commercial air conditioning solutions - miraco.com.eg · page 3 of 23 3. installation of smart link...

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Commercial Air Conditioning Solutions

2019 / 2020

Smart Link

LCD Wired Controller

Air Cooled

50UB Vertical Packaged Systems

40AB / 38BB Split Systems

INSTALLATION & OPERATION MANUAL

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1. Description, Application and Features of Smart Link LCD Wired Controller

1.1 Description

LCD Smart link wired controller is a sequential controller suitable to be used for Air cooled split

and vertical packaged commercial systems for both cooling only and cooling with electric heaters

models

1.2 Application：

➢ Compressor system (Selectable) : 1 – 2 individual circuits ( stages )

➢ Electric heater (Selectable) : 2 stages with enable / disable selection.

➢ RS-485 port (For Modbus BMS control)

1.3 Features

➢ Operation Mode Selection Cool – Heat – Fan Only – Dry

➢ Indoor Blower Speed Selection : Single Speed

➢ Key Lock function

➢ Temperature setting 16 ~ 30 °C

➢ Time & Date Setting : Days, AM, PM

➢ Timer ON / OFF

➢ Auto restart function with backup memory.

When the power failure is happened during the air conditioner operation, the microprocessor of

the printed circuit board will memorize the operation setting. After the power is recovered, the

air conditioner operates automatically ( without remote control after elapse of compressor time

delay ), according to the previous operation settings.

➢ Various Temperature Readings Display

➢ Self Diagnostic Error Code Display

➢ Heater & Compressor Operation Status Display

➢ Sequential control and balance loading (with up to 2 compressors) for sizes 110-145-190-250-300

➢ Display and show compressors operation loading sequence.

➢ Can be connected to Building Management System BMS ( Modbus Protocol ) through RS-485

connection port ( From the main PCB ).

1.4 All control parameters are preset with default value and protected with password to prevent

unauthorized access.

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2. Dimensions of Smart Link LCD Wired Controller

Dimensions (mm)

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3. Installation of Smart Link LCD Wired Controller

SAFETY PRECAUTION

• Read the safety precautions carefully before installing the wired controller.

• Stated below are important safety issues that must be obeyed.

• Confirm there is no abnormal phenomena during test operation after complete the installation.

• Meaning of marks :

WARNING Means improper handling may lead to personal death or severe injury.

CAUTION Means improper handling may lead to personal injury or property loss.

WARNING

• Please entrust the distributor or professionals to install the wired controller. Installation by other persons may lead to imperfect installation, electric shock or fire.

• Reinstallation must be performed by professionals.

• Improper installation may lead to electric shock or fire.

• A random installation may cause abnormal operation, electric shock or fire.

CAUTION

• Do not install the wired controller in a place vulnerable to leakage of flammable gases.

• Only use standard cabels provided with the unit to connect the sensors ( for split units ) and wired control.

OTHER PRECAUTIONS FOR WIRED CONTROLLER

Installation Location :

Do not install the wired controller in a place with much oil, steam, sulfide gas. Otherwise, the product may deform and fail.

Notes to installation of wired controller :

1. Circuit of Wired Controller is low voltage circuit. Never connect it with a standard 220V/380V circuit or put it into a same Wiring Tube with the circuit.

2. The connective cable of wired controller should not be longer than 30 meters.

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4. Accessories

Standard Accessories Supplied from The Factory

DESCREPTION QTY SHAPE USE

Wired Room Controller 1

To operate the air conditioner used with indoor unit

Cable connections of Wired Room Controller

1

4-core Shield Cable with 7.5 meters to connect the wired control to PCB

1

4-core Shield Cable with 30 meters to connect the wired control to PCB

Connections Cables for Sensors ( supplied with evaporator unit )

▪ Used only with Split Systems ▪ Field connection ▪ To connect the sensors in indoor

unit with PCB in outdoor unit. ▪ This cable 30 meters long.

For Sizes 55K – 90K 3

For Sizes 110K – 145K –

190K – 250K – 300K 4

USB used with BMS connections

1

▪ Can be connected to BMS for complete control solutions.

▪ Field connection.

Instructions of Sensors Connection Cables :

Main PCB PCB Cable 1 Meter

Connection Cable 30 Meter

Sensor head in indoor unit

1 Meter

Group of sensor cable

The group of sensor cable : Sensor consist of 3 parts

- PCB cable : from the main PCB outdoor unit to the connection cable.

- Connection cable : This cable 30 meters, from the PCB cable to the sensor head.

- Sensor head

Note :

- The connection cables are field connections.

