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AI-NET WORK bus
Indoor unit
AI-NET central control
remote controller
Main
remote controller
OC
F10
Network
adaptor
9
TROUBLESHOOTING
New check code
1. Difference between the new check code and the current system
The displaying method of the check code changes in this model and after.
Used characters
Characteristics of code classification
Block display
Check code in current system
Hexadecimal notation, 2 digits
Few classification of communication/incorrect setup system
Indoor P.C. board, Outdoor P.C. board, Cycle, Communication
New check code
Alphabet + Decimal notation, 2 digits
Many classification of communication/incorrect setup system
Communication/Incorrect setup (4 ways), Indoor protection,
Outdoor protection, Sensor, Compressor protection, etc.
Display
A
C
E
F
H
J
L
P
Classification
Unused
Central control system error
Communication system error
Each sensor error (Failure)
Compressor protective system error
Unused
Setup error, Other errors
Protective device operation
<Display on wired remote controller>
• [CHECK] goes on.
• [UNIT No.] + Check code + Operation lamp (Green) flash
<Display on sensor part of wireless>
• Block display of combination of [ ] [ ] [ ]
<Display on indicater on wiress remote controller
receiver part>
• Unit No. and check code are displayed.
• In a case of error with auxiliary code, check code and
auxiliary code are displayed alternately.
2. Special mention
1) If this model is connected to AI-NET by network adaptor, the different check codes are displayed on the main
remote controller (New check code display on new remote controller) and AI-NET central control remote
controller (Current system check code display on the current system central control remote controller).
2) The check code is displayed only while the air conditioner is operating (Remote controller start button ON).
When the air conditioner stops and the error is cleared, the check code display on the remote controller also
disappears. However, if the error continues after stop of the operation, the check code is immediately
displayed with restarting.