LG PRCKD40E, PRCKD20E User Manual

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AHU CONTROL KIT

Owner's Manual

IMPORTANT

• Please read this installation manual completely before installing the product.

• Installation work must be performed in accordance with the national wiring standards by authorized personnel only.

• Please retain this installation manual for future reference after reading it thoroughly.

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Models: PRCKD20E

PRCKD40E

ENGLISH ITALIANO ESPAÑOL FRANÇAIS

PORTUGUESE

2 AHU CONTROL KIT

AHU CONTROL KIT Owner's Manual

TABLE OF CONTENTS

■ Safety Precautions...............................................................3

■ Necessary sensor by operating mode ................................6

■ Part Description ...................................................................7

■ Basic operation of wired remote controller..........................8

■ Main function of wired remote controller.............................9

■ Supplementary function of wired remote controller..........11

■ Humidifier........................................................................................11

■ Desired humidity control .................................................................12

■ Auto ventilaton ................................................................................13

■ Desired CO

2 level control ................................................................14

■ Reservation function of wired remote controller ...............15

■ Changing Current Time .................................................................15

■ Programming : Setting Simple Reservation..................................17

■ Programming : Setting ON Reservation........................................18

■ Programming : Setting OFF Reservation......................................19

■ Programming : Weekly Reservation..............................................20

■ Programming : Holiday Reservation..............................................22

■ Setting function of wired remote controller installation .....23

■ How to start installation setting mode ...........................................23

■ Setting function by code ................................................................24

■ Central control address setting......................................................25

■ Damper opening setting ................................................................26

■ Remote control Master/Slave setting ............................................28

■ Manual operating mode.....................................................29

■ SA fan operation ............................................................................29

■ RA fan operation............................................................................29

■ Check before requesting for service .................................30

■ Test run ..............................................................................31

■ Self diagnosis function...................................................................31

Safety Precautions

Owner's Manual 3

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■ Installation

Safety Precautions

To prevent injury to the user or other people and property damage, the following instructions must be followed.

■ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications.

■ Meanings of symbols used in this manual are as shown below.

This symbol indicates the possibility of death or serious injury.

This symbol indicates the possibility of injury or damage.

Be sure not to do.

Be sure to follow the instruction.

WARNING

Always ground the product.

• If the product is not grounded properly, it can cause an electric shock.

When installing the product, always install the electric circuit breaker and the exclusive switch.

• If they are not installed, it can cause a fire or an electric shock.

Do not use damaged circuit breaker or exclusive switch.

• It can cause a fire or an electric shock.

Do not store or use flammable gas or volatile substance near the air conditioner.

• It can cause a fire or problem to the product.

Do not bend or damage the power cable.

• It can cause a fire or an electric shock.

For the electric construction, request for service to the distributor or the service center.

•

Arbitrary disassembly or repair can cause a fire or an electric shock.

System air conditioner can only be installed by specialized service provider with air condition installation certifications.

• Inappropriate installation can cause leakage, fire and electric shock.

When moving or reinstalling the air conditioner, please contact the

MULTI VTM AHU

installation service provider.

• Inappropriate installation can cause leakage, fire and electric shock.

Do not disassemble, repair or reconfigure the product arbitrarily.

• It can cause a fire and electric shock.

WARNING

CAUTION

Safety Precautions

4 AHU CONTROL KIT

The electric construction must be performed by an electrician for electric installation based on the installation manual and designated circuit diagram.

• Use of inappropriate wire and electric construction, can result in an electric shock or a fire. Technical standard for electric equipment

Use designated installation material at the designated location for the product installation.

Do not install the product outdoors.

When opening the box or installing the product, be careful of any sharp objects.

• It can cause an injury.

Use the fuse of rated capacity.

• It can cause a fire or an electric shock.

For the product installation, request for service to the service center or the installation service provider.

•

It can cause a fire , an electric shock, an explosion or an injury.

■ Operation

Do not let water get inside (Controller) the product. Especially do not wash the product with water.

• It can cause an electric shock or a problem to the product.

Do not leave the product near a heating device.

• It can cause a fire.

Do not change or expend the power cord arbitrarily.

• It can cause a fire or an electric shock.

Use exclusive cable for the product.

• It can cause a fire or an electric shock.

If you hear or smell a weird sound or odor, or if you see smoke from the product or if you experience a power outage, pull down the main power switch.

• If not, it can cause a fire or an electric shock.

