Check code
displayed on
remote controller
E04
E16
E25
E26
L04
L05 (*)
L06
L08
Center unit
7-segment
display
E19-00
L08
E08-XX
E07
E06
E16-XX
E25
E26-XX
L04
L06
L08
Cause
Outdoor power is formerly turned on.
There is none of outdoor terminal resistance, or
there are two or more resistances.
(After address setup)
After address was decided, all the
indoor units do not correctly response
after power-ON in outdoor unit.
Address setup error
¥ Only line addresses of the connected indoor units
are undefined.
¥ The outdoor line address and the line addresses in
all indoor units do not match.
¥ The indoor addresses are duplicated.
(Units except those displaying E04 are duplicated.)
¥ A header unit is not set up in a group.
(Except group displaying E04)
Duplication of indoor addresses.
(Address No in which sub-code of the check code
are duplicated)
There is none of outdoor terminal
resistance, or there are two or more
resistances.
(After address setup, when terminal
resistance setup is changed after
power-ON.)
Transmission circuit error at interface side
(P.C. board failure)
After address setup, communication from all the
indoor units interrupted under condition that a
normal operation can be performed.
Exceeded No of connected indoor units or
exceeded capacity.
Duplication of outdoor addresses.
(Only when outdoor address was manually set up)
No. of connected outdoor units decreased.
¥ When setting outdoor backup
¥ The power of follower unit is not turned on.
Duplication of outdoor line addresses
¥ Line address setup error, occurred after connec-
tion between U1, U2 and U3, U4 connectors
Duplicated of indoor units with priority
There are two or more indoor units set up with
priority.
Address setup error
¥ Only indoor addresses of all the connected indoor
units are undefined.
( * )[L05]: Displayed on the indoor unit set up with priority
[L06]: Displayed on the indoor unit except one set up with priority
Countermeasures
Turn on the power again.
(In order of Indoor Outdoor)
Check SW30 bit 2 of the header unit.
No connection between multiple refrigerant lines:
SW30 bit 20N
Connection between multiple refrigerant lines:
SW30 bit 2 of the connected header unit is turned
on only in one line.
Check and modifies disconnection of indoor/outdoor
communication line.(Communication line between
center unit and the leading indoor unit)
Check influence of communication noise.
Set up address again.
Set up address again.
Check SW30 bit 2 of the header unit.
No connection between multiple refrigerant lines:
SW30 bit 20N
Connection between multiple refrigerant lines:
SW30 bit 2 of the connected header unit is turned
on only in one line.
Replace the interface P.C. board.
Check and correct disconnection of indoor/outdoor
communication line.(Communication line between
header unit and the leading indoor unit)
Check influence of communication noise.
Adjust No of connected indoor units or capacity.
Do not use a manual setup for outdoor address.
Correct of cause of error occurrence
¥ If it occurred when setting backup, clear the error
after setup finish.
¥ If the power of follower unit is not turned on, turn
on the power.
Modify line address setup of the header unit
between lines. (Set up SW 13 and 14 on the
interface P.C. board.)
Set up priority to only one indoor unit.
Set up address again.
ON
1
SW30
2
ON
1
SW30
2
In check for No. of connected outdoor units and connected Indoor units
after address setup, diminished No. of connected units displayed.
(There are outdoor/indoor units which do not operate in a test operation.)
There is no display of a check code on 7-segment display on the interface
P.C. board of the header unit though there is indoor unit which does not
accept the operation from the remote controller.
Remote
controller status
No response
No display on
remote controller
(No line is output.)
7-segment
display of
center unit
Remote
controller status
7-segment
display of
center unit
None
None
Cause
Communication line is not connected between indoor and outdoor.
Line and indoor addresses are unset.
(Unit which does not response to remote controller)
The power of the header unit of the group is not turned on in indoor
group control.(Unit which does not response to remote controller)
Group address is set up to follower unit in the individual control.
(Unit which does not response to remote controller)
The power is not turned on.
(Unit which is not displayed on remote controller)
Remote controller is not connected with cable.
(Unit which is not displayed on remote controller)
Miscabling of remote controller
(Unit which is not displayed on remote controller)
Remote controller communication circuit error
(Unit which is not displayed on remote controller)
If 230V is incorrectly applied to the remote controller terminal, the
remote controller communication circuit fails.
Countermeasures
Modify cabling.
Set up address.
Turn on the power.
Set [0] to group address in case of individual
control.
Turn on the power.
Correct cabling.
Correct cabling.
Remove FASTON terminal connected to
remote controller terminals (A/B), and check
the voltage. If voltage is not applied, replace
P.C. board. (15 to 18V usually)
No response L08
E19-00
E19-02
E20-01
Cause
Line addresses and indoor addresses of all the connected indoor
units are unset.
There is no header unit of group control.
Indoor unit power is not turned on.
Indoor/outdoor communication line is not correctly
connected to the header unit. (Fig. 1)
(Indoor/outdoor cannot
communicate before address setup.)
There is none of outdoor terminal resistance, or there are two or
more resistances. (Before address setup)
When connecting indoor/outdoor communication line between
outdoor units under condition of connected communication line
between outdoor units (Fig. 2)
SW08 setup error
Address setup is performed with connecting indoor/outdoor
communication line between outdoor units. (Fig. 3)
Address setup is performed under condition of connecting between
multiple refrigerant lines. (Fig. 3)
Countermeasures
Set up addresses.
Set up group address.
Turn on the power again.
(In order of indoor outdoor)
Correct cabling.
Check SW30 bit 2 of the header unit.
No connection between multiple refrigerant
lines: SW30 bit 2 0N
Connection between multiple refrigerant lines:
SW30 bit 2 of the connected header unit is
turned on only in one line.
Correct cabling.
Turn all SW08 to OFF side.
Correct cabling.
Correct cabling.
Status
Number of connected
outdoor units is short.
Number of connected
indoor units is short.
Number of outdoor
units connected to
group is short in
group operation from
remote controller.
Cause
Miswiring of communication line between
outdoor units or unconnected cable (Fig. 4)
(Address setup operation has finished without
recognition of miswired follower unit.)
Miswiring of communication line between
indoor units or unconnected cable (Fig. 5)
(Address setup operation has finished without
recognition of miswired indoor unit.)
Remote controller is not connected with cable.
Miscabling of remote controller
Remote controller communication circuit error
If 230V is incorrectly applied to the remote
controller terminal, the remote controller
communication circuit fails.
Countermeasures
After modification of wiring, set up address again and check No. of the
connected outdoor units.
After modification of wiring, set up address again and check No. of the
connected indoor units.
Using the main remote controller connected to a group, start a test operation,
specify the unit which does not operate (Unit unconnected to group), and
then check cabling.
Using the main remote controller connected to a group, start a test operation,
specify the unit which does not operate (Unit unconnected to group).
Remove Fasten receptacle connected to remote controller terminals (A/B),
and check the voltage If voltage is not applied, replace P.C. board.
(15 to18V in normal time).
ON
1
SW30
2
15
16
A check Code is Displayed on the Remote Controller
1
Operation from remote controller is not accepted and a check code is dis-
played on 7-segment display of the interface P.C. board of the header unit.
2
3
4
Troubleshooting in Test Operation