Mitsubishi Electric PAA-A18AA1 Manual De Mantenimiento página 49

Error Abnormal point and detection method
Code
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)
3. Abnormal if indoor controller board could not find blank of
transmission path. (Error code: E5)
4. 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)
E6 Indoor/outdoor unit communication error (Signal receiving error)
(6840)
1. Abnormal if indoor controller board cannot receive any sig-
nal normally for six minutes after turning the power on.
2. Abnormal if indoor controller board cannot receive any sig-
nal normally for three minutes.
3. Consider the unit as abnormal under the following condition:
When two or more indoor units are connected to an 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.
E7 Indoor/outdoor unit communication error (Transmitting er-
ror)
(6840)
Abnormal if "1" receiving is detected 30 times continuously
though indoor controller board has transmitted "0".
FB Indoor controller board
(4109) Abnormal if data cannot be read normally from the nonvolatile
memory of the indoor controller board.
E1 Remote controller control board
(6832)
1. Abnormal if data cannot be read normally from the nonvola-
or
tile memory of the remote controller control board. (Error
E2
code: E1)
(6833)
2. Abnormal if the clock function of remote controller cannot be
operated normally. (Error code: E2)
Specifications are subject to change without notice.
PAA-A18, 24, 30, 36, 42AA1/BA1/CA1 and all-
3.
4.
5.
6.
1.
2.
3.
4.
1.
2.
3.
1.
1.
49
Cause
Repetition of refrigerant ad- a) When "RC OK" is displayed, remote control-
dress lers have no problem. Turn the power off, and on
again to check. When becoming abnormal again,
Defective transmitting re-
replace indoor controller board.
ceiving circuit of remote
controller b) When "RC NG" is displayed, replace remote
controller.
Defective transmitting re-
ceiving circuit of indoor
c) When "RC E3" or "ERC 00-66" is displayed,
controller board noise may be causing abnormality.
Noise has entered into
transmission wire of remote
controller.
Contact failure, short circuit ∗ Check LED display on the outdoor control cir-
or, miswiring (converse wir- cuit board. (Connect A-control service tool, PAC-
ing) of indoor/outdoor unit SK52ST.)
connecting wire
Refer to EA-EC item if LED displays EA-EC.
Defective transmitting re-
1. Check disconnection or looseness of indoor/
ceiving circuit of indoor
outdoor unit connecting wire of indoor unit or
controller board
outdoor unit. Check all the units in case of twin
Defective transmitting re- triple indoor unit system.
ceiving circuit of indoor
2~4. Turn the power off, and on again to
controller board
check. If abnormality generates again, replace
Noise has entered into in- indoor controller board or outdoor controller cir-
door/ outdoor unit connect- cuit board.
ing wire
∗ Other indoor controller board may have defect
in case of twin triple indoor unit system.
Defective transmitting re- 1~3. Turn the power off, and on again to check.
ceiving circuit of indoor If abnormality generates again, replace indoor
controller board controller board.
Noise has entered into
power supply
Noise has entered into out-
door control wire
Defective indoor controller 1. Replace indoor controller board.
board
Defective remote controller 1. Replace remote controller.
Countermeasure
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