Mitsubishi Electric PUHZ-W50VHA Technical Manual page 42

Error Code Abnormal point and detection method
Remote controller transmission error
(E0)/signal receiving error (E4)
1 Abnormal if main or sub remote controller
cannot receive any transmission normally
from Interface unit of refrigerant address
"0" for 3 minutes.
(Error code: E0)
2 Abnormal if sub-remote controller could
not receive any signal for 2 minutes.
(Error code: E0)
E0
1 Abnormal if Interface controller board
or
can not receive any data normally from
E4
remote controller board or from other
Interface controller board for 3 minutes.
(Error code: E4)
2 Interface controller board cannot receive
any signal from remote controller for 2
minutes. (Error code: E4)
Remote controller control board
1 Abnormal if data cannot be read normally
from the nonvolatile memory of the
remote controller control board.
(Error code: E1)
E1
2 Abnormal if the clock function of remote
or
controller cannot be operated normally.
E2
(Error code: E2)
Remote controller transmission error
(E3)/signal receiving error (E5)
1 Abnormal if remote controller could not
fi nd blank of transmission path for 6
seconds and could not transmit.
(Error code: E3)
2 When remote controller receives
the transmitted data same time and
compares these data. Abnormal if the
data is judged to be different for 30
continuous times. (Error code: E3)
1 Abnormal if Interface controller board
could not fi nd blank of transmission path.
E3
(Error code: E5)
or
2 When Interface controller receives
E5
the transmitted data same time and
compares these data. Abnormal if the
data is judged to be different for 30
continuous times. (Error code: E5)
Case
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 Noise has entered into the
transmission wire of remote
controller.
1 Defective remote controller
1 2 remote controllers are set as
"main."
(In case of 2 remote controllers)
2 Defective transmitting receiving
circuit of remote controller
3 Defective transmitting receiving
circuit of Interface controller
board
4 Noise has entered into
transmission wire of remote
controller.
42
Judgment and action
1 Check disconnection or looseness of
Interface 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. 500 m
(Do not use cablex 3 or more.)
• The number of connecting remote
controller: max. 2 units
When it is not the above-mentioned problem of
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
Interface 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 Replace remote controller.
1 Set a remote controller to main, and the
other to sub.
2~4 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
interface 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.