Mitsubishi Electric MCC-50A Quick guide

Air Conditioning Control System
Cloud system connection device
MCC-50A
Before installing the device, please read this Installation Manual carefully to ensure proper operation.
Retain this manual for future reference.
Installation and Instructions Manual
Safety notes are marked with WARNING
or CAUTION, depending on the severity
of possible consequences that may result
when the instructions are not followed
exactly as stated.
Proper installation is important for your
safety and proper functioning of the units.
Thoroughly read the following safety
precautions prior to installation.
Contents
1. Safety precautions ..................................................... 2
1-1. General precautions..............................................................2
1-2. Precautions for unit installation .............................................3
1-3. Precautions for electrical wiring ............................................3
1-4. Precautions for relocating or repairing the unit .....................4
1-5. Additional precautions ...........................................................4
2. Introduction ................................................................ 6
2-1. Part names............................................................................6
3. Package contents....................................................... 8
4. Specifications ............................................................. 9
4-1. Product specifications ...........................................................9
4-2. External dimensions............................................................10
5. Installation .................................................................11
5-1. Items not included ...............................................................12
5-2. Items sold separately ..........................................................12
5-3. Installation space ................................................................13
5-4. Installation procedures ........................................................14
6. Wiring connections................................................... 17
6-1. Removing/reinstalling the service cover..............................17
6-2. Connecting AC power cables and M-NET transmission
cables..................................................................................19
6-3. Connecting to the cloud system via a wired network ..........21
7. Initial settings ........................................................... 22
7-1. Registration to the cloud system .........................................22
7-2. Network settings..................................................................23
7-3. Cloud system connection check..........................................28
7-4. Registration of the M-NET address and air conditioning
units.....................................................................................28
8. Test run .................................................................... 29
9. Connection to external devices ................................ 30
9-1. External signal input/output function ...................................30
10.Maintenance............................................................. 32
10-1. Inspection and maintenance .............................................32
10-2. Software update ................................................................33
<ORIGINAL>

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1. Safety precautions
►Thoroughly read the following safety precautions prior to installation.
►Observe these precautions carefully to ensure safety.
►After reading this manual, pass the manual on to the end user to retain for future
reference.
►The user should keep this manual for future reference and refer to it as necessary. This
manual should be made available to those who repair or relocate the units. Make sure
that the manual is passed on to any future air conditioning system user.
►All electrical work must be performed by qualified personnel.
: indicates a hazardous situation which, if not avoided, could result in
death or serious injury.
: indicates a hazardous situation which, if not avoided, could result in
minor or moderate injury.
: addresses practices not related to personal injury, such as product
and/or property damage.
1-1. General precautions
Do not install the device in areas where large amounts of oil, steam, organic solvents, or
corrosive gases (such as ammonia, sulfuric compounds, or acids), or areas where acidic/
alkaline solutions or special chemical sprays are used frequently. These substances may
significantly reduce the performance and corrode the internal parts, resulting in electric
shock, malfunction, smoke, or fire.
To reduce the risk of injury, electric shock, or fire, do not alter or modify the device.
To reduce the risk of electric shock, malfunction, smoke, or fire, do not touch the electrical
parts with wet fingers.
To reduce the risk of injury or electric shock, before spraying a chemical around the
device, stop the operation and cover the device.
To reduce the risk of burns, do not touch the electrical parts with bare hands during and
immediately after operation.
To reduce the risk of injury, keep children away while installing, inspecting, or repairing the
device.
Test runs, inspection, and service must be performed by qualified personnel in accordance
with this manual. Incorrect use may result in injury, electric shock, malfunction, or fire.
If you notice any abnormality, stop the operation and turn off the device. Continuing the
operation may result in electric shock, malfunction, or fire.
Properly install all required covers to keep moisture and dust out of the device. Dust
accumulation and the presence of water may result in electric shock, smoke, or fire.
To reduce the risk of frostbite, burns, injury, or electric shock, keep the equipment out of
the reach of children.
To reduce the risk of short circuits, current leakage, electric shock, malfunction, smoke, or
fire, do not wash the device with water or any other liquid.

