22
E6
1
Contact failure, short circuit or,
mis-wiring (converse wiring) of
indoor/outdoor unit connecting
wire
2
Defective transmitting receiving
circuit of indoor controller board
3
Defective transmitting receiving
circuit of indoor controller board
4
Noise has entered into indoor/
outdoor unit connecting wire.
✽
Check LED display on the outdoor control
circuit board. (Connect A-control service tool,
PAC-SK52ST.)
Refer to EA-EC item if LED displays EA-EC.
1
Check disconnection or looseness of indoor/
outdoor unit connecting wire of indoor unit or
outdoor unit.
Check all the units in case of twin triple
indoor unit system.
2
-
4
Turn the power off, and on again to
check. If abnormality generates again,
replace indoor controller board or outdoor
controller circuit board.
✽
Other indoor controller board may have
defective in case of twin triple indoor unit
system.
E7
Indoor/outdoor unit communication
error (Transmitting error)
Abnormal if “1” receiving is detected 30
times continuously though indoor controller
board has transmitted “0”.
1
Defective transmitting receiving
circuit of indoor controller board
2
Noise has entered into power
supply.
3
Noise has entered into outdoor
control wire.
1
-
3
Turn the power off, and on again to
check. If abnormality generates again,
replace indoor controller board.
Indoor/outdoor unit communication
error (Signal receiving error)
1
Abnormal if indoor controller board
cannot receive any signal normally for
six minutes after putting the power on.
2
Abnormal if indoor controller board
cannot receive any signal normally for
three minutes.
3
Consider the unit abnormal under the
following condition: When two or more
indoor units are connected to one
outdoor unit, indoor controller board
cannot receive a signal for three minutes
from outdoor controller circuit board, a
signal which allows outdoor controller
circuit board to transmit signals.
Error Code Meaning of error code and detection method
Cause
Countermeasure
Fb
Abnormality of indoor controller board
Abnormal if data cannot be normally read
from the nonvolatile memory of the indoor
controller board.
1
Defective indoor controller
board.
1
Replace indoor controller board.
E1
or
E2
Abnormality of remote controller con-
trol board
1
Abnormal if data cannot be normally
read from the nonvolatile memory of the
remote controller control board.
(Error code: E1)
2
Abnormal if the clock function of remote
controller cannot be normally operated.
(Error code: E2)
1
Defective remote controller.
1
Replace remote controller.
OC330--1.qxp 05.5.9 1:30 PM Page 22