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5. Control Functions of Smart Link LCD Wired Controller

1. On/Off

Press button to On/Off the unit

2. Mode of operation

Press button to select mode of operation: Heating, Cooling, Fan only, Dehumidify

3. Indoor blower speed

Single speed for products mentioned in this manual.

Note : button

For other products ( not included in this manual, the button is used to change fan speed).

4. Key lock

4.1. Press and hold and buttons for 1 second to activate keylock

( Only button is effective during keylock )

4.2. To deactivate key lock, repeat step 4.1

5. Temperature setting

5.1. Press or button to select desired temperature

5.2. Ambient temperature will be shown when there is no input for 6s

5.3. Not applicable in fan only mode

6. Clock setting

6.1. To set day

6.1.1. Press button to select day (Day symbol blinks) SUN–MON–TUE–WED–THU–FRI–SAT

6.1.2. Press button to save (Auto save when there is no input for 6s)

6.2. To set time

6.2.1. Press button and then or button to select time

00:00 — 00:01……— 11:58 -- 11:59--AM — PM

6.2.2. Press button to exit without save

6.2.3. Press button to save and exit

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Control Functions of Smart Link LCD Wired Controller

7. Timer On/Off setting

7.1. Timer default OFF

7.2. Timer symbol light up when timer set to ON

7.3. To set timer, press button once, temperature display area shows ‘—1’ and timer symbol

blinks.

7.3.1. Within 3s, press button to enter timer setting interface

7.3.2. Timer symbol ON blinks, temperature display area shows

Px（x = 1 ~ 4 which represent timer set number, maximum 4 set in a day )

7.3.3. Press button to select timer set number (maximum 4 set in a day),

temperature display area shows P1 ~ P4

7.3.4. Interface automatically return to default page if there is no input within 3s

7.3.5. Press button to select timer day

SUN – MON – TUE – WED – THU – FRI – SAT

7.3.6. Press or button to select timer time

00:00—00:01……—11:58-- 11:59-- AM—PM

7.3.7. Press button to select timer On/Off status

7.3.8. Press button to exit without save

7.3.9. Press button to save and exist

7.3.10. Press and hold button for 1s to cancel current timer setting, clock area displays ‘-:--‘

7.3.11. Press and hold button for 3s to cancel all timer setting, day display area all lights up,

clock display area displays ’-:--‘

7.3.12. Timer setting will be saved and exit automatically if there is no input for 30s

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8. Check various temperature readings

8.1. Press and hold and button for 3 seconds to enter various temperature

readings page

8.2. Error code display area shows unit number; Temperature display area shows category; Clock

display area shows readings; No displays on all other area

8.3. Press or button to select unit

8.4. Press or button to select category

8.5. Press button to exit ( Auto exit when there is no input for 60 seconds )

8.6. Temperature display category

8.6.1 For Single Stage Cool / Two Stage Heat Split System or Vertical Packaged System

Sizes 55K – 90K

Category Temperature display

AI 1 Return air temperature

AI 2 Outdoor air temperature

AI 3 Supply air temperature

AI 4 #1 indoor coil temperature

8.6.2 For Two Stage Cool / Two Stage Heat Split System or Vertical Packaged System

Sizes 110K – 145K – 190K – 250K – 300K

Category Temperature display

AI 1 Return air temperature

AI 2 Outdoor air temperature

AI 3 Supply air temperature



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1. Limited operation time setting

9.1 Press button twice (Temperature display area shows ‘—2’, key lock symbol blinks),

and press button within 3 seconds to enter limited operation time setting

9.2 Clock display area shows ‘---‘ pending password entry

9.3 Interface automatically exit if no input within 3 seconds

9.4 Press or button to select password for first digit and press

button to confirm and proceed to second digit password entry

9.5 Password entry “ 2828 ” to enter limited operation time setting

9.6 Temperature display area shows parameter category and correspondence category value will be

shown at clock display area

9.7 H – High limited run time ; L – Low limited run time

9.8 Set range 0 – 99 hours

9.9 Press or button to select different parameter category

9.10 Press button or button to change and select parameter value

9.11 Press and hold button for 1 second to save and exit

9.12 Press and hold button for 1 second to exit without save

2. Error reset

Press and hold button for 3 seconds

3. Functional test

11.1 Press and hold button and button for 3 seconds within 1 minute upon

power on to test function on mainboard

11.2 Use for PCB testing only

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12 Error Code Display For 1 Stage Cool / 2 Stages Heat

• Error code display area symbol lights up and error code shows during system error

• All error codes ( if more than 1 ) will be showed one after another

• Press button to clear error ( for those with error rectified only )