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To reduce the risk of fire or explosion, do not place flammable materials or use flammable
sprays around the device.
To reduce the risk of electric shock or malfunction, do not touch the switches or buttons
with a sharp object.
To reduce the risk of injury, electric shock, or malfunction, avoid contact with the sharp
edges of certain parts.
To reduce the risk of injury, wear protective gear when working on the device.
Wear protective gear when working on the device. High-voltage parts pose a risk of electric
shock, and high-temperature parts pose a risk of burns.
Consult the cloud system service provider for the proper disposal of the device.
1-2. Precautions for unit installation
Do not install the device where there is a risk of flammable gas leaks. If flammable gas
accumulates around the device, it may ignite and cause a fire or explosion.
Properly dispose of the packing materials. Plastic bags pose a suffocation hazard to
children.
Take appropriate safety measures against earthquakes to prevent the device from causing
injury.
To prevent injury, install the device on a flat surface strong enough to support its weight.
Use the supplied or specified parts for installation.
To reduce the risk of short circuits, current leakage, electric shock, malfunction, smoke, or
fire, do not install the device in a place exposed to water or in a condensing environment.
The device must be installed by qualified personnel according to the instructions detailed
in this manual. Improper installation may result in electric shock or fire.
1-3. Precautions for electrical wiring
To reduce the risk of malfunction, smoke, fire, or damage to the device, do not connect the
power cable to the signal terminal block.
To reduce the risk of malfunction, smoke, fire, or damage to the device, do not apply a
power supply voltage in excess of that specified.
Properly secure the cables in place and provide adequate slack in the cables so as not to
stress the terminals. Improperly connected cables may break, overheat, and cause smoke
or fire.
To reduce the risk of injury or electric shock, switch off the main power before performing
electrical work.

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Electrical work must be performed by qualified personnel in accordance with local
regulations and the instructions provided in this manual. Only use specified cables and
dedicated circuits. Inadequate power source capacity or improper electrical work will
result in electric shock, malfunction, or fire.
To reduce the risk of electric shock, install an overcurrent breaker and an earth leakage
breaker on the power supply. To reduce the risk of electric shock, smoke, or fire, install an
overcurrent breaker for each device.
Only use properly rated breakers (earth leakage breaker, local switch <switch + fuse that
meets local electrical codes>, moulded case circuit breaker, or overcurrent breaker). The
use of improperly rated breakers or the substitution of fuses with steel or copper wire may
result in electric shock, malfunction, smoke, or fire.
To reduce the risk of current leakage, overheating, smoke, or fire, use properly rated
cables with adequate current carrying capacity.
Proper grounding must be provided by qualified personnel. Do not connect the protective
ground wire to a gas pipe, water pipe, lightning rod, or telephone wire. Improper grounding
may result in electric shock, smoke, fire, or malfunction due to electrical noise
interference.
To reduce the risk of short circuits, electric shock, or malfunction, keep wire pieces and
sheath shavings out of the terminal block.
To reduce the risk of short circuits, current leakage, electric shock, or malfunction, keep
the cables out of contact with device edges.
To reduce the risk of electric shock, malfunction, or fire, seal the gap between the cable
and the end of the conduit tube with putty.
To reduce the risk of injury, do not touch the burrs of the knockout holes.
1-4. Precautions for relocating or repairing the unit
The device must be repaired or moved only by qualified personnel. Do not disassemble or
modify the device. Improper installation or repair may result in injury, electric shock, or
fire.
To reduce the risk of short circuits, electric shock, malfunction, or fire, do not touch the
circuit board with tools or with your hands, and do not allow dust to accumulate on the
circuit board.
1-5. Additional precautions
To avoid damage to the device, use appropriate tools to install, inspect, or repair the
device.
Appropriately set the broadband router, firewall, or other network settings so that the MCC-
50 is not accessed from an external network.

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Take appropriate measures against electrical noise interference when installing the device
in hospitals or radio communication facilities. Inverter, high-frequency medical, or wireless
communication equipment as well as power generators may cause the air conditioning
system to malfunction. The air conditioning system may also adversely affect the
operation of these types of equipment by creating electrical noise.
To avoid malfunction, do not bundle power cables and signal cables together or place
them in the same metallic conduit.
To avoid damage to the device, do not overtighten the screws.
To avoid deformation and malfunction, do not install the device in direct sunlight or where
the ambient temperature may exceed 55°C (131°F) or drop below -10°C (14°F).
This appliance is not intended for use by persons (including children) with reduced
physical, sensory or mental capabilities, or lack of experience and knowledge, unless they
have been given supervision or instruction concerning use of the appliance by a person
responsible for their safety. Children should be supervised to ensure that they do not play
with the appliance.

