Mitsubishi Electric GB-24A User manual

––––

Air-conditioner Control System

Centralized Controller

Model: GB-24A Instruction Book

Contents

Before using the controller, please read this Instruction Book carefully to ensure correct operation.

Retain this manual for future reference.

1. Safety Precautions ...................................................1

2. Introduction ...............................................................3

3. Functions ..................................................................4

4. External input/output functions ...................................8

This manual describes how to operate the centralized controller. Before using the controller, read the

1 Safety Precautions section carefully to ensure proper installation.

Safety precautions are provided for your protection and to prevent damage to the controller.

The safety precautions apply to all operators and service personnel.

Safety symbols used in this manual

The following symbols are used in this manual to indicate the type and severity of potential consequences that

may result when given instructions are not followed exactly as stated.

WARNING Indicates a risk of death or serious injury.

CAUTION Indicates a risk of injury or damage to the controller.

Retain the Installation Manual and the Instruction Book for future reference. Make sure both the Installation

Manual and the Instruction Book are given to any future air condition system users.

WARNING

The controller must be professionally

installed.

Improper installation by an unqualified person may

result in electric shock or fire.

sk your dealer or an authorized technician

to move the controller.

Improper installation may result in electric shock

or fire or damage to the controller.

Make sure the controller is securely

mounted so that it will not fall.

To avoid causing damage or fire, do not apply

an AC voltage or a voltage higher than 30

to the M-NET terminal blocks on the

controller.

Do not attempt to modify or repair the

controller.

Modification or improper repair may result in

electric shock or fire.

Consult your dealer when repairs are

necessary.

Never remove the cover during operation.

Touching the charged parts of the controller

may cause severe burns or other personal

injury.

If any abnormality is noticed (e.g., burning

smell), stop the operation, turn off the power

supply, and contact your dealer or technical

representative immediately.

Continuing the operation may result in damage to

the controller, electric shock, or fire.

Stop the operation immediately and notify

your dealer if an error code is displayed and

the controller does not operate, or when any

abnormality is noticed.

Continuing the operation may result in damage

to the controller or fire.

1 Safet

Precautions

Controllers must be disposed of properly.

Contact your dealer for proper disposal

rocedures.

CAUTION

IMPORTANT

Do not install the controller where there is a

risk of leaking flammable gas.

If the leaked gas accumulates around the

controller, it may ignite and cause an explosion.

Do not use the controller in an environment

high in oil, steam, or sulfuric gas.

These substances may have adverse effects on

the performance of the controller or damage its

parts.

Do not wash the unit with water.

Doing so may cause an electric shock or

malfunction.

Do not install this controller where an acid or

alkaline solution or special chemical spray is

used frequently to avoid electric shock or

malfunction.

Do not spray insect sprays or sprays with

flammable propellants to the controller.

To avoid the risk of fire or explosion, do not place

flammable sprays near the controller or spray

them directly on the controller.

Do not use the controller for specialized

applications.

This product is designed exclusively for use with

the MITSUBISHI ELECTRIC building air

conditioning control system. The use of this

product with other air-conditioning management

systems or for other purposes may result in

malfunctions.

To reduce the risk of electric shock, install and

wire the unit with the power to the

PAC-SC50/51KUA power supply unit turned

off.

When installing the controller in a hospital or

communication facility, take appropriate

measures to reduce electrical noise

interference.

Inverter equipment, generators, high-frequency

medical equipment, or radio communication

equipment may interfere with the normal

operation of the controller; or the electrical noise

from the controller may interfere with the medical

practice or cause image distortion and static.

Operate the controller within the temperature

range specification.

The use of controller outside of its specification

may result in serious damage to the controller. Be

sure to check the temperature range specification

in the Instruction Book.

Do not install this controller in a place that

has the potential for steam or dew formation.

Steam or dew formation may cause an electric

shock or a unit malfunction.

Use a security device such as a VPN router

when connecting the GB-24A to the Internet

to prevent unauthorized access.

If no security devices are installed, the operation

settings may be changed by an unauthorized

person without the knowledge of the user.

Do not touch the PCB (Printed Circuit Board)

with your hand or a tool.

