Continuous; Noise - Mitsubishi Electric Mr.SLIM PUH-P1VGAA Technical & Service Manual

Error Code Meaning of error code and detection method
Indoor/outdoor unit communication
error (Transmitting error)
(Outdoor unit)
(1) Abnormal if "0" receiving is detected 30
times continuously though indoor con-
E9
troller has transmitted "1".
(6841)
(2) Abnormal if outdoor controller could not
find blank of transmission path for
three minutes.
Not defined error code
EF
This code is displayed when not defined
(6607
error code is received.
or
6608)
<M-NET communication error>
Error Code Meaning of error code and detection method
Address duplicate definition
This error is displayed when transmission
from the units of same address is detect-
ed.
A0
Note) The address and attribute displayed
(6600)
at remote controller indicate the con-
troller that detected abnormality.
Hard ware error of transmission Pline
Transmission processor intended to trans-
mit "0", but "1" appeared on transmission
wire.
Note) The address and attribute display at
remote controller indicate the con-
A2
troller that detected abnormality.
(6602)
BUS BUSY
1. Over error by collision damage
Abnormal if transmitting is not possible
for 8-10 minutes continuously because
of collision of transmission.
2. Data could not reach transmission wire
for 8-10 minutes continuously because
of noise or etc.
Note) The address and attribute displayed
at remote controller indicate the con-
A3 troller that detected abnormality.
(6603)
Communication error with communica-
tion Pline
Defective communication between unit
processor and transmission processor
A6
Note) The address and attribute display at
(6606)
remote controller indicate the con-
troller that detected abnormality.
Case
1 Defective communication circuit
of outdoor controller
2 Noise has entered power supply.
3 Noise has entered indoor/
outdoor unit connecting wire.
4 Indoor/ outdoor unit connecting
wire has contact failure.
5 Defective communication circuit
between indoor and outdoor
unit on indoor controller board.
1 Noise has entered transmis-
sion wire of remote controller.
2 Noise has entered indoor/
outdoor unit connecting wire.
(Note) "Indoor unit" in the text indicates M-NET p.c. board in outdoor unit.
Case
1 There are two or more same
address of controller of out-
door unit, indoor unit, FRESH
MASTER, or LOSSNAY.
2 Noise has entered into trans-
mission signal and signal was
transformed.
1 Error is detected if waveform is
transformed when wiring works
of transmission wire of outdoor
unit, indoor unit, FRESH MAS-
TER or LOSSNAY are done,
or polarity is changed with the
power on and transmission
data collide each other.
2 Defective transmitting receiv-
ing circuit of transmission
processor
3 Transmission data is changed
by the noise on transmission.
1 Transmission processor could
not transmit because short
cycle voltage of noise and the
like have entered into trans-
mission wire continuously.
2 Transmission quantity has
increased and transmission is
not possible because there
was wiring mistake of terminal
block for transmission wire
(TB3) and terminal block for
central control (TB7) in outdoor
unit.
3 Transmission are mixed with
others and occupation rate
on transmission wire rose
because of defective repeater
(a function to connector or
disconnect transmission of
control and central control
system) of outdoor unit, then
abnormality is detected.
1 Data of transmission proces-
sor or unit processor is not
transmitted normally because
of accidental trouble such as
noise or thunder surge.
2 Address forwarding from unit
processor is not transmitted
normally because of defective
transmission processor hard-
ware.
42
Judgment and action
123 Put the power off, and on again to
check. Replace outdoor controller board
if abnormality is displayed again.
12 Put the power off, and on again to check.
Replace indoor controller board or outdoor
controller board if abnormality is displayed
again.
Judgment and action
Search the unit with same address as abnor-
mality occurred. If the same address is found,
shut of the power supply of outdoor unit and
indoor unit and FRESH MASTER or LOSSNAY
at the same time for two minutes or more after
the address is corrected, and put the power on
again.
Check transmission waveform or noise on
transmission wire.
1 If the works of transmission wire is done with
the power on, shut off the power supply of
outdoor unit and indoor unit and FRESH
MASTER or LOSSNAY at the same time for
two minutes or more, and put the power on
again.
2 Check transmission waveform or noise on
transmission wire.
1 Check if transmission wire of indoor unit,
FRESH MASTER, LOSSNAY, or remote
controller is not connected to terminal block
for central control (TB7) of outdoor unit.
2 Check if transmission wore of indoor unit,
FRESH MASTER or LOSSNAY is not
connected to terminal block for transmission
wire of outdoor unit.
3 Check if terminal block for transmission wire
(TB3) and terminal block for central control
(TB7) is not connected.
4 Check transmission waveform or noise on
transmission wire.
Shut of the power supply of outdoor unit and
indoor unit and FRESH MASTER or LOSSNAY
at the same time for two minutes or more, and
put the power on again. System returns nor-
mally if abnormality was accidental malfunction.
If the same abnormality generates again,
abnormality-generated controller may be defec-
tive.