42
Error Code
Meaning of error code and detection method
Case
Judgment and action
A0
(6600)
Address duplicate definition
This error is displayed when transmission
from the units of same address is detect-
ed.
Note) The address and attribute displayed
at remote controller indicate the con-
troller that detected abnormality.
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.
Search the unit with same address as abnormality
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 cor-
rected, and put the power on again.
Check transmission wave form or noise on trans-
mission wire.
A2
(6602)
Hard ware error of transmission
processor
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-
troller that detected abnormality.
1
Error is detected if wave form is
transformed when wiring works of
transmission wire of outdoor unit,
indoor unit, FRESH MASTER or
LOSSNAY are done, or polarity is
changed with the power on and
transmission data collide each other.
2
Defective transmitting receiving
circuit of transmission processor
3
Transmission data is changed by
the noise on transmission.
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 wave form or noise on
transmission wire.
A3
(6603)
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-
troller that detected abnormality.
1
Transmission processor could
not transmit because short cycle
voltage of noise and the like
have entered into transmission
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 trans-
mission of control and central
control system) of outdoor unit,
then abnormality is detected.
1
Check if transmission wire of indoor unit,
FRESH MASTER, LOSSNAY, or remote con-
troller 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 con-
nected 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 wave form or noise on
transmission wire.
<M-NET communication error>
(Note) “Indoor unit” in the text indicates M-NET board in outdoor unit.
Error Code Meaning of error code and detection method
Case
Judgment and action
P8
1
Slight temperature difference
between indoor room
temperature and pipe <liquid
or condenser / evaporator>
temperature thermistor
• Shortage of refrigerant
• Disconnected holder of pipe
<liquid or condenser /
evaporator> thermistor
• Defective refrigerant circuit
2
Converse connection of
extension pipe (on plural units
connection)
3
Converse wiring of indoor/
outdoor unit connecting wire
(on plural units connection)
4
Defective detection of indoor
room temperature and pipe
<condenser / evaporator>
temperature thermistor
5
Stop valve is not opened
completely.
Abnormality of pipe temperature
<Cooling mode>
Detected as abnormal when the pipe tem-
perature is not in the cooling range 3 min-
utes later of compressor start and 6 min-
utes later of the liquid or condenser/evapo-
rator pipe is out of cooling range.
Note 1) It takes at least 9 min. to detect.
Note 2) Abnormality P8 is not detected in
drying mode.
Cooling range : Indoor pipe temperature
(TH2 or TH5) – intake temperature
(TH1)
[
-3 deg
TH: Lower temperature between: liquid
pipe temperature and condenser/
evaporator temperature
<Heating mode>
When 10 seconds have passed after the
compressor starts operation and the hot
adjustment mode has finished, the unit is
detected as abnormal when
condenser/evaporator pipe temperature is
not in heating range within 20 minutes.
Note 3) It takes at least 27 minutes to
detect abnormality.
Note 4) It excludes the period of defrosting
(Detection restarts when defrosting
mode is over)
Heating range : 3 deg
[
(Condenser/
Evaporator temperature(TH5) –
intake temperature(TH1))
1
~
4
Check pipe <liquid or condenser /
evaporator> temperature with room
temperature display on remote
controller and outdoor controller circuit
board.
Pipe <liquid or condenser / evaporator>
temperature display is indicated by
setting SW2 of outdoor controller circuit
board as follows.
23
Check converse connection of extension
pipe or converse wiring of indoor/outdoor
unit connecting wire.
Conduct temperature check with outdoor
controller circuit board after connecting
‘A-Control Service Tool(PAC-SK52ST)’.
(
)
1
2
3
4
5
6
ON
OFF
1
2
3
4
5
6
ON
OFF
1
2
3
4
5
6
ON
OFF
1
2
3
4
5
6
ON
OFF
A-Control Service Tool SW2 setting
Temperature display of indoor liquid pipe
Indoor 1
Temperature display of indoor liquid pipe
Indoor 2
Temperature display of indoor condenser/
evaporator pipe Indoor 1
Temperature display of indoor condenser/
evaporator pipe Indoor 2
OC294-D-2.qxp 05.3.9 11:03 AM Page 42