Keep the PCB dust-free to prevent fire or

malfunction.

Enable the “Automatic restoration after power failure” function on the air conditioning units.

Otherwise, the hold function will prohibit the schedule from being executed, and the units will remain

stopped even after power is restored. Enable this function for the units to automatically resume their

eration after

ower is restored.

2-1. About this manual

This manual covers the settings that can be made or functions that can be displayed only on the GB-24A.

2-2. Monitoring and operating the air conditioners

To monitor and operate the air conditioners, “GB-24A License Pack” license must be purchased. Purchase

the license from the dealer, and register on the Initial Setting Web or on the Web for Monitor and

Operation.

Refer to Web Browser Operation Manual for monitoring and operating the air conditioners.

The format in which the Web page address for each GB-24A is expressed on the Web browser, as well as

the default user name and password are shown below.

http://[IP address of the GB-24A]/administrator.html

Note: For example, type http://192.168.1.1/administrator.html if the GB-24A IP address is [192.168.1.1].

User Default

user name

Default

password

Managers administrator admin

2 Introduction

Notes

●After registering “GB-24A License Pack” Web Monitor,” “Annual Schedule,” “Weekly Schedule,”

“Sending Error Mail,” and “Maintenance Tool Advanced” functions will be available.

●Consult the dealer for information on other functions that require a license (i.e. “Maintenance Tool

(Simple)”).

●Ask the dealer for the Web Browser Operation manual, which covers monitoring and operating the air

conditioners.

●Initial settings, such as making group changes, are covered in the Initial Setting Web manual.

The format in which the Web page address for each GB-24A is expressed on the Web browser, as well

as the default user name and password are shown below.

http://[IP address of the GB-24A]/g-50/administrator.html

Note: For example, type “http://192.168.1.1/g-50/administrator.html” if the GB-24A IP address is [192.168.1.1].

User Default

user name

Default

password

Maintenance user initial init

●It is assumed that the GB-24A will be used on a private network. If connecting the GB-24A to the

Internet, use a security device such as a router with a VPN function to ensure security.

3-1. Specifications

Table 3-1. Specifications

Item Specifications

Interface M-NET: 30V DC/24V DC;0.13/0.15A

LAN: Ethernet 10Base-T

Input/output: 12V DC or 24V DC, (External power supply)

Temperature Operating range: 32 to 104ºF / 0 to 40ºC

Storage range: -4 to +140ºF / -20 to +60ºC

Environmental condition

Humidity 30~90%RH (No condensation)

Dimensions 51/8(H) ✕9

7/8(W) ✕1

1/2(D)in／130 (H) ✕250 (W) ✕38 (D) mm

Weight 2

1/2lb／1.1kg

Installation Environment

In control panel box (indoor)

Install this product indoors.

*This unit is installed and used in a business office, homes or equivalent

environment.

Number of control units

Indoor units, independent OA processing units or LOSSNAY

: 24 units maximum (24 groups maximum)

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

group

: 1-16 units

*Note: Indoor units, independent OA processing units, and LOSSNAY

can not register to the same group.

Number of remote controllers in one group

: 1-2

Number of system controllers in one group

: 0-4 (including the number of remote controller in one group)

: 0-3 for groups which have one remote controller.

Number of indoor units interlocked with one OA processing unit or

LOSSNAY

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

when interlocked to a maximum of 9 units)

Notes

●Refer to the WEB Browser Operation Manual for operating the GB-24A.

●Use the initial setting web to make initial settings via LAN.

3 Functions

3-2. Function list

GB-24A requires a license registration. By registering the license, group or block operation via the Web

browser will be permitted. License registration that permits various functions can be completed on the

license registration page.

Table 3-2. Web monitoring functions

Item Content

Start/stop Switching start/stop collectively or for each group

Operation mode Switching cool/dry/fan/auto/heat/setback collectively or for each group

Temperature setting Setting room temperature collectively or for each group

Set temperature range Cool/dry: 67ºF-87ºF /19ºC-30ºC

Heat: 63ºF-83ºF /17ºC-28ºC

Auto: 67ºF-83ºF /19ºC-28ºC

Setback: Upperlimit: 67ºF-87ºF/19ºC-30ºC

Lower limit: 53ºF-79ºF /12ºC-26ºC

*Note: Preset temperature range varies on different models.

