Owner's Manual 31
ENGLISH
Test run
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