Error Display(Ahu) - LG PRCKD21E Installation Manual

Error display(AHU)

'##' means the address information of communication PCB.
Display
Error category
number
Wrong connection of
CH
1 00
sensor
AHU pipe entrance
CH
2 ## temperature sensor
defect
Communication de-
fect between wired
CH
3 00
remote controller and
AHU Controller
Communication de-
fect between AHU
CH
4 ##
Controller and com-
munication PCB
Communication de-
fect between com-
CH
5 ##
munication PCB and
outdoor unit
Indoor unit pipe exit
CH
6 ## temperature sensor
defect
CH
8 00 Emergency operation
03
Damper Feedback de-
CH 10
04
fect
07
01
02
Temperature sensor
CH 13
defect
03
04
01
Humidity sensor de-
CH 14
02
fect
03
Error occurred
location
When sensor value is within error
Connected sensor
boundary due to the wrong connec-
type
tion of the sensor.
Communication
AHU pipe entrance temperature sen-
PCB rotary switch
sor disconnection or short circuit.
number ##
It occurs when AHU Controller com-
munication signal is not received
-
from wired remote controller for 3
min. or longer.
It occurs when AHU Controller does
Communication
not receive communication signal
PCB rotary switch
from communication PCB for 3 min.
number ##
or longer.
If communication PCB did not re-
Communication
ceive outdoor unit communication
PCB rotary switch
signal continuously for 5 min. or
number ##
longer.
Communication
Pipe exit temperature sensor discon-
PCB rotary switch
nection or shot circuit.
number ##
It displays smoke removal operation
state due to smoke detection (During
-
CH8 release, Dip S/W No. 23 ON,
and PCB Reset).
OA
The current value of damper(OA/Mix-
Mixing
ing/EA) is unknown.
EA
RA
If the sensor value due to the tem-
SA
perature sensor (RA/SA/OA/Mixing)
disconnection/short circuit/single unit
OA
defect is within the error boundary.
Mixing
RA
If the sensor value due to the humid-
ity sensor (RA/SA/OA) disconnec-
SA
tion/short circuit/single unit defect is
within the error boundary.
OA
SELF DIAGNOSIS FUNCTION
Cause of Error occurrence
49