Air velocity Switching air velocity in four steps collectively or for each group.

Air direction Switching in four steps vertically and for swing, keep for each group

(Selectable air direction depends on the indoor unit model)

Start/stop of interlocked

equipment (Lossnay)

Switching start (Hi/Lo)/stop collectively or for each group when connecting with

interlocked equipment (Lossnay).

(However, ventilation mode can not be selected for the interlocked equipment.)

Prohibition of local control Selecting the items for which local control is prohibited collectively or for each

group.

(Items include start/stop, operation mode, temperature setting and filter sign.)

Hold Prohibits the scheduled operation from being executed.

Error display Identifies the unit and displays the error.

Filter sign display and

reset

Filter sign display can be reset in each group or collectively.

Malfunction history Malfunction history can be check up to 64 contents in both unit and

communication error.

Annual/weekly schedule Using the annual/weekly schedule function by license registration.

Malfunction e-mail history E-mail history can be check up to 64 contents.

* The above specification may be changed depending on the equipment connected or combined.

* The block setting and the registration of block/group names require the initial setting web.

* Without prior notice, the content may be changed.

The table below the types of connectable units. Depending on the model and type, not all functions may be

available.

Model Notes

CITY MULTI

LOSSNAY

Mr. Slim

Room air conditioner Requires a M-NET adapter

3-3. Setting Functions

Perform initial settings with the Initial Setting Web.

Table3-3.Initial-settingfunctions

Item GB-24A

Initial Setting

Web Remarks

M-NET address

setting √The default value is 0.

IP address setting √

(Simple setting) √Simple settings have priority

over other settings.

Function selection

√

Presence/absence of

K transmission converter

Connection*1, local operation

prohibition setting, and external

input mode

Group registration √

Registering

interlocked

operation with the

Lossnay unit

√

Switch for start-up

mode √

Other settings √

*1: K transmission converter cannot be used. Select “Not used” for the K-control Units setting in the M-NET

Settings window.

1) How to set the IP address with dip switches

IP addresses between 192.168.1.1 and 15 can be set using the 4-pin dip switch on SW2.

Set this switch before turning the power on.

Note

●When setting IP addresses with the Initial Setting Web, set all four dip switches on SW2 to OFF.

1 2 3 4 Contents (IP address)

OFF OFF OFF OFF Address that is set with Initial Setting Web.

(Initial IP address setting is 192.168.1.1)

OFF OFF OFF ON Starts from 192.168.1.1

OFF OFF ON OFF Starts from 192.168.1.2

OFF OFF ON ON Starts from 192.168.1.3

OFF ON OFF OFF Starts from 192.168.1.4

OFF ON OFF ON Starts from 192.168.1.5

OFF ON ON OFF Starts from 192.168.1.6

OFF ON ON ON Starts from 192.168.1.7

ON OFF OFF OFF Starts from 192.168.1.8

ON OFF OFF ON Starts from 192.168.1.9

ON OFF ON OFF Starts from 192.168.1.10

ON OFF ON ON Starts from 192.168.1.11

ON ON OFF OFF Starts from 192.168.1.12

ON ON OFF ON Starts from 192.168.1.13

ON ON ON OFF Starts from 192.168.1.14

ON ON ON ON Starts from 192.168.1.15

(Inside the cover)

SW 2

1 2 3 4

OFF

2) Setting the service switch

The switches must be OFF for normal use. The switch setting change operates when the power is turned

on next time.

3-4. Service LED display

The LED displays the operation status of the unit as follows.

Table 3-4 List of services LED

LED No. Items Contents

Power supply

LED Power status ON : Power is supplied / OFF: Power is cut off

LAN LAN LINK ON : During LINK / OFF: No LINK

LAN LAN ACT Flash : During communication / OFF: No communication

LED1 Start-up ON : Start-up not completed / OFF: Start-up completed

LED2 Operation ON/OFF ON : 1 or more units are ON / OFF: All OFF

LED3 Error Flash : Error occurred on 1 or more units / OFF: Normal state

LED4 (not defined) -

LED5 (not defined) -

LED6 M-NET communication

(transmission)

Flash : During communication / OFF: No communication

1 2 Contents Remarks

OFF OFF

Starts with the normal

mode *This setting is for normal use.

