– 57 –
Check code
Check code name
Possible causes
Malfunction of I/U fan motor
A. Failure of fan motor connector
B. Failure of fan motor
C. Failure of I/U board
D. Failure of cross flow fan shaft
[P12]
(New code)
When AC cord is plugged
in, I/U fan starts rotating.
Check voltage on the motor connector CN210 pin
GND,
black) and pin
(+V line, yellow) while fan is rotating.
1.0VDC or
higher
Check the fan motor output DC voltage on the I/U board.
Failure of I/U
MCC-1510 board
Below 1.0VDC
Failure of
I/U fan motor
P.C.board
CN210
Yellow
Black
DC
6 (Blue)
5 (Yellow)
4 (White)
3 (Black)
2
1 (Red)
Check code
Check code name
Possible causes
Other I/U errors
(Group follower I/U error)
When an error occurs with other units in the group
[P31]
(New code)
When header unit detects E03, L03, L07 or L08 during group operation,
“
31
”
is indicated on follower units in the
group and their operation stops. No code or alarm log is displayed on the R/C.