Do not put any heavy objects on top of the power cable.

• It can cause a fire or an electric shock.

Do not let the work or the user get on top of the product.

• He or she can fall over to get injured.

Do not use any heating devices near the power cable.

• It can cause a fire or an electric shock.

Do not turn off the power with the main power switch while the product is operating.

• It can cause a fire or an electric shock.

Do not operate the switch with wet hands.

• It can cause a fire or an electric shock.

If you are not planning to use the product for a long period of time, pull down the main power switch.

• It can cause a fire or an electric shock.

If the gas leaks, open the window to ventilate the room before operating the product.

• It can cause an explosion or a fire.

Safety Precautions

Owner's Manual 5

ENGLISH

When installing the product, make sure to level the product.

• It can cause vibration or leakage.

Do not install the product at a location where flammable gas is leaking.

• It can cause a fire or a problem to the product.

Do not carry the product by yourself.

• You can get injured by doing so.

■ Operation

CAUTION

Do not put containers with water on top of the product.

• If the water spills over, it can cause a fire or an electric shock.

6 AHU CONTROL KIT

Necessary sensor by operating mode

Operating mode Necessary sensor Function

SA temperature sensor RA temperature sensor

- This runs indoor air conditioning.

Initial external air inlet setting is 30% of the air supply during the air conditioning and this can be changed by the user. But, when the damper actuator is installed on AHU, the setting can be changed.

- This runs the indoor heating.

Initial external air inlet setting is 30% of the air supply during the heating and this can be changed by the user. But, when the damper actuator is installed on AHU, the setting can be changed.

This is the operating function to run indoor air conditioning by controlling multiple outdoor units by comparing the enthalpy of the indoor/outdoor air.

During the power save operation, the operation switches between partial air conditioning operation (Controlling multiple outdoor units) and external air conditioning operation (Outdoor unit OFF, 100% external air flow).

This is operating function is mainly used in between seasons. But if there is no OA temperature/humidity sensor and RA temperature/humidity sensor on the AHU, the power save operation cannot be selected.

This is the operating function to remove the indoor humidity when the humidity level indoor is excessive.

During the dehumidifier operation, the set value is 50%RH and the user cannot change this setting. But if there is no OA temperature/humidity sensor and RA temperature/humidity sensor on the AHU, the dehumidifier operation cannot be selected.

This is the operating function to control the humidity to the set value by detecting the indoor humidity level.

- This can be selected during heating operation. But if there is no humidifier/humidifying valve and RA temperature/humidity sensor on the AHU, the humidifier operation cannot be selected.

- When the mixing temperature during the heating operation is below the set value (5°C), preheating device automatically operates. The preheating device and mixing temperature sensor must be installed on AHU for this to operate automatically.

This is the operating function to control the amount of external air flow so that the CO2 level is controlled within the set level by detecting the indoor CO2 level.

- The initial CO2 level is set to 1000ppm, and can be changed by the user.

This function operates when auto ventilator (Additional operation) is selected during air conditioning or heating operation. But if there is no CO2 sensor and damper actuator on the AHU, the auto ventilator operation cannot be selected.

SA temperature sensor RA temperature sensor

Mixing temperature/

humidity sensor

SA temperature sensor RA temperature sensor

2 sensor

Damper actuator

SA temperature sensor RA temperature sensor

OA temperature/

humidity sensor

SA temperature sensor RA temperature sensor

OA temperature/

humidity sensor

Damper actuator

Air conditioning

Heating

Power save

Dehumidify

Humidification

Auto ventilation

Preheating

Necessary sensor by operating mode

Owner's Manual 7

ENGLISH

Part Description

Name and Function of Remote Contr

oller

OPERATION INDICATION SCREEN

SET TEMPERATURE Button WIRELESS REMOTE

CONTROLLER RECEIVER

• Some products don't receive the wireless signals.

VENTILATION Button OPERATION MODE SELECTION

Button SUBFUNCTION Button FUNCTION SETTING Button EXIT Button ON/ OFF Button ROOM TEMPERATURE Button RESET Button FAN SPEED Button AIR FLOW Button RESERVATION/ TIME SETTING

Button SETTING/ CANCEL Button UP, DOWN, LEFT, RIGHT Button

Please attach the inform label inside of the door. Please choose proper language defend on your country.

4 5

6 7 8

9 10 11

12 13 14

15 16

• 3/4/12/13 does not work.

• 6 Additional operation button depends on the application of the sensor.