• Error codes table reference

Error Description

Indication Reason

01 Phase Reversal / Loss Error Contact open : Compressor, electric heaters, indoor blower, outdoor blower stop Contact closed : System resumes after error repair

02 Indoor Blower Motor Error Contact open : Compressor, electric heaters, indoor blower, outdoor blower stop Contact closed : System resumes after error repair

03

04 Outdoor Blower Motor Error

Contact open : Corresponding system stops Contact closed : System resumes after error repair

07 Compressor High Pressure Protection / Compressor Overload Protection

High pressure protection ( Cool mode - Dehumidify mode “Dry” )

• Contact open for 1 second or more: Correspondence compressor stops, indoor blower continues to operate

• System resume after error cleared (Manual reset)

08 Compressor Low Pressure Protection

Low pressure protection ( Cool mode - Dehumidify mode “Dry” )

• Checking by-passed for the first 30 seconds after compressor started

• Contact open for 30 seconds or more : Correspondence compressor stops, indoor blower continues to operate.

• System resume after error cleared.

• For auto reset low pressure type, system resume after error clear ( automatic reset ) if 3 ( three ) low pressure errors occur in 2 hours, you have to reset manually from wired control.

• For manual reset low pressure type, you have to reset from the low pressure switch itself every error occurrence. For 3 ( three ) sequential occurrences in 2 hours wired controller need to be reset manually.

15 Electrical Heater Error

Electric heater failure ( Heat mode only )

• During error : All electric heaters stop

• System resume after error cleared ( Manual reset only )

• Indoor blower stops after 60 seconds

16 Return Air Temperature Sensor Error ( Open sensor or shorted sensor )

1. During cool and heat mode:

• Indoor blower continue to operate while compressor, electric heaters, and outdoor fan stop

• System resumes after error cleared 2. During fan only mode:

• Indoor blower continue to operate as normal

17 Outdoor Air Temperature Sensor Error ( Open sensor or shorted sensor )

During cool mode and dry mode

• No control over outdoor fan

18 Supply Air Temperature Sensor Error ( Open sensor or shorted sensor )


• No control over indoor coil anti-freeze using supply air temperature sensor ( Anti freeze in this circumstances will be controlled by indoor coil temperature sensor only)

19 Indoor Coil Temperature Sensor ( Open sensor or shorted sensor )

During cool mode and dry mode (3 minutes by-passed after compressor cut in):

• Correspondence compressor stops Not applicable during heat and fan only mode

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Indoor Coil Anti Freeze Protection 1. Excessive dirt on the indoor coil 2. Clogged air filters 3. Low ambient temperature operation

of cool mode.

Indoor coil anti freeze protection (Applicable only in cool mode)

• When Indoor coil temperature ≤ 0°C for 1 min and compressor started for at least 10 min

• Compressor stops and system report error

• Error automatically reset when indoor coil temperature ≥ 12°C for 1 min Anti-freeze (Control using supply air)

• When supply air temperature ≤ Tcpoff (Default 5°C) – compressor stop

• When supply air temperature ≥ (Tcpoff + Tdif) (Tdif default 5°C) for 1 min System resumes

29 Circuit Refrigerant Leak

Refrigerant leak protection

• Applicable only after compressor operated for 30 minutes

• System will enter refrigerant leak protection when : - During cool mode, indoor coil temperature > 24°C - During protection, indoor blower continue to operates, compressor and outdoor fan stop

• Error can only be reset manually

OFF DI1 Is Disconnected From COM 2

Notes :

• Outdoor air temperature sensor error, Supply air temperature sensor error & Coil temperature sensor errors appear during Cool & Dry modes only.

• When return air temperature sensor is dislocated, the reading is taken from the sensor of wired controller.

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13 Error Code Display For 2 Stages Cool / 2 Stages Heat

• Error code display area symbol lights up and error code shows during system error

• All error codes ( if more than 1 ) will be showed one after another

• Press button to clear error ( for those with error rectified only )

• Error codes table reference

Error Description

Indication Reason

01 Phase Reversal / Loss Error Contact open : Compressor, electric heaters, indoor blower, outdoor blower stop Contact closed : System resumes after error repair

02 Indoor Blower Motor Error Contact open : Compressor, electric heaters, indoor blower, outdoor blower stop Contact closed : System resumes after error repair

03

04 Outdoor Blower Motor Error

Contact open : Corresponding system stops Contact closed : System resumes after error repair

07 1st Compressor High Pressure Protection / Compressor Overload Protection

High pressure protection ( Cool mode - Dehumidify mode “Dry” )

• Contact open for 1 second or more: Correspondence compressor stops, indoor blower continues to operate

• System resume after error cleared (Manual reset) 09 2nd Compressor High Pressure Protection / Compressor Overload Protection

08 1st Compressor Low Pressure Protection

Low pressure protection ( Cool mode - Dehumidify mode “Dry” )

• Checking by-passed for the first 30 seconds after compressor started

• Contact open for 30 seconds or more : Correspondence compressor stops, indoor blower continues to operate.