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2. Introduction
The MCC-50A controls the air conditioning systems from the special cloud system on the Internet. The MCC-50A
accesses the special cloud system via a wired network. To use the MCC-50A, a terminal device such as a computer,
tablet, or smartphone with connection to the Internet is required.
Hereafter, MCC-50A, unless otherwise specified, will be called “MCC-50.”
Note: Refer to the Kenza Cloud Operation Manual for detailed information on the initial settings, other settings, and
operations. See below for how to access the manual.
(1) Go to “www.mylinkdrive.com”.
(2) Select the required product market.
(3) Search “Kenza” in the search bar.
(4) Select the Kenza Cloud Operation Manual.
Note: This device is not suitable for use in locations where children are likely to be present.
2-1. Part names
Item Description
LED
POWER Lit in green Power ON
Unlit Power OFF
ON/OFF
Lit in green One or more air conditioning units are ON. *1
Blink in green One or more air conditioners, air-cooled chilling unit and other
related devices are in error.
Unlit All air conditioning units are OFF. *1
STATUS
Blink in white Connecting to the cloud system
Lit in green Being connected to the cloud system
Unlit Being not connected to the cloud system
Blink in orange Startup error
Blink in blue Software update in progress
Blink in pink Software update failed
LINK/ACT Blink in orange Communicating with a device connected via a LAN cable.
Push switch
COLLECTIVE ON/OFF Used to turn the connected air conditioning units ON and OFF
all at once.
RESET Used to reboot the MCC-50. (This will not affect the operation
status of the air conditioning units.)
*1 The operation status of the other equipment are excluded.
Top cover
POWER (LED) LINK/ACT
(LED)
· COLLECTIVE ON/OFF
· RESET
STATUS
(LED)
Push switch
Service cover
ON/OFF (LED)

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Item Description
SW1 Sets the network settings.
Refer to section 7-2 “Network settings”.
LAN Connects to the cloud system via LAN.
CN6 Do not use.
CN5 (External I/O) *1
Connects to an external input/output adapter PAC-YG10HA-E.
(When connecting an external input/output adapter PAC-YG10HA-E, cut out
the knockout hole.)
CN21 (M-NET power jumper)
Connects to the M-NET power jumper to supply power (default).
* If another system controller is connected to the same M-NET system and the power
consumption coefficient is 1.5 or above, disconnect the M-NET power jumper to supply
power from the separately-sold power supply unit.
TB3 (M-NET A, B, S) (M3.5)
M-NET transmission terminal block
Connects to M-NET transmission cables from the outdoor unit.
(A, B: Non-polarized, S: Shield)
TB1 (Power source AC L/L1, N/L2) (M3.5) Connects to the power cable.
Ground (M4) Connects to the protective ground wire.
*1 Refer to chapter 9 “Connection to external devices” for details.
* Under the service cover
LAN
CN6
CN5
TB3
Ground
CN21
TB1
SW1

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3. Package contents
The following items are included in the package.
Package contents Qty.
(1) MCC-50 1
(2) Connector (CN6) *1 1
(3) L-fitting 2
(4) DIN rail attachment
(for attaching DIN rail of 35 mm (1-7/16 in) width) 2
(5) DIN rail auxiliary bracket 1
(6) Roundhead screw (M3 × 12) *2
(for fixing DIN rail attachment) 4
(7) Roundhead screw (M3 × 6) *2
(for fixing DIN rail auxiliary bracket or L-fitting) 4
(8) Cable tie 4
(Two are spare.)
(9) Grommet 2
(10) Installation and Instructions Manual (this manual) 1
*1 Do not use.
*2 ISO metric screw thread

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4. Specifications
4-1. Product specifications
Item Specifications
Power supply 100–240 VAC ± 10%; 50/60 Hz Single-phase
M-NET power feeding coefficient 1.5
Network interface 100BASE-TX
Ambient
conditions
Temperature
Operating temperature
range -10°C – +55°C (+14°F – +131°F)
Storage temperature
range -20°C – +60°C (-4°F – +140°F)
Humidity 30%–90% RH (Non-condensing)
Dimensions (W × H × D)
172 × 209 × 100 mm
(6-13/16 × 8-4/16 × 3-15/16 in)
* 172 × 253 × 100 mm (6-13/16 × 10 × 3-15/16 in) when using
L-fittings
Weight 1.7 kg (3-3/4 lbs)
Installation conditions Only inside the metal control box