8 AHU CONTROL KIT

Basic operation of wired remote controller

Press the Run/Stop button on the control part of the remote controller to start the operation.

Press the Operation Selection button to set the operating mode (Heating/Cooling etc.).

Press the Temperature Control button to set the desired temperature below the indoor temperature. (Based on air conditioning operation)

When you press the Run/Stop button during use, the operation will stop.

(Example) Remote controller display window

▲ Indoor

temperature

▲ Desired

temperature

During the initial operation, the desired temperature is automatically set below the indoor temperature.

Basic operation of wired remote controller

Main function of wired remote controller

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Every time you press the Run/Stop button, the ON and OFF will be repeated.

Every time you press the Operation Selection button, it will change in the order of Air

Conditioner →Dehumidifier →Heater → Power Save →Fan.

There are operating modes that cannot be set depending on the applied sensor.

<Fan>

Main function of wired remote controller

10 AHU CONTROL KIT

Every time you press the Temperature Control button and the Up/Down button, the desired temperature will change. Air Conditioner/Power Save: 18~30°C / Heater: 16~30°C Dehumidifier/Fan: Desired temperature cannot be changed

When you press the Indoor Temperature button, the Return Temperature of AHU will be displayed for about 5 seconds.

To check the current humidity, press the ‘Left’ button when the indoor temperature is displayed and the indoor humidity will be displayed at Display ‘C’. To check the current CO2 level, press the ‘Right’ button when the indoor temperature is displayed and the current CO2 level will be displayed at Display ‘C’.

Current humidity / CO2 level

(Function set by code) * Code 01: Current humidity * Code 02: Current CO

2 level

: Current humidity

: Current CO

2 level

Function

Code

Setting

(Example)

Owner's Manual 11

ENGLISH

Supplementary function of wired remote controller

* Humidifier can only be set during heating

operation.

* Humidifier operation can only be used when the

humidifier is installed.

* The humidifier operation is controlled by the

desired temperature set.

Supplementary function of wired remote controller

Humidifier

Press the Additional Operation

button.

When the Humidifier icon

flashes in Display ‘B’, press the Set/Cancel button to start the humidifier.

When you press the OK/CLEAR

button one more time, the humidifier will stop.

12 AHU CONTROL KIT

Supplementary function of wired remote controller

Desired humidity control

* Desired humidity can be controlled in the range

of 40~60% by 5% increment.

* Default humidity is set to 50%.

Press the Function Setting

button.

Set the Function Code of

Display ‘C’ to 01.

Press the Up/Down button to set

the target humidity.

Press the OK/CLEAR button to

decide the desired humidity.

Display C: Desired humidity

Function

Code

(Function set by code) * Code 01: Current humidity

: Desired humidity

(Example)

Setting

Owner's Manual 13

ENGLISH

Supplementary function of wired remote controller

Auto ventilaton

* Auto Ventilator function can only be set during

the Air Conditioning/Heating operation.

Press the Additional Operation

button.

When the Auto icon flashes in

Display ‘A’, press the OK/CLEAR button to start the Auto Ventilator.

When you press the OK/CLEAR

button one more time, the Auto Ventilator will be canceled and return to the previous operating condition.

14 AHU CONTROL KIT

Supplementary function of wired remote controller

Desired CO2level control

* Desired CO2 level can be controlled in the range

of 500~1500ppm by 100ppm increment.

* Default humidity is set to 1000ppm.

Press the Additional Operation

button.

Set the Function Code of

Display ‘C’ to 02.

Press the Up/Down button to set

the target CO

Press the OK/CLEAR button to

set the target CO

2 level.

Display C: CO2 level

Function

Code

(Function set by code) * Code 02: Desired CO

: Desired CO

(Example)

Setting

2 level

Owner's Manual 15

ENGLISH

Reservation function of wired remote controller

Changing Current Time

Keep pressing button for 4

secs to enter Setting current time mode.

Ex) Changing Current Time as 'Monday / AM 10:20'.

Press key to adjust the current

day.

Press key to move to AM/ PM setting

mode (the 'AM/ PM segment will flash).

Setting AM/ PM value by

pressing button.

Press button to move to 'Hour'

setting mode. (the 'Hour' segment will flash)

Setting Hour value by pressing

button.

16 AHU CONTROL KIT

Reservation function of wired remote controller

Press button to move to 'Minute' setting mode. (the 'Minute' segment will flash)

Setting Minute value by pressing button.