• System resume after error cleared.

• For auto reset low pressure type, system resume after error clear ( automatic reset ) if 3 ( three ) low pressure errors occur in 2 hours, you have to reset manually from wired control.

• For manual reset low pressure type, you have to reset from the low pressure switch itself every error occurrence. For 3 ( three ) sequential occurrences in 2 hours wired controller need to be reset manually.

10 2nd Compressor Low Pressure Protection

15 Electrical Heater Error

Electric heater failure ( Heat mode only )

• During error : All electric heaters stop

• System resume after error cleared (Manual reset only)

• Indoor blower stops after 60 seconds

16 Return Air Temperature Sensor Error ( Open sensor or shorted sensor )

1. During cool and heat mode:

• Indoor blower continue to operate while compressor, electric heaters, and outdoor fan stop

• System resumes after error cleared 2. During fan only mode:

• Indoor blower continue to operate as normal

17 Outdoor Air Temperature Sensor Error ( Open sensor or shorted sensor )


• No control over outdoor fan

18 Supply Air Temperature Sensor Error ( Open sensor or shorted sensor )


• No control over indoor coil anti-freeze using supply air temperature sensor ( Anti freeze in this circumstances will be controlled by indoor coil temperature sensor only)

19 1st Indoor Coil Temperature Sensor ( Open sensor or shorted sensor )

During cool mode and dry mode (3 minutes by-passed after compressor cut in):

• Correspondence compressor stops Not applicable during heat and fan only mode 20

2nd Indoor Coil Temperature Sensor ( Open sensor or shorted sensor )

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1st Indoor Coil Anti Freeze Protection 1. Excessive dirt on the indoor coil 2. Clogged air filters 3. Low ambient temperature operation of

cool mode.

Indoor coil anti freeze protection ( Applicable only in cool mode )

• When Indoor coil temperature ≤ 0°C for 1 min and compressor started for at least 10 min

• Compressor stops and system report error

• Error automatically reset when indoor coil temperature ≥ 12°C for 1 min Anti-freeze (Control using supply air)

• When supply air temperature ≤ Tcpoff (Default 5°C) - All compressors stop

• When supply air temperature ≥ (Tcpoff + Tdif) (Tdif default 5°C) for 1 min System resumes

26

2nd Indoor Coil Anti Freeze Protection 1. Excessive dirt on the indoor coil 2. Clogged air filters 3. Low ambient temperature operation of

cool mode.

29 1st Circuit Refrigerant Leak

Refrigerant leak protection ( Individual circuit check )

• Applicable only after compressor operated for 30 minutes

• System will enter refrigerant leak protection when : - During cool mode, indoor coil temperature > 24°C - During protection, indoor blower continue to operates, compressor and outdoor fan stop

• Error can only be reset manually 30 2nd Circuit Refrigerant Leak

OFF DI1 Is Disconnected From COM 2

Notes : • Outdoor air temperature sensor error, Supply air temperature sensor error & Coil temperature sensor errors appear during Cool & Dry modes only.

• When return air temperature sensor is dislocated, the reading is taken from the sensor of wired controller.