ON OFF - Setting is prohibited.

OFF ON - Setting is prohibited.

ON ON

Starts with the update

mode

*The software can be updated with the

normal mode. If the update fails, or the

software does not work properly use

this setting to update the software

again.

*SW1-3 and SW1-4 are always OFF.

Notes

●When 15 or fewer GB-24A units are used in the air-conditioning network for, set the IP address via SW2 on the

unit.

●If the set IP address of GB-24A is forgotten, check the IP address that is registered on the monitoring PC (WEB).

GB-24A can be started by changing the setting of SW2 on GB-24A and using an arbitrary fixed

IP address as a temporary IP address. It is recommended to paste a sticker with the IP address on the unit, so

that the IP address of GB-24A is available at all times. Once GB-24A is started up with a temporary IP address,

a new IP address can be assigned to it on the Initial Setting Web.

SW 1

1 2 3 4

Not to be used

OFF

LED1-6

Power supply

LED LAN

POWER LAN LINK/ACT 1 2 3 4 5 6

*External signal input requires the external I/O adapter (Model: PAC-YG10HA), sold separately.

4-1. External input function

(1) The function of external input

• Emergency stop/normal operation, ON/OFF, local remote control prohibit/permit can be controlled for

conditioners on a system with a non-voltage contact signal input from an external input source.

(the dip switches)

• The condition of external input signal is displayed on the operation setting screen for each group.

Table 4-1. Function settings of external input

No. External signal input function Remarks

1 Do not use external input signal (factory setting)

Execute emergency stop/normal with level signal The local remote controller ON/OFF operations, and

the controller ON/OFF operation and prohibit/enable

change operations will be prohibited during

emergency stop.

Perform ON/OFF with level signal The local remote controller ON/OFF operations, and

the controller ON/OFF operations and

prohibit/enable change operations will be prohibited.

4 Perform ON/OFF, prohibit/enable with pulse

signals

Set the pulse width while the contact is ON to 0.5 to

1 sec.

*Settings for these functions can be set with the Initial Setting Web.

(2) Level signal and pulse signal

(3) External input specification

CN2 Lead wire

Emergency stop/normal level

signal

ON/OFF,

level signal ON/OFF, prohibit/enable pulse signal

No. 5 Orange Emergency stop/normal input ON/OFF input ON input

No. 6 Yellow Not used Not used OFF input

No. 7 Blue Not used Not used Local remote controller operation prohibit input

No. 8 Gray Not used Not used Local remote controller operation enable input

No. 9 Red External DC source “+” “12V DC” or “24V DC”

4 External in

ut/out

ut functions

(A) For level signal

1. When the emergency stop/normal signal is selected, the status will change from normal to

emergency stop when the external input signal contact changes from OFF to ON, and will change

from emergency stop to normal when the contact changes from ON to OFF. Emergency stop signal

will bring the air conditioners to stop, and canceling the emergency stop will not automatically reset

these units. To return to the previous operation status, they must be manually turned back on.

2. When the ON/OFF signal is selected, the status will change from OFF to ON when the external

input signal contact changes from OFF to ON, and will change from ON to OFF when the contact

changes from ON to OFF.

(B) For pulse signal

1. Even if the ON signal is input during ON, the status will remain ON.

2. If the local remote controller is prohibited, the ON/OFF operation mode and temperature setting

operations by the local remote controller will be prohibited.

3. Set the pulse width (contact ON time) to 0.5 to 1 sec.

4-2. External output function

(1) The function of external output

●The “ON” signal is output when one or more air conditioner are in the ON operation.

●The “Malfunction” signal is output when one or more air conditioner malfunctions.

(2) External output specifications

1. “ON” signal and “Malfunction”

signal will both be shown.

CN2 Lead wire Description of each terminal

No. 1 Green Common (External ground)

No. 2 Black ON/OFF

No. 3 Brown Malfunction/normal

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