third screw: max. torque: 0,9 Nm
Fan
101N2742
Thermostat or NTC resistor
t°
8929-4
The + output above LIN is not suitable to supply the controller with power. It
is a unprotected output, directly connect to battery +. Rated max. current: 1A
Recommended RAST connector types
Power Supply
2-circuit Molex: 945504102
Fan
2-circuit Molex: 945504202
Display/Communication 3-circuit Molex: 932504023
Thermostat Machine Compartment
3-circuit
Molex: 932504003
Periphery SDD Power Management Module Thermistor multi-pack
101N3110 105N9615
Crimp connectors 6.3 mm | 1/4 inch
Cable Diameter Connector
0.5 mm² – 0.75 mm² Molex: 945180100
0.75 mm² – 2.5 mm² Molex: 945180201
for 2 wires 1.5 – 3.0 mm2 total
Molex: 945180400
Fig. 3
Operational errors
Error code
Error type
Can be read out in the software TOOL4COOL®
7 Communication error
(Communication of customer display stopped for 15 minutes (default)).
6 Thermostat failure
(If a NTC thermistor is short-circuit or has no connection, the electronic
unit will enter manual mode).
5 Thermal cut-out of electronic unit (PCB temperature exceeds minimum or
maximum limits).
4 Minimum motor speed error (If the refrigeration system is too heavily
loaded, the motor cannot maintain minimum speed at approximately 2,150 rpm).
3 Motor start error
(The rotor is blocked or the differential pressure in the refrigeration system
is too high (>5 bar)).
2 Fan over-current cut-out (The fan is overloading the electronic unit).
1 Battery protection cut-out (The voltage is outside the cut-out setting).
Wire dimensions DC
Size
Max. length 24V operation*
Cross AWG Cables longer than 5 meters
section
are not supported
[mm2] [Gauge] [m] [ft.]
2.5
12
5
16
*Length between battery and electronic unit
ENGLISH
This electronic unit is intended for use in a solar direct drive system (SDD)
as a motor control unit for the SDD Power Management Module (SDD PMM)
101N3110. Its battery protection functionality is deactivated when connected
to a solar direct drive power management system. Although the electronic unit
101N2742 is compatible with TOOL4COOL®, it is not intended to be used stand-
alone, but only in combination with the 101N3110.
Installation (Fig. 1) Attach the electronic unit by pressing it linearly onto
compressor Fusite® connector and brackets. Press until both screwheads snap in
place. Optionally the unit can be secured against excessive vibration with a
third screw.
Power supply (Fig. 2) The electronic unit shall be used with SDD Power
Management Module (SDD PMM) 101N3110 as a power supply. Connect the two units
according drawing in Fig. 1. Do not supply the electronic unit via the + pin
above LIN. The + pin is a power output and supplies any periphery with input
power up to 1A load. The connector can not be used to supply the unit with
power.
Solar start optimization To extend the operating time of a solar direct drive
application, this electronic unit has a starting algorithm optimized for solar
direct drive. Its starting current demand is reduced by building up the torque
differently, allowing the unit to start already with morning sun.
Battery protection The battery protection function of the electronic unit is
deactivated by the solar drive power management system. The electronic unit is
intended for operation without a battery.
Thermostat (Fig. 2) The thermostat is connected between the terminals C and T.
Either a NTC (electrical thermostat) or a mechanical thermostat can be
connected. Three different thermostat modes can be chosen in the software –
Auto (both NTC and mechanical), NTC or Mechanical. Standard setting is Auto.
In case of using a NTC the set point in the range between -40ºC and 40ºC is
set with the software and the temperature can also be seen by using the
interface. When using the Auto setting in the software it is not possible to
obtain NTC failures, so it is recommended to set the thermostat mode to NTC
when using a NTC.
Fan (Fig. 2) A fan can be connected to the FAN OUT terminals. Connect the plus
to F+ (FAN OUT) and the minus to F-.
Since the output voltage between the terminals F+ (FAN OUT) and F- is always
regulated to 12V, a 12V fan must be used for both 12V and 24V power supply
systems. The fan output can supply a continuous power of 6Wavg. Fan settings
can be adjusted via TOOL4COOL®. It is also possible to set a start delay on
the fan in the range from 0 240 sec.. Factory default setting for a fan is 0
seconds. Fan speed can be adjusted through the interface from 40 100%.
Error handling (Fig. 3) If the electronic unit records an operational error,
the error can be read out in the software. Error codes are defined as shown in
Fig. 3 The electronit unit does not have a LED function.
Machine compartment temperature The electronic unit disables the compressor
operation in case its PCB exceeds the maximum limits. The electronic unit does
not limit the compressor to operate in its released conditions. It must be
ensured the machine compartment temperature does not exceed the compressors
maximum ratings, otherwise it might be damaged. Min. PCB temperature: -10°C
(14°F) Max. PCB temperature: 110°C (230°F) Please refer to the compressor
datasheet regarding operating conditions and machine compartment temperature.
Secop accepts no responsibility for possible errors in catalogs, brochures,
and other printed material. Secop reserves the right to alter its products
without notice. This also applies to products already
on order provided that such alterations can be made without subsequential
changes being necessary to specifications already agreed. All trademarks in
this material are the property of the respective companies. Secop and the
Secop logotype are trademarks of Secop GmbH. All rights reserved.
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DES.I.102.I1.02 / 520N1322
April 2024