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14 Control Algorithms

IO Definitions :-

Input Function Type Remarks

DI1 Remote On/Off (External interlock) Open/Close

Close: Unit on

Open: Unit off

DI2 Phase protection Normally closed 1s verification

DI3 Indoor blower protection Normally closed 1s verification

DI4 Outdoor blower protection Normally closed 3s verification

DI8 #1 compressor high pressure protection Normally closed 1s verification

DI9 #1 compressor low pressure protection Normally closed 30s verification

DI10 #2 compressor high pressure protection Normally closed 1s verification

DI11 #2 compressor low pressure protection Normally closed 30s verification

DI16 Heater protection Normally closed 1s verification

Input Function Type Remarks

AI1 Return air temperature sensor Analogue NTC -

AI2 Outdoor ambient air temperature sensor Analogue NTC -

AI3 Supply air temperature sensor Analogue NTC -

AI4 #1 indoor coil temperature sensor Analogue NTC Functionality

interlock with

correspondence

compressor AI5 #2 indoor coil temperature sensor Analogue NTC

Output Function Type Remarks

DO1 #1 Compressor Normally open AC220V

DO2 #2 Compressor Normally open AC220V

DO5 Outdoor blower motor Normally open AC220V

DO9 #1 Electric heater Normally open AC220V

DO10A #2 Electric heater Normally open AC220V

DO11A Single speed blower motor Normally open AC220V

DO12A—DO12B General alarm - Dry contact

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Control Algorithms

Algorithms:-

1. Control target: Return air temperature

a. To control compressor and electric heater loading/unloading

b. Default set temperature: 24C

c. Temperature set range: 16 ~ 30C

Compressor sequence Cool mode Heat mode

Cut in zone T > Ts+1.5C T < Ts-1.5C

Loading zone T > Ts+1C T < Ts-1C

Status quo Ts+1C ≥ T ≥ Ts-1C Ts-1C ≤ T ≤ Ts+1C

Unloading zone T < Ts-1C T > Ts+1C

Cut out zone T < Ts-1.5C T > Ts+1.5C

Emergency stop zone T < Ts-2C T > Ts+2C

Remarks: T - Return air temperature

Ts - Set temperature

2. Compressor

a. Compressor operates in cool mode, dry mode only

b.Compressor stops during error:

i. High pressure protection

ii. Low pressure protection,

iii. Phase protection

iv. Indoor blower error

v. Correspondence return air temperature sensor error

c. Compressor starts according to loading cycle

d.Compressor stops according to unloading cycle

e. Compressor balance loading sequence apply

f. Dehumidify mode algorithm similar to cooling mode compressor loading/unloading algorithm

but with compressor operates for 10mins every 5mins interval

3. Compressor/Electric heater anti-short cycle duration

a. Compressor start to subsequent start minimum duration : Default 300 seconds

b.Compressor anti-short cycle duration : 180 seconds

c. Electric heater anti short-cycle duration : 60 seconds

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Control Algorithms

4. Indoor blower (Selectable single speed)

a. System On: Indoor blower starts

b. Compressor/Electric heater only allow to start after 15 seconds

c. Cool mode: Indoor blower continues to operate

d. Heat mode ( For Cool / Electrical Heat models ) :

Indoor blower stops (selectable through wired controller ) 60 seconds after all electric

heaters stopped

5. Electric heater ( For Cool / Electrical Heat models ) :

e. Electric heater operates only in heat mode

f. Electric heater stops during error:

i. Correspondence electric heater error

ii. Phase failure

iii. Indoor blower error

g. Electric heater starts according to loading cycle

h. Electric heater stops according to unloading cycle

i. Electric heater balance loading sequence apply

6. Outdoor Blower

a. Outdoor blower starts 2 seconds before compressor cut in

b. Outdoor blower stops simultaneously with compressor

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Control Algorithms

7. General alarm relay output

Relay closes during error

8. Cool mode On/Off sequence

No Cool mode ON cycle Remarks

1 System On

2 Remote On/Off (External interlock) contact

closed Phase protection contact closed Contact open: System standby

3 Indoor blower starts

15s delay

Indoor blower error: Indoor blower

stops, system standby

4 Check return air temperature

5 Compressor cut in Compressor balance loading criteria apply

6 Check loading cycle

7 On cycle ends

No Cool mode OFF cycle Remarks

1 System Off

2 Remote On/Off (External interlock) contact open

3 Stop compressor #1

4 3 seconds delay


6 Outdoor blower stops

7 15 seconds delay

8 Indoor blower stops

9 Off cycle ends

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Control Algorithms

Dry mode On/Off sequence

No Dry mode ON cycle Remarks

1 System On

2 Remote On/Off (External interlock) contact closed Phase protection contact closed

Contact open: System standby

3 Indoor blower starts 15s delay Indoor blower error: Indoor blower stops, system standby


5 Run compressor #2

6 30 sec delay

7 Run compressor #1

8 System Run for 9.5 min


10 30 sec delay


12 System Stop for 4.5 min

13 Repeat Run and Stop Interval, from step 5 to 12

No Dry mode OFF cycle Remarks

1 System Off



4 3 seconds delay


6 Outdoor blower stops

7 15 seconds delay


9 Off cycle ends

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Control Algorithms

1. Heat mode On/Off sequence

Applicable to cooling only model

No Heat mode (Cool / Electrical Heat) ON cycle Remarks

1 System On

2 Remote On/Off (External interlock) contact


3 Indoor blower starts 15 seconds delay Indoor blower error: Indoor blower stops,

system standby


5 Electric heater cut in Electric heater balance loading criteria apply

6 Check loading cycle

7 On cycle ends

No Heat mode (Cool / Electrical Heat) OFF cycle Remarks

1 System Off


3 Stop electric heater #1

4 3 seconds delay

5 Stop electric heater #2

6 60 seconds delay


8 Off cycle ends

2. Fan mode On/Off sequence

No Fan mode ON cycle Remarks

1 System On

2

Remote On/Off (External interlock) contact


3 Indoor blower starts Indoor blower error: Indoor blower

stops, system standby

4 On cycle ends

No Fan mode OFF cycle Remark

s 1 System Off



4 Off cycle ends

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15 SENSOR SPECIFICATIONS

R-T CONVERTION TABLE

R25 = 10kΩ ± 1% B25/50 = 3450 ±1% Connector type: XH-2Y

T Rmin Rnom Rmax T Rmin Rnom Rmax

(℃) (kΩ) (kΩ) (kΩ) (℃) (kΩ) (kΩ) (kΩ)

-40 220.8 230.4 240.3 -10 44.2 45.32 46.47

-39 208 216.9 226.1 -9 42.13 43.19 44.26

-38 196 204.2 212.8 -8 40.18 41.16 42.17

-37 184.8 192.5 200.4 -7 38.33 39.25 40.19

-36 174.3 181.4 188.7 -6 36.58 37.44 38.31

-35 164.5 171.1 177.9 -5 34.92 35.72 36.54

-34 155.3 161.4 167.8 -4 33.34 34.09 34.86

-33 146.7 152.4 158.3 -3 31.85 32.55 33.26

-32 138.6 143.9 149.4 -2 30.43 31.09 31.75

-31 131.1 136 141.1 -1 29.08 29.7 30.32

-30 124 128.6 133.2 0 27.8 28.38 28.96

-29 117.3 121.6 125.9 1 26.59 27.13 27.68

-28 111.1 115 119.1 2 25.44 25.94 26.45

-27 105.2 108.9 112.6 3 24.34 24.81 25.29

-26 99.62 103.1 106.6 4 23.3 23.74 24.19

-25 94.41 97.62 100.9 5 22.31 22.72 23.14

-24 89.52 92.52 95.58 6 21.37 21.75 22.14

-23 84.91 87.7 90.56 7 20.47 20.83 21.19

-22 80.57 83.17 85.84 8 19.62 19.95 20.29

-21 76.48 78.91 81.39 9 18.81 19.12 19.44

-20 72.63 74.89 77.21 10 18.03 18.32 18.62

-19 68.99 71.11 73.24 11 17.29 17.57 17.84

-18 65.56 67.54 69.53 12 16.59 16.85 17.1

-17 62.32 64.17 66.03 13 15.92 16.16 16.4

-16 59.27 61 62.73 14 15.28 15.5 15.73

-15 56.38 58 59.62 15 14.67 14.88 15.09

-14 53.69 55.17 56.68 16 14.09 14.28 14.48

-13 51.12 52.5 53.91 17 13.53 13.71 13.9

-12 48.68 49.97 51.29 18 13 13.17 13.34

-11 46.38 47.58 48.81 19 12.5 12.65 12.81

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SENSOR SPECIFICATIONS

R-T CONVERTION TABLE

R25 = 10kΩ ± 1% B25/50 = 3450 ±1% Connector type: XH-2Y

T Rmin Rnom Rmax T Rmin Rnom Rmax

(℃) (kΩ) (kΩ) (kΩ) (℃) (kΩ) (kΩ) (kΩ)