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4-2. External dimensions
(1) When using L-fittings
(2) When using DIN rail
Unit: mm (in)
100 (3-15/16)
169 (6-11/16)
172 (6-13/16)
209 (8-4/16) 241 (9-8/16)
253 (10)
100 (3-15/16)
39
(1-9/16)
L-fitting
(supplied)
L-fitting
(supplied)
DIN rail attachment
(supplied)
46 (1-13/16) DIN rail auxiliary
bracket
(supplied)
DIN rail
23 (15/16)
150 (5-15/16)

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5. Installation
Test runs, inspection, and service must be performed by qualified personnel in accordance
with this manual. Incorrect use may result in injury, electric shock, malfunction, or fire.
Do not install the device where there is a risk of flammable gas leaks. If flammable gas
accumulates around the device, it may ignite and cause a fire or explosion.
Take appropriate safety measures against earthquakes to prevent the device from causing
injury.
To prevent injury, install the device on a flat surface strong enough to support its weight.
To reduce the risk of short circuits, current leakage, electric shock, malfunction, smoke, or
fire, do not install the device in a place exposed to water or in a condensing environment.

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5-1. Items not included
The following items are required to install the MCC-50.
Items not included Specifications
Locknuts and bushing Must be suitable for the conduit tube to be used.
Sleeved ring terminal
M3.5 ring terminal (for AC power cables (L/L1, N/L2) and M-NET transmission cables (A, B,
S))
M4 ring terminal (for protective ground wire)
AC power cable/Protective
ground wire
Type: Sheathed cable (should not be lighter than ordinary sheathed cable IEC 60227.)
(designation 60227 IEC 53)
Recommended type: VCT, VVF, VVR, or its equivalent
Size: 0.75 to 2 mm² (ø1.0 to ø1.6 mm), AWG 18 to 14
Protective ground wire color: green/yellow
* Use a wire with an appropriate diameter so that the wire can be fixed with the cable tie below the
terminal block. A diameter of 10 mm (25/64 in) is recommended.
Transmission cable
Type: Shielded cable
●CPEVS ø1.2 mm
●CVVS 1.25 to 2 mm²
* CPEVS: PE*1 insulated PVC*1 jacketed shielded communication cable
* CVVS: PVC*1 insulated PVC*1 jacketed shielded control cable
Relay (for external input)
Contact rating
Rated voltage: 12 or 24 VDC
Rated current: 10 mA or above
Minimum applied load: DC 1 mA
Relay (for external output)
Operation coil
Rated voltage: 12 or 24 VDC
Power consumption: Max. 0.9 W
LAN cable (when connecting
to the cloud system using a
wired network)
Category 5 or above straight cable (Max. 100 m (328 ft))
Switching HUB (as necessary) A communication speed of 100 Mbps or faster is recommended.
Broadband router (as necessary) —
Overcurrent
breaker (fuse or
circuit breaker)
Fuse Rated current: 3 A
* When using a fuse, use it in combination with a switch (rated current: 3 A).
Circuit breaker
*2
Type: Bipolar (2P2E)
Rated current: 3 A
Earth leakage breaker *2
Type: Bipolar (2P2E)
Rated current: 3 A or above
Rated current sensitivity: 30 mA
Operation time: Max. 0.1 sec
A terminal device with connection
to the Internet PC, smartphone, tablet, etc.
*1 PE: Polyethylene, PVC: Polyvinyl chloride
*2 Use a breaker with a contact distance of 3 mm (1/8 in) or more.
5-2. Items sold separately
Items sold separately Model name Remarks
External input/output adapter PAC-YG10HA-E Required when using the external input/output function

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5-3. Installation space
The MCC-50 must be installed inside the metal control box.
Either the supplied L-fittings or DIN rail attachments can be used for the installation.
Leave a space around the MCC-50 as shown in the figure below.
50 (2) 50 (2) 50 (2)
When using L-fittings
50 (2) 50 (2)
When using DIN rail
Unit: mm (in)
50 (2)
50 (2)
150 (6)
100 (4)
50 (2)
150 (6)
100 (4)
DIN rail
DIN rail
Metal control
panel
Metal control
panel

