LG PRCKD40E Installation Manual page 42

Test run
Error display (AHU)
• '##' refers to the address information of the communication PCB.
Display number
Temperature sensor error at
CH 2 ##
pipe inlet of indoor unit
Communication error between
CH 3 00 wired remote controller and
AHU controller
Communication error between
AHU controller and
CH 4 ##
communication PCB
Communication error between
CH 5 ## communication PCB and
Outdoor unit
Temperature sensor error on
CH 6 ##
pipe outlet of indoor unit
CH 8 00 Emergency operation
01
Temperature sensor error
CH 13 02
04
01
CH 14 02 Humidity sensor error
03
CH 15 00 CO sensor error
2
CH 16 05
Pressure sensor error
06
CH 17 01
Air flow sensor error
02
Example of error
Pipe inlet temperature sensor error (Communication PCB Rotary switch number: 01)
Communication error between communication PCB and Outdoor unit
(Communication PCB Rotary switch number: 05)
SA duct Temperature error
RA duct Humidity error
42 AHU CONTROL KIT
Error item
Communication PCB
Rotary switch number ##
Communication PCB
Rotary switch number ##
Communication PCB
Rotary switch number ##
Communication PCB
Rotary switch number ##
Differential pressure
Situation
Cause of error
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
RA
Temperature sensor (RA/SA/Mixing)
SA
disconnection/short circuit/misconnection or when the
Mixing
sensor value is in the error range
RA
Humidity sensor (RA/SA/OA) disconnection/short
SA
circuit/misconnection or when the sensor value is in
OA
the error range
CO sensor disconnection/short circuit/misconnection
2
-
or when the sensor value is in the error range
Pressure sensor (Differential pressure, static pressure)
disconnection/short circuit/misconnection or when the
Static pressure
sensor value is in the error range
Air flow sensor (RA, SA) disconnection/short
RA
circuit/misconnection or when the sensor value is in
SA
the error range
Cause or error
Error
CH ¡ 2 ¡ 01
CH ¡ 5 ¡ 05
CH ¡ 13 ¡ 02
CH ¡ 14 ¡ 01