40
E3
or
E5
Remote controller transmission error (E3)/
signal receiving error (E5)
1
Abnormal if remote controller could not
find blank of transmission path for 6
seconds and could not transmit.
(Error code: E3)
2
Remote controller receives transmitted
data at the same time, compares the
data, and when detecting it, judges
different data to be abnormal 30
continuous times. (Error code: E3)
1
Abnormal if indoor controller board could
not find blank of transmission path.
(Error code: E5)
2
Indoor controller board receives
transmitted data at the same time,
compares the data, and when detecting
it, judges different data to be abnormal
30 continuous times. (Error code: E5)
1
Set a remote controller to main, and the
other to sub.
2
Remote controller is connected with only one
indoor unit.
3
The address changes to a separate setting.
4
~
6
Diagnose remote controller.
a) When “RC OK” is displayed, remote
controllers have no problem.
Turn the power off, and on again to check.
When becoming abnormal again, replace
indoor controller board.
b) When “RC NG”is displayed, replace
remote controller.
c) When “RC E3”or “ERC 00-66”is displayed,
noise may be causing abnormality.
1
2 remote controller are set as
“main.”
(In case of 2 remote controllers)
2
Remote controller is connected
with 2 indoor units or more.
3
Repetition of refrigerant
address
4
Defective transmitting receiving
circuit of remote controller
5
Defective transmitting receiving
circuit of indoor controller board
6
Noise has entered into
transmission wire of remote
controller.
Error Code
Abnormal point and detection method
Judgment and action
Case
UP
(4210)
Compressor overcurrent interruption
Abnormal if overcurrent DC bus or com-
pressor is detected after compressor starts
operating for 30 seconds.
1
Stop valve of outdoor unit is
closed.
2
Decrease of power supply
voltage
3
Looseness, disconnection or
converse of compressor wiring
connection
4
Defective fan of indoor/outdoor
units
5
Short cycle of indoor/outdoor
units
6
Defective input circuit of
outdoor controller board
7
Defective compressor
1
Open stop valve.
2
Check facility of power supply.
3
Correct the wiring (U·V·W phase) to
compressor. Refer to 11-9 (Outdoor power
circuit board).
4
Check indoor/outdoor fan.
5
Solve short cycle.
6
Replace outdoor controller circuit board.
7
Check compressor.
Refer to 11-6.
W
Before the replacement of the outdoor
controller circuit board, disconnect the wiring
to compressor from the outdoor power circuit
board and check the output voltage among
phases, U, V, W, during test run. No defect
on board if voltage among phases (U-V, V-W
and W-U) is same. Make sure to perform the
voltage check with same performing frequency.
E0
or
E4
Remote controller transmission error
(E0)/signal receiving error (E4)
1
Abnormal if main or sub remote control-
ler cannot receive normally any trans-
mission from indoor unit of refrigerant
address “0” for 3 minutes.
(Error code : E0)
2
Abnormal if sub-remote controller could
not receive for any signal for 2 minutes.
(Error code: E0)
1
Abnormal if indoor controller board can
not receive any data normally from
remote controller board or from other
indoor controller board for 3 minutes.
(Error code: E4)
2
Indoor controller board cannot receive
any signal from remote controller for 2
minutes. (Error code: E4)
1
Check disconnection or looseness of indoor
unit or transmission wire of remote controller.
2
Set one of the remote controllers “main”.
If there is no problem with the action above.
3
Check wiring of remote controller.
• Total wiring length: max. 500m [1640ft]
(Do not use cable
o
3 or more.)
• The number of connecting indoor units:
max. 16 units
• The number of connecting remote control-
ler: max. 2 units
When the above-mentioned problem of
1
~
3
are not applied.
4
Diagnose remote controllers.
a) When “RC OK” is displayed, remote con-
trollers have no problem.
Turn the power off, and on again to check.
If abnormality generates again, replace
indoor controller board.
b) When “RC NG” is displayed, replace
remote controller.
c) When “RC E3” or "ERC 00-66" is dis-
played, noise may be causing abnormality.
* If the unit is not normal after replacing indoor
controller board in group control, indoor con-
troller board of address “0” may be abnormal.
1
Contact failure at transmission
wire of remote controller
2
All remote controllers are set
as “sub” remote controller. In
this case, E0 is displayed on
remote controller, and E4 is
displayed at LED (LED1, LED2)
on the outdoor controller circuit
board.
3
Miswiring of remote controller
4
Defective transmitting receiving
circuit of remote controller
5
Defective transmitting receiving
circuit of indoor controller board
of refrigerant address “0”.
6
Noise has entered into the
transmission wire of remote
controller.
E1
or
E2
Remote controller control 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.
OCH481C