20 12.01 12.16 12.31 50 4.008 4.085 4.163

21 11.55 11.69 11.82 51 3.876 3.952 4.028

22 11.11 11.24 11.36 52 3.749 3.823 3.899

23 10.69 10.81 10.92 53 3.627 3.7 3.774

24 10.29 10.39 10.5 54 3.509 3.581 3.654

25 9.9 10 10.1 55 3.396 3.467 3.539

26 9.523 9.623 9.723 56 3.287 3.356 3.427

27 9.163 9.263 9.363 57 3.182 3.25 3.32

28 8.819 8.918 9.018 58 3.081 3.148 3.216

29 8.489 8.588 8.687 59 2.983 3.05 3.117

30 8.174 8.272 8.371 60 2.89 2.955 3.021

31 7.872 7.97 8.068 61 2.799 2.863 2.928

32 7.583 7.68 7.777 62 2.712 2.775 2.839

33 7.306 7.402 7.499 63 2.628 2.69 2.753

34 7.041 7.136 7.232 64 2.547 2.608 2.67

35 6.787 6.881 6.976 65 2.469 2.529 2.589

36 6.543 6.637 6.731 66 2.394 2.452 2.512

37 6.31 6.402 6.495 67 2.321 2.379 2.437

38 6.086 6.177 6.269 68 2.251 2.308 2.365

39 5.871 5.961 6.052 69 2.184 2.239 2.296

40 5.665 5.754 5.844 70 2.119 2.173 2.228

41 5.468 5.556 5.644 71 2.056 2.109 2.163

42 5.278 5.365 5.452 72 1.995 2.047 2.101

43 5.096 5.182 5.268 73 1.936 1.988 2.04

44 4.921 5.006 5.091 74 1.879 1.93 1.982

45 4.754 4.837 4.921 75 1.825 1.874 1.925

46 4.592 4.674 4.757 76 1.772 1.821 1.87

47 4.437 4.518 4.6 77 1.721 1.769 1.817

48 4.289 4.368 4.448 78 1.671 1.718 1.766

49 4.146 4.224 4.303 79 1.624 1.67 1.717

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16 BMS Connection

Schematic diagram

Example for BMS connection

• If you have 3 units, and you want to connect them together with a BMS system.

• First you must set a number for every unit as shown in previous diagram by following

below steps:

1. Press twice (Temperature display area shows ‘—2’, key lock symbol blinks),

press within 3s to enter parameters setting interface.

2. Clock display area shows ‘---‘ pending password entry Press or to select password for

first digit and press to confirm and proceed to second digit.

3. Pass 8699.

4. Temperature display area shows parameter category and correspondence category value will

be shown at clock display area.

5. Press or to select different parameter category.

6. Go to parameter 17.

7. Press or to change and select parameter value.

8. you can set unit number from 0 to 199, default 0.

9. Press and hold for 1s to save and exit.

A1,B1 A1,B1 A1,B1

Unit No.1 Unit No.2 Unit No.3

Data logger RS232-RS485

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17 NETWORKING (BUILDING AUTOMATION SYSTEM)

Topology

LCD Wallpad

PCB

LCD Wallpad

PCB

LCD Wallpad

PCB

LCD Wallpad

PCB

Data Logger No:01

No:01 No:02 No:03 No:32

LCD Wallpad

PCB

LCD Wallpad

PCB

LCD Wallpad

PCB

LCD Wallpad

PCB

Data Logger No:02

No:01 No:02 No:03 No:32

LCD Wallpad

PCB

LCD Wallpad

PCB

LCD Wallpad

PCB

LCD Wallpad

PCB

Data Logger No:03

No:01 No:02 No:03 No:32

LCD Wallpad

PCB

LCD Wallpad

PCB

LCD Wallpad

PCB

LCD Wallpad

PCB

RS232-RS485 Converter

No:32

No:01 No:02 No:03 No:32

Computer

Data Logger

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NETWORKING (BUILDING AUTOMATION SYSTEM)

General Modbus protocol

System Setup

Connection port ：RS-485

Communication way ：Half duplex

Communication format ：Asynchronous Serial Communication

：1 start bit, 8 data bits, 1 stop bit

Baud rate ：9600bps

Communication method ：Master-slave (PC or master controller as Master, others as Slave)

BUS standard ：MODBUS protocol, RTU (Remote Terminal Unit) mode

Error checking ：CRC-16

Function Code Description Definition

01 (0x01)

Read Coils This function code is used to read from 1 to 2000 contiguous

status of coils in a remote device.

02 (0x02) Read Discrete Inputs This function code is used to read from 1 to 2000 contiguous

status of discrete inputs in a remote device.

03 (0x03)

Read Holding Registers This function code is used to read the contents of a contiguous

block of holding registers in a remote device.

04 (0x04)

Read Input Registers This function code is used to read from 1 to approx. 125

contiguous input registers in a remote device.

05 (0x05) Write Single Coil This function code is used to write a single output to either ON or

OFF in a remote device.

06 (0x06)

Write Single Register This function code is used to write a single holding register in a

remote device

15 (0x0F)

Write Multiple Coils

This function code is used to force each coil in a sequence of

coils to either ON or OFF in a

remote device.

16 (0x10)

Write Multiple registers

This function code is used to write a block of contiguous registers

(1 to approx. 120 registers)

in a remote device.

