LG PRCKD40E Installation Manual page 41

Self diagnosis function
Error display
• 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.
Error display method
• 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.
Error type Display condition
Basic error
Communication
CH [Error code] [Address]
PCB error
Sensor error CH [Error code] [Location]
Outdoor unit error CH [Error code] [Address]
❈ The address the communication PCB refers to Rotary switch number on the communication
PCB.
Location number Location name
01
02
03
04
05 Differential pressure
06
❈ The above table shows the information of the attached location by sensor.
Example of output
CH [Error code] 0
RA Temperature sensor, Humidity sensor
SA Temperature sensor, Humidity sensor
OA Temperature sensor, Humidity sensor
Mixing
Static pressure
CH 3 0 Error #3
CH 2 04 Error #2 in communication PCB with address of '#4'
CH 13 02 Air supply temperature sensor error
Error #173 on the outdoor unit connected to
CH 173 04
communication PCB with address of '#4'
Applicable sensor type
Temperature sensor
Differential pressure sensor
Static pressure sensor
Test run
Detail description
Installation Manual 41