Filter
Top Products
94
8-5. Troubleshooting in Test Operation
If the phenomena appear, such as a check code is output or the remote controller is not accepted in power-ON
after cabling work or in address setup operation, the following causes are considered.
8-5-1. A check Code is Displayed on the Remote Controller
(∗) [L05]: Displayed on the indoor unit set up with priority
[L06]: Displayed on the indoor unit except one set up with priority
Check code
displayed on
remote controller
E04
E16
E25
L04
L05 (∗)
L06 (∗)
L08
Outdoor
unit
7-segment
display
E19-00
L08
E08-XX
E07
E06
E16-XX
E25
L04
L06
L08
Cause
Outdoor power is formerly turned on.
There is none of outdoor terminator resistor, 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)
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.
Countermeasures
Turn on the power again.
(In order of Indoor → Outdoor)
Check SW30 bit 2 of the outdoor unit.
No connection between multiple refrigerant lines:
SW30 bit 20N
Connection between multiple refrigerant lines:
SW30 bit 2 of the connected outdoor unit is turned
on only in one line.
Check and modifies disconnection of indoor/outdoor
communication line.(Communication line between
outdoor 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 outdoor unit.
No connection between multiple refrigerant lines:
SW30 bit 20N
Connection between multiple refrigerant lines:
SW30 bit 2 of the connected outdoor 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
outdoor 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.
Modify line address setup of the outdoor unit
between lines. (Set up SW 13 and 14 on the
interface P.C. board.)
The Heat Recovery Multi is not set up on priority.
Set up address again.
ON
1
SW30
2
ON
1
SW30
2