Press button to finish.

In the process, press button to release and exit from setting mode. (In case of exit with incomplete information, it will return to the previous setting )

Owner's Manual 17

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Reservation function of wired remote controller

Programming : Setting Simple Reservation

In case of there is not any reservation setup on system, it is possible to make a SIMPLE reservation on indoor unit.

❊ If the indoor is ON, we can make the reservation for turning OFF. In reserve, if the indoor is OFF,

we can set the timer for turning ON. The reservation time is from 1 to 7 hours.

Press button to enter the

Programming mode. (the segment flashing)

Ex) Setting Simple Reservation time as '3'.

Press button to adjust

reservation time.

Press button to finish setting.

Adjusting the reservation time after finish

reservation setting will release the previous one.

18 AHU CONTROL KIT

Reservation function of wired remote controller

Programming : Setting ON Reservation

This function is able to turn air conditioner ON after a setting time.

Press button.

Ex) Setting ON Reservation Time as 'AM 10:20'.

Repeat pressing button to

enter the ON reservation setting mode. ( segment flashing)

Press button to adjust AM/ PM

setting.

Press button to Hour setting

mode. When the Hour icon flash, please setting time. The setting range is within 1~12.

Press button to shift to Minute

setting mode. When the Minute icon flash, please setting minute the setting range is within 00~59.

Press button to finish setting.

Owner's Manual 19

ENGLISH

Reservation function of wired remote controller

Programming : Setting OFF Reservation

This function is able to turn air conditioner OFF after a setting time.

Press button.

Ex) Setting OFF Reservation Time as 'AM 10:20'.

Repeat pressing button to

enter the OFF reservation setting mode. ( segment flashing)

Press button to adjust AM/ PM

setting.

Press button to shift to Hour

setting mode. When the Hour icon flash, please setting time. The setting range is within 1~12.

Press button to shift to Minute

setting mode. When the Minute icon flash, please setting minute the setting range is within 00~59.

Press button to finish setting.

20 AHU CONTROL KIT

Reservation function of wired remote controller

Programming : Weekly Reservation

The weekly reservation is active after setting current time

Press programming button to enter

the Programming mode. Repeat pressing button to select [Weekly reservation]. (The segment will be flashed)

Ex) Setting one action as below.

- Day : TUE

- ON Time : 11:30 AM

- OFF Time : 12:30 PM

Press left, right button to adjust the

current day.

Press up, down button to adjust the

action number.

Press right button to move to 'Hour'

Part on ON Time section. (The 'Hour' segment will be flashed)

Press up, down button to adjust the

Hour on Start Time section.

Press right button to move to

'Minute' Part on Start time section. (The 'Minute' segment will be flashed)

Start Time Section

Owner's Manual 21

ENGLISH

Reservation function of wired remote controller

Press up, down button to adjust the Minute on Start Time section.

Press right button to move to 'Hour' Part on OFF Time section. (The 'Hour' segment will be flashed)

Please refer the process from No.5 to No.7 for setting OFF Time. It is same method.

If you finish the setting, press setting/cancel button to complete programming. The under bar segment will be created, when it finished.

Please refer the process from No.2 to No.10 for setting other day weekly program. It is same method.

Press exit button to exit or system will automatically release without any input after 25 seconds.

Off Time Section

Description of weekly reservation

<Note>

Action

Start Time

Front

❋ Two actions per weekday can be programmed, in total 14 actions

Off Time

22 AHU CONTROL KIT

Reservation function of wired remote controller

Programming : Holiday Reservation

This function is to automatically stop the machine working on some days.

Press button to enter the

reservation setting mode.

Repeat pressing button to

enter the holiday reservation setting mode. ( segment flashing)

Press button to move to

holiday position.

Press button to set or

release a selected day as holiday or not. (❊ the holiday is indicated with a underline)

If there is any holiday from

Monday to Sunday, segment on LCD will be displayed.

Press the button to exit or if

there is not any input, system will release any setting after 10 seconds.

It is possible to set the air conditioner

OFF in every "holiday" ( ex. 9:00, 10:00, 13:00 )

Owner's Manual 23

ENGLISH

Setting function of wired remote controller installation

How to start installation setting mode

Setting function of wired remote controller installation

Press the Function Setting button for

more than 3 seconds and the Code will be displayed on Display ‘C’ to enter the installation mode.

When you now press the Function

Setting button, the function code will change.

Press the Up/Down button to change the

setting.