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5-4. Installation procedures
Note
●The MCC-50 should be installed at a height up to 2 m.
●Connect the necessary cables and wires before installing MCC-50, referring to chapters 6 and 9.
●Do not install the unit where the unit may continuously receive vibration. The continuous vibration may cause the connectors
to disconnect.
●Before dismounting the MCC-50 from the metal control panel or from the DIN rail, disconnect the power cable and M-NET
transmission cables.
●Install the MCC-50 so that the arrow on the label points up.
5-4-1. Method 1: Installation using L-fittings
1. Have a metal control box ready.
2. Cut screw holes on the surface on which the MCC-50 will be installed as shown in the figure below, taking into consideration
the installation space.
3. Attach the supplied two L-fittings to the MCC-50 with the supplied roundhead screws (M3 × 6). Tighten the screw to a torque
of 0.5 N·m.
4. Properly install the MCC-50 with the M4 screws (not supplied) inside the metal control box as shown in the figure below.
①Temporarily tighten the top M4 screws.
②Temporarily place the M4 screws through the screw holes at the top of the L-fitting.
③Tighten the bottom M4 screws. Tighten the screw to a torque of 0.5 N·m.
④Tighten the top M4 screws. Tighten the screw to a torque of 0.5 N·m.
Note
●The MCC-50 to which the L-fittings are attached must be fixed to the metal control box with total of four M4 screws to prevent
it from falling.
●The surface on which the MCC-50 will be installed needs to be strong enough to support its weight (1.7 kg (3-3/4 lbs) each).
The arrow must point up.
100 (4)
M4
241
(9-8/16)
Unit: mm (in)
M4 screw
(not supplied)
Roundhead screw
(M3 × 6)
(supplied)
L-fitting
(supplied)
Inside the metal control
box
MCC-50
①④
③
②

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5-4-2. Method 2: Installation using DIN rail
1. Have a metal control box ready.
2. Attach the supplied two DIN rail attachments to the MCC-50 with the supplied roundhead screws (M3 × 12). Tighten the screw
to a torque of 0.5 N·m.
3. Attach the supplied DIN rail auxiliary bracket to the MCC-50 with the supplied roundhead screws (M3 × 6). Tighten the screw
to a torque of 0.5 N·m.
4. Mount the DIN rail (not supplied) to the metal control box.
* Use a DIN rail of 35 mm (1-7/16 in) width.
Note
●To secure the strength, the screw pitch must be 200 mm (7-7/8 in) or less when DIN rail is mounted to the metal control box.
●The surface on which the MCC-50 will be installed needs to be strong enough to support its weight (1.7 kg (3-3/4 lbs) each).
●Do not install the MCC-50 where it may receive vibration.
●To avoid the contact of the DIN rail fixing screws with the DIN rail attachment, do not tighten the fixing screws at the shaded
areas in the figure below.
DIN rail attachment
(supplied)
Roundhead screw (M3 × 12)
(supplied)
Roundhead screw (M3 × 6)
(supplied)
DIN rail auxiliary bracket
(supplied)
MCC-50
Max. 200 (7-14/16)
Unit: mm (in)
Do not tighten the fixing screw here.

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[Mounting/removing the MCC-50 on/from the DIN rail]
(1) Mounting
1. Hook the upper side of the attachments to the DIN rail.
2. Push the lower part of the MCC-50 until it snaps into place.
Note
●Ensure that the DIN rail attachments are fixed securely in place to the DIN rail.
(2) Removing
1. Pull the lower part of the MCC-50 toward you.
2. Remove the MCC-50 from the DIN rail.
Removing
Mounting

