Test run

Error display (AHU)

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

Display

Error item

Cause of error

Cause or error

number

 

 

 

CH

2

##

Temperature sensor

Communication PCB

Temperature sensor disconnection or short circuit at pipe inlet

 

 

 

error at pipe inlet of

rotary switch number

of indoor unit

 

 

 

indoor unit

##

 

CH

3

00

Communication error

 

No communication signal for more than 3 minutes from wired

 

 

 

between wired remote

-

remote controller to the AHU controller

 

 

 

controller and AHU

 

 

 

 

 

controller

 

 

CH

4

##

Communication error

Communication PCB

No communication signal for more than 3 minutes from

 

 

 

between AHU

rotary switch number

communication PCB to AHU controller

 

 

 

controller and

##

 

 

 

 

communication PCB

 

 

CH

5

##

Communication error

Communication PCB

No communication signal for 5 minutes continuously from

 

 

 

between

rotary switch number

communication PCB to outdoor unit

 

 

 

communication PCB

##

 

 

 

 

and outdoor unit

 

 

CH

6

##

Temperature sensor

Communication PCB

Temperature sensor disconnection or short circuit on pipe

 

 

 

error on pipe outlet of

rotary switch number

outlet of indoor unit

 

 

 

indoor unit

##

 

CH

8

00

Emergency operation

-

The operating status of the smoke control mode through smoke detector is displayed

CH

13

01

Temperature sensor

RA

Temperature sensor (RA/SA/Mixing) disconnection/short

 

 

 

error

 

circuit/misconnection or when the sensor value is in the error

 

 

02

 

SA

range

 

 

04

 

Mixing

 

CH

14

01

Humidity sensor error

RA

Humidity sensor (RA/SA/OA) disconnection/short

 

 

02

 

SA

circuit/misconnection or when the sensor value is in the error

 

 

03

 

OA

range

CH

15

00

CO2 sensor error

-

CO2 sensor disconnection/short circuit/misconnection or when

 

 

 

 

 

the sensor value is in the error range

CH

16

05

Pressure sensor error

Differential pressure

Pressure sensor (Differential pressure, static pressure) disconnection/short

 

 

06

 

Static pressure

circuit/misconnection or when the sensor value is in the error range

CH

17

01

Air flow sensor error

RA

Air flow sensor (RA, SA) disconnection/short circuit/misconnection

 

 

02

 

SA

or when the sensor value is in the error range

 

 

 

 

 

 

32AHU CONTROL KIT

Page 32
Image 32
LG Electronics PRCKD20E Indoor unit, Remote controller to the AHU controller, Controller, Between AHU, Error, Range