Mitsubishi Electronics G-50A User Manual

Central Controller

Model: G-50A

Mitsubishi Electric Air-conditioner Network System

Instruction Book

Contents

1. Safety

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1

2.

Product feature

3.

Function

4.

User operation

5.

Initial setting

6.

Maintenance

7.

External input / output

3-1

Specification

3-2

Display screen

4-1

Operation condition monitor

4-2

Operation setting

4-4

Malfunction

…………

4-5

Current time setting

5-2

M-NET address setting

5-3

Function setting

5-4

Group configuration setting

5-5

Interlocked operation setting

6-1

Refrigerant system monitor

6-2

Malfunction log monitor

7-2

External output function

Before using the controller, please read this Instruction Book carefully to ensure
correct operation. Store this Instruction Book in a location that is easy to find.

7-1

External input function

5-6

Group name setting

5-7

User setting

5-8

IP address setting

5-9

Initial setting tools connection function

4-3

Timer operation

4-2-1

Group operation setting

4-2-2

Collective operation setting

2
4

4
8

10

11
12
12
16
19

23
24
25
25
25
26
27
29
31
34

35
35

36
36
37
38
38
39

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Appendix 2 :

User operation(adridged)

Appendix 1 : Initial setting(adridged)

40
42

5-1

Shifting to initial setting menu

G-50A

ON/OFF

CENTRAL CONTROLLER

1 . SAFETY

Please take a moment to review these safety precautions. They are provided for your protection and to prevent
damage to the controller.
This safety information applies to all operators and service personnal.
After you have read this manual, always observe the procedures described in the explanations and store it with
the installation manual in a location that is easy to find. If the controller is going to be operated by another per­son, make sure that this manual is given to them.

Symbols and Terms

WARNING
CAUTION

Statements identify condition or practices that could result in personal injury or loss of life.

Statements identify condition or practices that could result in damage to the controller or other property.

Specific Precautions

WARNING

• Ask your dealer or technical representative to install.

If incorrect inatallation is done by a customer, it may cause
an electric shock, fire, etc.

• Securely install in a place which can withstand the
weight of the controller.

If it is not enough, the controller may fall and cause an
injury.

• Make sure that the controller is connected to a rated
power supply.

If the controller is not connected to a rated power supply, it
may cause a fire or damage to the controller.

• Never remove the cover during operation.

Touching the charged parts of the controller may cause
severe burns or other personal injury.

• Stop the operation if any malfunction occurs.

If malfunction occurs (burning smell, etc.) stop the operation
and turn off the power supply. Contact your dealer or techni­cal representative immediately. If the controller continues to
operate after a malfunction occurs, this may cause damage,
electric shock or fire.

• Do not move and re-install the controller by yourself.

If installation is incorrect, it may cause an electric shock,
fire,etc. Ask your dealer or technical representative.

• Contact your dealer if the controller will not be used any
more or will be scrapped.

• Do not remodel or repair by yourself.

If the controller is redesigned or repair is not correct, it may
cause an electric shock, fire, etc.
Consult your dealer if repair is necessary.

• Stop the operation immediately and notify the your deal­er if an error code is displayed or malfunction occurs.

Fire or damage may be caused if the controller is operated
in this condition .

CAUTION

• Do not install the controller in a place where inflam­mable gas could leak.

If gas leaks and collects around the controller, it may cause
a fire or explosion.

• Do not wash the controller with water.

It may cause an electric shock or malfunction.

• Do not touch the switch with wet hands.

It may cause an electric shock.

• Do not use the controller for special applications.

This product is designed for use with the MITSUBISHI
ELECTRIC BUILDING AIR CONDITIONING CONTROL
SYSTEM. Do not use the system for other air condition man­agement operation or applications. It may cause malfunc­tions.

• Do not apply insecticide or flammable sprays to the
controller.

Do not place flammable spray near the controller and make
sure it does not blow directly on the controller as this may
cause in fire.

• Do not use the controller in special environments.

The performance may be reduce or parts may be damaged
if the controller is used in locations subject to large quanti­ties of oil (including machine oil), steam, sulfide gas.

• Do not touch the switches with sharp objects.

It may cause an electric shock or malfunction.

• Operate the controller within the specified temperature
range.

Observe the specified temperature range when operating
the controller. If the controller is used outside the specified
temperature range, it may cause serious damage. Be sure to
check the operation temperature range in the operation
manual.

-1-

2 . Product Features

[ 1 ] User operating function

The central controller is capable of controlling up to 50 air conditioner units. It supports the following operating

1. Virtually almost functions operated by local remote controller are supported.

2. Local remote control operation can be prohibited for specific functions.

3. Collectively setting

1. The weekly schedule enables four different schedule patterns to be set weekly per group. (P1-P4)

1. ON/OFF/MALFUNCTION status can be monitored by group or by unit.

1. The unit address where the malfunction occurred, the error code and address of the unit that detected

2. Pressing the reset key stops all the units connected to the same group, refrigerant system or linked group to the

the malfunction are displayed on the malfunction monitor screen.

unit where the malfunction occurred, all of these are reset.

2. The groups managed by the central controller may be displayed all together by group number or group name

3. When displaying all groups at once, individual groups can be turned ON or OFF by designating them by the
indicator .

(first three characters). Collective display of all unit address is also supported.

2. The respective daily patterns enable the setting of three different ON times (three prohibition times) and three

3. Easy setting

The central controller can be used to control the indoor units in specific group ON or OFF, select the operating

ventilation unit), select the fan speed, select the air direction (4 direction and swing operation), select the ventil­ation mode (OFF, LOW speed, or HIGH speed), select TIMER MODE and select the temperature setting.
In addition, room temperature can be displayed at the unit of each group upon request.

Access to specific control functions, such as ON/OFF operation, mode selection ,temperature setting and filter
sign reset operation can be prohibited for the local remote controls collectively or per group.

Operation setting can be performs collectively or per group.

Of these, three patterns are to set ON/OFF schedule and remaining one pattern is to set the pattern to prohibit op­eration of the local remote controller.

different OFF times (three permission times).

In addition, it is possible to set ON time only (prohibition time only) and OFF time only (permission time only).

Daily operation patterns and weekly schedules for one group can easily be copied to the other groups.

4. Timer automatic recovery operation when recovering from a power down is supported.

Four patterns (daily patterns) mentioned above enable the setting of individual schedule times for every group.

(See 5-5 "User setting")

mode (COOL, DRY, FAN, AUTO and HEAT) for the indoor unit or HEAT RECOVERY, BY-PASS, AUTO for the

(1) Operation

(2) Weekly Schedule

(3) Operating status monitor

(4) Malfunction monitor

function.

-2-

The central controller is supplied power from the PAC-SC50KUA Power Supply Unit via the M-NET transmission line and
DC power line. The DC power between the PAC-SC50KUA Power Supply Unit and the central controller should be 10m
or less. The central controller allows to be connected to M-NET transmission line at any position. (M-NET transmission
line is the central control line which connects TB7 terminal of the outdoor unit)

[ 2 ] System configuration setup and maintenance function

[ 3 ] Other

1. Registration can be made for the indoor units, local remote controllers and slave system controllers in the same

2. Group name may be specified. ( Names may include alphanumeric characters.)

3. Group name may be copied.

4. Setting of group configuration and specifying the group name may be performed as long as power is being supplied

5. System configuration data setting in the central controller can be deleted at once if necessary when replacing cir-

to the central controller. This mean that setting can be performed before the central controller is installed at
the site, before installation of individual units is completed or while the power supply to some units is cut off.

cuits wired board, etc.

All unit address (indoor, outdoor, etc.) can be displayed for individual refrigerant system on the refrigerant system
monitor screen. This information is useful for checking the installation, such as address setting, transmission line

connection and power supply connection.

Setting can be performed for indoor units interlocked with a ventilation unit.

If even one of the indoor units interlocked with ventilation have started to operate, the ventilation will be activated.

1. A log of the last 64 malfunction massage, in the order in which they occurred, can be monitored.

2. The data and time the malfunction occurred, the address of unit where it occurred, the error code and the ad-

3. All malfunction logged in the memory of the central controller and indoor unit can be reset at once.

dress of unit that detected the malfunction are displayed.

Displays normal operation/all OFF/malfunction status for the entire system.

This switch allows turning all of the unit in the system ON or OFF at once.

The combined maximum distance between the outdoor units and the central controller, and between the outdoor units
and farthest indoor units connected to the same refrigerant system or their remote controller, may be extended up
500 meters.
Therefore, even if the total distance is made longer by installing the outdoor units all in row, there will be no problem
so long as the above maximum total distance limitation is not exceeded.

(Normal operation/all OFF/malfunction status is indicated by the lamp being lit, not lit or blinking respectively)

group.
And also registration can be made for the ventilation such as OA processing unit.

(1) Setup for system configuration

(2) Refrigerant system monitor

(3) Interlocked group setting

(4) Malfunction log monitor

(1) Overall statues display lamp

(2) Collective ON/OFF switch

(3) Power supply wiring

(4) M-NET transmission line

-3-

Cool (Dry) operation : 19 30 ˚C / 67 87 ˚F
Heat operation : 17 28 ˚C / 63 83 ˚F

Auto operation : 19 28 ˚C / 67 83 ˚F

DC24V,0.02A(Maximum loading)
Power received from PAC-SC50KUA Power Supply Unit via M-NET transmission line.
DC12V,0.2A(Maximum loading)
Power is received from the PAC-SC50KUA Power Supply Unit via the DC power line.

Indoor unit or independent OA processing unit or LOSSNAY

: 50 units maximum (50 groups maximum)

Number of units (indoor or independent OA processing unit or LOSSNAY) in one group

: 1-16 units

*Note

register to the same group.

Indoor unit, independent OA processing unit and LOSSNAY can not

Number of remote controllers in one group

Number of system controllers in one group

Number of indoor units interlocked with one OA processing unit or LOSSNAY

: 1-2

: 0-4 (including the number of remote controller in one group)
: 0-3 for groups which have one remote controller.

: 0-16 (some types of OA processing unit can only be operated when inter-

locked to a maximum of 9 units)

3 . Functions

3-1 Specifications

Item

Source power requirement

Environmental condition

Temperature

Humidity

120(H) 300(W) 80[*19](D)
4-3/4(H) 11-13/16(W) 3-1/8[*3/4](D)

1.0
2-1/4

Kg

lb

mm

in

Dimensions

Weight

System condition

Number of control unit

User operating function

Operation

Fan speed

Air direction
and swing
operation

Temperature
setting

ON/OFF

Operation
mode

*1

*3

*1

*1

The ON/OFF operation can be performed as a collective or per group.

The switch operation for the operation mode setting can be performed as a collective
or per group.

[ Selectable operation mode for the indoor unit ]

[ Selectable operation mode for the independent ventilation ]

Cool/Dry/Fan/Auto/Heat

Heat recovery/By-pass/Auto

The switch operation to set the High and Low speed can be performed as a collective
or per group.

( The 4 fan speed setting is available to the indoor that has 4 levels )

The air flow direction can be switched to 4 directions and swing operation as a collec­tive or per group

Temperature setting can be performed collectively or per group.

[Setting temperature range]

Operating
Non operating

0 ˚C +40 ˚C / 32 ˚F +104 ˚F

-20 ˚C +60 ˚C / – 4 ˚F +140 ˚F

30 90%RH (No condensation)

Input voltage

Specification

*[ ] : indicate the thickness from the

wall.

-4-

ective or per group.

[Ventilation operation]

Low speed/High speed/Ventilation OFF

The overall status lamp displays conditions of the collective statues.

Item

Operation

Monitor

Prohibit local
remote

control

Specification

The specific functions of a local remote controller can be prohibited as a collective or
per group.

[Prohibit function]

ON/OFF operation, Operation mode setting, Temperature setting and Filter sign
reset operation.

The set schedule operations can be switched to ON/OFF (local remote controller
operation prohibition/permission) for each group.

The filter sign reset operation after the air filters are cleaned can be performed as a
collective or per group.

The ventilation operation of the interlocked OA processing unit or LOSSNAY can be coll-

Timer operation

Filter sign

Ventilation
operation

Collective
operation

Each group operation is displayed on the operation setting screen (group) or operation
monitor screen.

Each group
operation

Operation
mode

Fan speed
Air direction

Temperature
setting

Timer
operation

Filter sign
Local remote
control

Displayed on the operation setting screen (group).

prohibition

Ventilation
operation

Room
temperature

display

Central control
prohibition

External
input signal

condition

Malfunction

Current time
back-up

Timer setting

The unit address and error code are displayed on the malfunction monitor screen when
a malfunction occurs.

When the power is cut off, the current time is backed up for approximately one week.
(When the controller is fully charged. The controller is fully charged by twenty-four

hours after power feed.)

Operation pattern setting can be performed.

• Operation interval : Minimum 10 minutes

• The daily operation pattern and weekly schedule for each group can be set.

• "The reference temperature and set-back value" or "Setting temperature" which are

* ON/OFF setting up to three times a day are possible for P1/P2/P3.
* P4 enables to set operation prohibition of 3 times per day for the remote controller.

* P1 / P2 / P3 implement the schedule which has combined P1/P2/P3 of ON/OFF

* - is a day without timer operation.

linked with timer operation can be set.

pattern and P4 of remote controller operation prohibition pattern together.
( P1 = P1 + P4 / P2 = P2 + P4 / P3 = P3 + P4 is displayed.)

Other

*1
*3

*3

reset

• A pattern of one day : P1/P2/P3/ P1 / P2 / P3 / P4 / -

-5-

G-50A
management range

Unit

Unit

Another system controller
management range

of G-50A

Management range

M-NET Gateway
management range

Unit

Unit

ent OA processing unit, LOSSNAY and slave system controllers) are performed on
the group setting screen.

The interlocked setting for the ventilation equipment as the OA processing unit or
LOSSNAY , etc to indoor unit is performed on the interlocked setting screen.

A maximum of the 64 most recent malfunction are displayed on the malfunction log
monitor.

The connected unit address are displayed on the refrigerant monitor screen.

Some of the indication and function that appear on the each screen can be specified to

Master/Slave setting of the system controller.

match the needs of the user.

The setting of a system controller which the local remote control is prohibition enable or
disable.

Selecting of the prohibited controller which is only local remote controller or both
local remote controller and the other system controller.

The system composed of K-control type air conditioner equipment can be controlled
using the K transmission converter (PAC-SC25KAA)

Item

Group name
designation

External
signal input

interface
External

signal output
interface

Other

Initial setting (for installation and maintenance)

Interlocked
setting

Malfunction
history

Refrigerant
system monitor

User setting

Master system
controller/
Slave system

controller
setting

Prohibition
setting enable
/disable

The prohibited
controller
range setting

K-control
type

*2

*3

Group setting

Connecting
information
setting

Monitor

Other

*1 Each operation is available in accordance with the function of unit.
*2 Master system controller and slave system controller.

When G-50A controls another system controller or when
the system contains only G-50A :

G-50A is set as the master system controller.
* G-50A performs the group setting in this configuration.

When G-50A is controlled by another system controller :
(Example: MJ-300Gateway)

G-50A is set as the slave system controller.
* The group setting is performed by Master system

* G-50A does not
support slaves.

* G-50A does not support slaves.

controller.

Specification

Group name can be specified and display on the operation setting screen.
* Group name setting is need at the initial setting.

Emergency stop/normal, ON/OFF, prohibit/permit for local remote operation can be
controlled for units being controlled with a non-voltage contact signal input from an
external source.

When one or more units being controlled are operating, the "ON" signal will be out­put, and if a malfunction occurs in one or more units, the "malfunction" signal will
be output.

The group setting operation for units (indoor units local remote controllers, independ-

*3 OA processing unit (LOSSNAY) and the K transmission converter (PAC-SC25KAA) are not included in systems

shipped to North America (USA & Canada).

*3

*3

-6-

Master system

Group Group Group

controller

Slave system
controller

Group Group Group

Master system
controller 1

Master system
controller 2

Group

Group

Group

Group

Master system
controller 1

Master system
controller 2

Slave system
controller

NOTE :

The following group setting cannot be performed.

• Unit groups which are not under the management of the master controller and are managed by the slave
system controller.

• A common group is managed by more than two master controllers.

• A slave system controller which exceeds the management range of the master system controller of two or

more.

-7-

Display

P 4

NEXT

Continuously press

04-2002

MON

and

(2 seconds or longer)

G-50A

001

PROHI
BITED

01

3 - 2 Display Screen

The lamp indicates the unit op­eration condition.
ON During operation
OFF All group are stopping
BLINKING Malfunction

Overall status lamp

……

……

……

02

02

1

3

12

5

4

ENTER

NOTE: The temperature setting includes

a function to switch the display
between Celsius (

˚

C) or

Fahrenheit (

˚

F) (page 34).

-8-

POWER

GND

12VDC

91

CN2

51

CN1RS232C

Ethernet

ABS

M-NET

BACK

6 ADDRESS SETTING

7 FUNCTION SETTING

8 IP ADDRESS SETTING

VER.

LAN changeover switch

Refer to section "5. Initial setting ( page 25 ) " for
explanation of the operation of these switches.

LCD contrast adjustment knob

Rear side

Operation
panel

The collective operation switch can be per­formed in the user setting mode for any screen.
( Excluding menu screen )

If this switch is pressed during
the operation, a whole group stop
is performed.

Collective operation switch

LAN status lamp

Orange LED indicates action and green LED indicates link.

Service LAN connector

Refer to section "5. Initial setting " for an explanation of this connector.

DC power supply terminator

External input / output interface connecter

Refer to section "7. External input / out­put function ( page 38 )" for the detail
of operation of these connectors.

RS-232C connector

LAN(Ethernet)connector

M-NET Transmission
line terminal

M-NET address setting

Displays, or sets, the controller
M-NET address.
Refer to section "5. Initial setting
(page 25)" for a detailed explan­ation of operation.

Sets the function of the controll­er.Refer to section "5. Initial set­ting(page 25)" for a detailed ex­planation of operation.

Sets the LAN IP address.
Refer to section "5. Initial setti­ng(page 25)" for a detailed ex­planation of operation.

Maintenance

that

a

ADDRESS SETTING

FUNCTION SELECTS

IP ADDRESS SETTING

IP ADDRESS :

MASK ADDRESS:

192.168.001.001

255.255.255.000

ON

1234 5678

OFF

M-NET ADDRESS: 000

Function select setting

IP address setting

LOSSNAY

16-04-2002
014 6602

12 : 45

(DETECT 014)

05-04-2002

2002

2002

2002

012 6607

09 : 12

(DETECT 012)

.

GROUP NO

NONE

INDICATE

INDICATE

1-1-2001

NONE

7 TEMP. UNIT ˚C / ˚F

6

3

2

5

4

8

7

-9-

4 . User operation

Used the following two screens when user operation is performed.

Operation monitor screen This screen displays ON/OFF and malfunction condition of unit.

Operation setting screen The unit operations can be performed by individual group or collective

G-50A normally displays this screen.

operation. These operation include the ON/OFF, operation mode, fan speed,
temperature setting, air direction, ventilation setting, timer operation
ON/OFF, local remote controller prohibition and filter sign reset are
performed by group or collectively. In addition, this screen can also displays
the room temperature of each group.

Press the switch and

Press the switch.

Press the switch.

The unit operation can be verified in

Refer to section "4-1 Operation
condition monitor".

Press the (back screen) switch.

Press the or switch

(Individual group

operation setting
screen)

Each unit operation

(Collective

operation
setting screen)

setting is performed.

Refer to section "4-2 Operation setting".

to set "COL. (COLLECTIVE)" or
"GROUP" on the blinking display

and press the switch.

a single glance.

Press the or switch to set

"MON. (MONITOR)" on the blinking

display and press the switch.

Press the switch and

select "1. OPERATION MONITOR"

select "2. OPERATION SETTING"

• The collective operation can be performed on any screen (except for the menu screen) in the user operation

<Shifting to the operation monitor screen and operation setting screen>

<Returning to the user operation menu screen>

mode

.......

........

1

2

BACK
SCREEN

BACK
SCREEN

ENTER

ENTER

ENTER

-10-

• Note that operation is different for each of the following display methods.

Press the switch to change the display group in desired opera-

Press the switch to move the " " select the group
number to be operated.

Press the switch to set the displayed group unit is indicated by the
" " symbol to the on/off mode.

" " symbol to the on/off mode.

Press the switch to move the " " symbol. Select

Press the switch to set the displayed group unit is indicated by the

the group name to be operated.

tion and monitor.

When displaying the units in a given group, press the switch turn
all the units in that group ON or OFF.

*Displays up to the first 3 characters of the set group name.

Reverse:ON

Blinking: Malfunction during

units is off

Blinking and Reverse:

Malfunction during
unit is on.

*When a malfunction occurs, refer to section "4-4 Malfunction (page 23) ".

Normal:OFF

4 - 1 Operation condition monitor

• This function displays the ON/OFF/Malfunction status of specific units or group.

• ON/OFF/Malfunction status is shown by the indication corresponding to the unit or group appearing in inverse,

• The user may select display items by unit address, group number or group name.

• During the user operation mode, this screen returns from any screen if there is no operation for approximately

Refer to section "5-7 User setting (page 34)" for detail of user setting.

10 minutes.

(1) Operation Method

(2) Display contents

normal or blinking display.

1

2

1

2

1

2

1

ON/OFF

1

ON/OFF

1

ON/OFF

GROUP
SELECT

-11-

19 30 ˚C / 67 87 ˚F
17 28 ˚C / 63 83 ˚F
19 28 ˚C / 67 83 ˚F

4 - 2 Operation setting

4 - 2 - 1 Group operation setting

• There are two methods for the operation, performing the operation classified by groups or collective operation.

No.

Name of switches

Function Display

Ventilation

Operation status display

*When there is an interlocked OA processing unit

ON/OFF switch

The ON/OFF condition of the dis­played group is switched.

Operation mode
switch

Fan speed
switch

Temperature
setting switch

or LOSSNAY , turning this switch ON starts
operation in a [High] ventilated state.

Each time to push the switch, a mode is selected in

Used to the type of the operation
mode selection.

Note:

Operation mode can be selected ac­cording to the function of unit.
If the unit is only cooling type.
HEAT/AUTO mode may not appear
on the display.
Refer to the instruction manual of
the air conditioner for more detail.

The fan speed can be switched to four

On the group composed of independent LOSSNAY ,
operation mode is selected in a sequence that goes
from HEAT RECOVERY,AUTO, BY-PASS and back
to HEAT RECOVERY.

4 levels

2 levels

The setting temperature display.
The setting range change according to the operation

mode.

COOL/DRY
HEAT
AUTO

Fan speed display

a sequence that goes from COOL, DRY, FUN,
AUTO, HEAT and beck to AUTO for air conditioner

group.

levels. Switching may be 3 levels or 2
levels, depending on the model.

The setting temperature change is per­formed.

3 levels

NOTE: The temperature setting includes a function

to switch the display between Celsius (°C)
or Fahrenheit (°F) (page 34).

1

2

3

4

-12-