Address - Mitsubishi Electric PUZ-HA30NHA5 Service Manual

Check code Abnormal point and detection method
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.
(Check code: E0)
2 Abnormal if sub-remote controller could
not receive any signal for 2 minutes.
(Check code: E0)
E0
1 Abnormal if indoor controller board can
or
not receive any data normally from
E4
remote controller board or from other
(6831
indoor controller board for 3 minutes.
or
(Check code: E4)
6834)
2 Indoor controller board cannot receive
any signal from remote controller for 2
minutes. (Check code: E4)
Remote controller control board
1 Abnormal if data cannot be read nor-
mally from the nonvolatile memory of the
remote controller control board.
(Check code: E1)
2 Abnormal if the clock function of remote
E1
controller cannot be operated normally.
or
(Check code: E2)
E2
Remote controller transmission error
(E3)/signal receiving error (E5)
1 Abnormal if remote controller could not
find blank of transmission path for 6 sec-
onds and could not transmit.
(Check code: E3)
2 Remote controller receives transmitted
data at the same time, compares the
E3
data, and when detecting it, judges
or
different data to be abnormal 30
E5
continuous times. (Check code: E3)
(6832
or
1 Abnormal if indoor controller board could
6833)
not find blank of transmission path.
(Check code: E5)
2 Indoor controller board receives trans-
mitted data at the same time, compares
the data, and when detecting it, judges
different data to be abnormal 30
continuous times. (Check code: E5)
OCH607
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 Defective transmitting receiv-
ing circuit of indoor controller
board of refrigerant address "0".
6 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 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 trans-
mission wire of remote control-
ler.
32
Judgment and action
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: maximum 1640 ft [500 m]
(Do not use cable o 3 or more.)
• The number of connecting indoor units:
maximum 16 units
• The number of connecting remote control-
ler: maximum 2 units
If the cause of trouble is not any of 1–3 above,
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 00-06" is dis-
played, 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 Replace remote controller.
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 con-
trollers 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 dis-
played, noise may be causing abnormality.