Press the Left/Right button to navigate

through the items.

Press the Set/Cancel button to complete

the setting.

24 AHU CONTROL KIT

Setting function of wired remote controller installation

Setting function by code

Code 10: Test run (AHU has no function)

Code 11: Central control address setting

Code 12: Damper opening setting

Code 13: Remote controller Master/Slave setting

Display C: Installation setting display

Function

Code

Setting1 Setting2

Setting function of wired remote controller installation

Owner's Manual 25

ENGLISH

Central control address setting

* This is the function to set the central control

address of AHU.

Enter the Installation Setting mode.

Press the Function Setting button

repeatedly to reach function code of ‘11’.

Press the Right button to

move to ‘Setting of 1’.

Press the Up/Down button

to set the central control address.

Flashes

Central control address

Press the Set/Cancel button

to complete the central control address setting.

Display C: Installation setting display

Function

Code

Setting1 Setting2

26 AHU CONTROL KIT

Setting function of wired remote controller installation

Damper opening setting

Enter the Installation Setting mode.

Repeatedly press the Function Setting

button to reach function code of ‘12’.

Press the Right button

to move to ‘Setting of 1’.

Press the Up/Down button to set the value.

‘Setting of 1’ for each mode is as follows. * Cooling mode [ ‘01’ (OA) /‘02’ (EA) / ‘03’ (Mixing)] * Heating mode [ ‘04’ (OA) / ‘05’ (EA) / ‘06’ (Mixing)] * Fan mode [ ‘07’ (OA) / ‘08’ (EA) / ‘09’ (Mixing)]

Cooling OA damper

Heating OA damper

Flashes

Fan OA damper

Display C: Installation setting display

Function

Code

Setting1

Setting2

Owner's Manual 27

ENGLISH

Setting function of wired remote controller installation

* This is the function to set the damper opening

of AHU.

* This applies only to the site where the damper

actuator is installed.

Press the Right button to move to

‘Setting of 2’ by each mode.

Flashes

Press the Up/Down button to select the

damper opening. The damper opening that can be set is in the range of 1~91 degrees.

Air conditioning external damper opening of 40°

Heating external damper opening of 40°

Fan external damper opening of 40°

Press the OK/CLEAR button to complete

the setting.

Display C: Installation setting display

Function

Code

Setting1

Setting2

28 AHU CONTROL KIT

Setting function of wired remote controller installation

Remote control Master/Slave setting

* This is the function to set the mainly

used remote controller.

* You can set one remote controller as

the Master and the rest as Slave.

Enter the Installation Setting mode.

Press the Function Setting button

repeatedly to reach function code of ‘13’.

Flashes

Press the Right button to move to

‘Setting of 1’.

Flashes

Press the Up/Down button to set the value.

Setting value of ‘01’ is the Master and ‘00’ is the Slave.

Master

Slave

Press the OK/CLEAR button to

complete the setting.

Display C: Installation setting display

Function

Code

Setting1 Setting2

Owner's Manual 29

ENGLISH

Manual operating mode

* The SA switch of the control kit during AHU

operation with the wired remote controller must be maintained at OFF condition.

* The RA switch of the control kit during AHU

operation with the wired remote controller must be maintained at OFF condition.

Manual operating mode

SA fan operation

RA fan operation

(Operating LED)

(Selector switch)

When you set the SA Fan Switch to ON,

the SA fan will operate manually.

SA fan operating LED will be turned on.

When you set the SA Fan Switch to OFF,

the SA fan will stop operating and can be operated automatically with the wired remote controller.

When you set the RA Fan Switch to ON,

the RA fan will operate manually.

RA fan operating LED

SA fan operating LED

Wired remote controller

SA fan switch

RA fan switch

RA fan operating LED will be turned on.

When you set the RA Fan Switch to

OFF, the RA fan will stop operating and can be operated automatically with the wired remote controller.

Check before requesting for service

30 AHU CONTROL KIT

Check before requesting for service

When there is a problem with the product, check the following detail before requesting for service to the service center.

Symptom Check Action

The product does not work at all.

The cool air does not flow continuously.

I cannot set the scheduled operation.

AHU automatically goes off.

* Is the main switch turned off? * Is there a power outage?

* The fuse inside the product

can be disconnected.

* Is the desired temperature set

higher than the indoor temperature?

* Is the product running in

Dehumidifier/Power save

mode? * Is the schedule properly set? * Did you check the current

time? * Is the OFF schedule set?

