Check code
41
Abnormal points and detection method
Judgment and action
Case
UP
(4210)
Compressor overcurrent interruption
Abnormal if overcurrent DC bus or
compressor 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 "10-9. TEST POINT
DIAGRAM (Outdoor power circuit board)".
4
Check indoor/outdoor fan.
5
Solve short cycle.
6
Replace outdoor controller circuit board.
7
Check compressor.
Refer to "10-6. HOW TO CHECK THE PARTS".
Note:
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
(6831
or
6834)
E1
or
E2
(E1: 6201)
(E2: 6202)
Remote controller control board
1
Abnormal if data cannot be read
normally from the nonvolatile memory of
the remote controller control board.
(Check code: E1)
2
Abnormal if the clock function of remote
controller cannot be operated normally.
(Check code: E2)
1
Defective remote controller
1
Replace remote controller.
Remote controller transmission
error(E0)/signal receiving error(E4)
1
Abnormal if main or sub remote controller
cannot receive any transmission
normally from indoor unit of refrigerant
address “0” for 3 minutes.
(Check code : E0)
2
Abnormal if sub remote controller could
not receive any signal for 2 minutes.
(Check code: E0)
1
Abnormal if indoor controller board
cannot receive any data normally from
remote controller board or from other
indoor controller board for 3 minutes.
(Check code: E4)
2
Indoor controller board cannot receive
any signal from remote controller for 2
minutes. (Check 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
(Do not use cablex 3 or more.)
• The number of connecting indoor units:
max. 16units
• The number of connecting remote
controller: max. 2units
If the cause of trouble is not in
1
–
3
4
Diagnose remote controllers.
a) When “RC OK” is displayed, remote
controllers 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 displayed,
noise may be causing abnormality.
Note: If the unit is not normal after replacing
indoor controller board in group control,
indoor controller 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
Mis-wiring 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.
E3
or
E5
(6832
or
6833)
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.
(Check code: E3)
2
Remote controller receives transmitted
data at the same time and compares the
received and transmitted data. Abnormal
if these data are judged to be different
30 continuous times. (Check code: E3)
1
Abnormal if indoor controller board could
not find blank of transmission path.
(Check code: E5)
2
Indoor controller board receives
transmitted data at the same time and
compares the received and transmitted
data. Abnormal if these data are judged
to be different 30 continuous times.
(Check code: E5)
1
Set a remote controller to main, and the
other to sub.
2
Connect remote controller with only one
indoor unit.
3
Change the address 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 controllers are set as
“main.”
(In the 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.
OCH566A