Error Code Description Definition

02 (0x02) Illegal Data Address The data address (register number) received in the query is not an

allowed address

04（0x04） Illegal Write Data The data written in the query is not valid

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Control point list

Address Description

1 On/Off unit

Apply air-cooled system

COIL(bit) 2 Reserved

3 Reserved Read 01 (0x01)

4 Reserved Write 05 (0x05)

5 Reserved Write 15 (0x0F) 6 Reserved

7 Reserved 8 Reserved

DISCRETE STATUS(bit)

Read 02 (0x02)

Address Air-cooled package Description

4000 #1 compressor

Read discrete inputs

0 – Not in operation

1 – In operation

4001 #2 compressor

4004 #1 electric heater

4005 #2 electric heater

4008 Reserved

4011 Reserved

4012 #1 outdoor blower

1 Power failure

2 Indoor blower error

3 #1 outdoor blower error

7 #1 High pressure error

8 #1 Low pressure error

9 #2 High pressure error

10 #2 Low pressure error

15 Electric heater error

16 Return air temp sensor error

17 Outdoor air temp sensor error

18 Supply air temp sensor error

19 #1 Indoor coil temp sensor error

20 #2 Indoor coil temp sensor error

23 Reserved

24 Reserved

25 #1 Indoor coil anti-freeze protection

26 #2 Indoor coil anti-freeze protection

29 #1 Refrigerant leak protection

30 #2 Refrigerant leak protection

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INPUT REGISTER

Read 04 (0x04)

Address Descriptions

1 Software code: 0x0001

2

System model code 1：-

Water-cooled package：0x00a0

Air-cooled package ：0x0080 (Cooling model)

：0x0081 (Heat pump model)

3

System model code 2:-

D00 : 1-With electric heater

D01 : 1-With fresh air

D02 : 1-With domestic hot water

D03 : 1-Heat only model

D04 to D15 : Reserved

Address Air-cooled package Descriptions

100 Return air temperature Read Input

Registers

（Show value =

Actual value*10）

101 Outdoor air temperature

102 Supply air temperature

103 #1 Indoor coil temperature

104 #2 Indoor coil temperature

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Address Descriptions

1 Set temperature (Air conditioning)

2 Reserved

3

Mode of operation :

1 - Cooling

2 - Fan only

4 - Dehumidification

8 - Heating

16 - Auto

HOLDING

4

Indoor blower speed :

1 - Low speed

2 - Medium speed

4 - High speed

8 - Auto

5 Reserved REGISTER

6 Reserved Read 03 (0x03) Write 06 (0x06)

Write 16 (0x10) Address Air-cooled package Descriptions

2000 Return air temperature correction

Temperature

correction

range

(-5℃ to 5℃)

Lock features

is applicable

only when

use with

LCD Wired Controller

type-T1

2001 Outdoor air temperature correction

2002 Supply air temperature correction

2003 #1 Indoor coil temp correction

2004 #2 Indoor coil temp correction

2011 System On/Off lock

2012 Mode of operation lock

2013 Set temperature lock

2014 Indoor blower speed lock

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18 Important Warning

Warning ( 1 ) : Please don’t change the arrangement of the Dip Switch as it is a factory setting to avoid losing warranty of the commercial system.

( :1تحذير )الخاصة بالوحده من فضلك ال تقم بأى تغيير فى مفاتيح الضبط

جهاز التكييف المركزيحفاظا على استمرار ضمان االلكترونيه

Warning ( 2 ) : Please don’t connect power supply or any kind of voltage source between the 2 points (DO12B - DO12A) to avoid damaging of the PCB and losing warranty of the commercial system.

( :2تحذير ) النقطتين من فضلك ال تقم بتوصيل مصدر كهربى إلى

( DO12B - DO12A ) حفاظا لتجنب تلف الوحدة االلكترونية و جهاز التكييف المركزيعلى استمرار ضمان

Warning ( 3 ) : Please don’t remove the wax from the dip switch to avoid losing warranty of the commercial system.

( :3تحذير )الضبط الخاصه بالوحده زاله الشمع من على مفاتيحإمن فضلك ال تقم ب

جهاز التكييف المركزي حفاظا على استمرار ضمان االلكترونيه

Warning ( 4 ) : Please follow the numbering in the cables of sensors while connecting cables parts. Hint: ( in split package systems )

( :4تحذير )الترقيم الموجود على السينسورات إتبعمن فضلك عند توصيل أسالك األسالك للتوصيل بشكل صحيح

( فقط فى حالة جهاز التكييف المركزي المنفصل) : توضيح

Main PCB

Warning (4)

(4تحذير )

Warning (2)

(2تحذير )

Warning (3)

(3تحذير )

Warning (1)

(1تحذير )

To BMS USB

فى حالة جهاز التكيف

المركزي المنفصل

أرقامالتحذيرات اتبع

فقط ( 4( و ) 2)

For split system units please follow warnings No. ( 2 ) and ( 4 ) only

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January 2020 Carrier is committed for continuous improvement of Carrier products according to national and international standards to ensure the highest quality and reliability standards, and to meet market regulations and requirements.

All specifications subject to change without prior notice according to Carrier policy of continuous development.

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http://www.miraco.com.eg/

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