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6. Wiring connections
To reduce the risk of malfunction, smoke, fire, or damage to the device, do not connect the
power cable to the signal terminal block.
To reduce the risk of injury or electric shock, switch off the main power before performing
electrical work.
Electrical work must be performed by qualified personnel in accordance with local
regulations and the instructions provided in this manual. Only use specified cables and
dedicated circuits. Inadequate power source capacity or improper electrical work will
result in electric shock, malfunction, or fire.
To reduce the risk of electric shock, install an overcurrent breaker and an earth leakage
breaker on the power supply. To reduce the risk of electric shock, smoke, or fire, install an
overcurrent breaker for each device.
Proper grounding must be provided by qualified personnel. Do not connect the protective
ground wire to a gas pipe, water pipe, lightning rod, or telephone wire. Improper grounding
may result in electric shock, smoke, fire, or malfunction due to electrical noise
interference.
To reduce the risk of injury, do not touch the burrs of the knockout holes.
To avoid malfunction, do not bundle power cables and signal cables together or place
them in the same metallic conduit.
6-1. Removing/reinstalling the service cover
(1) Removing
1. Unscrew the two fixing screws on the service cover.
2. Remove the service cover.
Service cover
Openings on the MCC-50
Hooks on the service cover
Metric thread screw (M3 × 8)
(Black fixing screw)

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(2) Reinstalling
1. Insert the AC power cables and M-NET transmission cables into the openings, and then insert the hooks to the openings.
Note: Do not pinch the cables between the MCC-50 body and the service cover.
2. Screw down the service panel with the two fixing screws. Tighten the screw to a torque of 0.5 N·m.
3. Check that there are no pinched cables between the MCC-50 body and the service cover.
Do not pinch the cables between the
MCC-50 body and the service cover.
Opening for AC power cables
Opening for M-NET transmission cables

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6-2. Connecting AC power cables and M-NET transmission cables
Properly secure the cables in place and provide adequate slack in the cables so as not to
stress the terminals. Improperly connected cables may break, overheat, and cause smoke
or fire.
TB7
MCC-50
6-2-1. AC power cables and protective ground wire
1. Attach M3.5 sleeved ring terminals to the AC power cables, and attach an M4.0 sleeved ring terminal to the protective ground
wire.
2. Connect the AC power cables to the power supply terminal block, and connect the protective ground wire to the ground
terminal.
Note: Thread the protective ground wire through the guides to prevent the wire from moving when it is retightened to the ground terminal.
3. Fix the cables in place with the supplied cable tie.
Note
●Make the protective ground wire 25 mm (1 in) longer than the AC power cables (L/L1, N/L2).
●Tighten the terminal screws to a torque of 1.0 to 1.3 N•m.
●Properly fix the cable sheaths in place with the supplied cable ties. The distance between the sheath end and the ring
terminal must be 45 mm (1-13/16 in) or less.
●Fix the cables in place with the supplied cable tie.
By pulling the cables, check that the cables do not slip out of the cable tie.
M-NET transmission cables
for centralized control
AC power cables
Outdoor unit
Overcurrent breaker
Earth leakage breaker
100–240 VAC
45 mm
(1-13/16 in)
or less
Sheath
100–240 VAC
AC power cable
Cable tie (supplied)
Protective
ground wire
Guide
Guide
Cable sheath
Cable tie (supplied)

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6-2-2. M-NET transmission cables (Centralized control transmission cables)
1. Attach M3.5 sleeved ring terminals to the M-NET transmission cables (A, B, Shield).
2. Connect the M-NET transmission cables to the M-NET terminal block.
3. Fix the cables in place with the supplied cable tie.
4. When the power is supplied from the unit other than the MCC-50, disconnect the M-NET power jumper from CN21.
Note
●Provide a single point ground for the shield of the centralized control transmission cable. (Provide the appropriate grounding
according to local standards.)
●When leaving the M-NET power jumper connected to CN21 on the MCC-50, the M-NET S (shield) terminal of TB3 is
connected to the ground terminal block on the unit, and the ground is supplied via the protective ground wire.
●When disconnecting the M-NET power jumper from CN21 on the MCC-50, provide a ground point at a power supply unit
(PAC-SC51KUA).
●Tighten the terminal screws to a torque of 1.0 to 1.3 N•m.
●Properly fix the cable sheaths in place with the supplied cable ties. The distance between the sheath end and the ring
terminal must be 45 mm (1-13/16 in) or less.
●Fix the cables in place with the supplied cable tie.
By pulling the cables, check that the cables do not slip out of the cable tie.
45 mm (1-13/16 in)
or less
Sheath
To outdoor unit
M-NET transmission cables A and B
Cable tie (supplied)
M-NET transmission cable S (Shield)
CN21
Cable sheath
Cable tie (supplied)