* Turn on the main power switch. * Check the other electric appliances.

(If the power works, try operating the product again.)

* Request for service to the installation service provider or

the service center.

* Set the desired temperature to be lower than the indoor

temperature.

* Change the operating mode to air conditioning.

* Refer to the manual and try setting up the schedule again. * If the current time is incorrect, try setting again.

* Check the remote controller and cancel the OFF schedule.

Owner's Manual 31

ENGLISH

Test run

Self diagnosis function

Error display

Error display method

■ This function displays the self diagnosis and the type of error if identified.

■ For the error display, the applicable code is displayed on the 7 segment LED on the wired remote

controller and AHU controller.

■ If there are 2 or more errors simultaneously, the codes are displayed in the order of occurrence.

■ Once you resolve the error, the error code will disappear.

■ The first display on the 7 segment display refers to the error code and the second part refers to the

location information of the communication PCB address or sensor location. Refer to the following for details.

* The address the communication PCB refers to the rotary switch number on the communication PCB.

* The above table shows the information of the attached location by sensor.

Error type Display condition Example of output Detail description

Basic error CH [Error code] 0 CH30 Error #3

Communication PCB error CH [Error code] [Address] CH204 Error #2 in communication PCB with

address of ‘#4’

Sensor error CH [Error code] [Location] CH1302 Air supply temperature sensor error

Outdoor unit error CH [Error code] [Address] CH17304

Error #173 on the outdoor unit connected

to communication PCB with address of

‘#4’

Location number Location name Applicable sensor type

01 RA Temperature sensor, humidity sensor

02 SA Temperature sensor, humidity sensor

03 OA Temperature sensor, humidity sensor

04 Mixing Temperature sensor

05 Differential pressure Differential pressure sensor

06 Static pressure Static pressure sensor

32 AHU CONTROL KIT

Test run

Error display (AHU)

■ ‘##’ refers to the address information of the communication PCB.

Display number

Error item Cause of error Cause or error

CH 2 ##

CH 3 00

CH 4 ##

CH 5 ##

CH 6 ##

CH 8 00 CH 13 01

02 04

CH 14 01

02 03

CH 15 00

CH 16 05

CH 17 01

Temperature sensor error at pipe inlet of indoor unit Communication error between wired remote controller and AHU controller Communication error between AHU controller and communication PCB Communication error between communication PCB and outdoor unit Temperature sensor error on pipe outlet of indoor unit Emergency operation Temperature sensor error

Humidity sensor error

CO2 sensor error

Pressure sensor error

Air flow sensor error

Communication PCB rotary switch number ##

Mixing

RA SA

Differential pressure

Static pressure

RA SA

Temperature sensor disconnection or short circuit at pipe inlet of indoor unit

No communication signal for more than 3 minutes from wired remote controller to the AHU controller

No communication signal for more than 3 minutes from communication PCB to AHU controller

No communication signal for 5 minutes continuously from communication PCB to outdoor unit

Temperature sensor disconnection or short circuit on pipe outlet of indoor unit

The operating status of the smoke control mode through smoke detector is displayed Temperature sensor (RA/SA/Mixing) disconnection/short circuit/misconnection or when the sensor value is in the error range

Humidity sensor (RA/SA/OA) disconnection/short circuit/misconnection or when the sensor value is in the error range CO2 sensor disconnection/short circuit/misconnection or when the sensor value is in the error range Pressure sensor (Differential pressure, static pressure) disconnection/short circuit/misconnection or when the sensor value is in the error range Air flow sensor (RA, SA) disconnection/short circuit/misconnection or when the sensor value is in the error range

Owner's Manual 33

ENGLISH

Test run

Example of error

Sequence of error

Situation Error

Pipe inlet temperature sensor error (Communication PCB rotary switch number: 01) CH

2 01

Communication error between communication PCB and outdoor unit CH

5 05

(Communication PCB rotary switch number: 05)

SA duct temperature error CH

13 02

RA duct humidity error CH

14 01

* The occurrence of error is displays in the order of 1 2 3 on 7 segment. * Refer to page 43 for details of 2 and 3 .

Refer to the MULTI V technical material for details on error code and checkpoints of the outdoor unit.

34 AHU CONTROL KIT

P/No.: MFL62171702

After reading this manual, keep it in a place easily accessible to the user for future reference.

Printed in Korea

LG PRCKD40E, PRCKD20E User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual