35
Troubleshooting
in Test Operation
90
If there are phenomena such as the output of a check code or the remote controller is not accepted when
powered on after wiring work or during address setup operation, the following causes are considered.
A Check Code is displayed on the remote controller
* “L05”: Displayed on the indoor unit set up with priority
“L06”: Displayed on the indoor units except the one set up with priority
Check code
displayed on the
indoor remote
controller
Header
unit 7-
segment
display
s
e
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u
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m
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t
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u
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C
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s
u
a
C
E04
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i
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C
ff
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w
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W
–
L08
Address setup error
• Only line addresses of the connected indoor units
are undefined.
• The outdoor line address and the line addresses
of all the 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 group control (except
groups displaying E04).
Set up the address again.
E08 -XX
Alternate
blinking
Duplication of indoor addresses (address number in
the subcode of the check code are duplicated).
Set up the address again.
E07
There is no outdoor terminator or there are
two or more terminator resistor.
(After address setup, when terminator
setup is changed after power on)
Check SW30 bit 2 of the header unit.
No connection between multiple refrigerant lines:
SW30 bit 2 is on.
Connection between multiple refrigerant lines:
SW30 bit 2 of the connected header unit is turned on
only for one line.
Transmission circuit error at the interface side (PC
board failure)
Replace the interface PC board.
E06
After address setup, communication from all the
indoor units is interrupted under the condition that a
normal operation can be performed.
Check and correct disconnection of the indoor/
outdoor communication line (the communication line
between the header unit and the leading indoor
unit).
Check for the influence of communication noise.
E16
E16 -XX
Alternate
blinking
Exceeded the number or capacity of connected
indoor units
Adjust the number or capacity of connected indoor
units.
E23
E23
Communication between outdoor units has stopped. Check the number of connected outdoor units.
Check that outdoor unit power is on.
E25
E25
Duplication of outdoor addresses (only when an
outdoor address was manually set up)
Do not use manual setup for outdoor addresses.
E26
E26 -XX
Alternate
blinking
Number of connected outdoor units has decreased.
• When installing an outdoor backup
• The power of a follower unit is not turned on.
Correction of the cause of error occurrence
• If it occurs when installing a backup, clear the error
after setup finishes.
• If the power of a follower unit is not turned on, turn
on the power.
L04
L04
Duplication of outdoor line addresses
• Line address setup error (occurred after
connection between U1/U2 and U3/U4
connectors)
Modify the line address setup of the header unit
between lines. (Set up SW13 and SW14 on the
interface PC board.)
L05(*)
L06
Duplication of indoor units with priority
Set up priority only for one indoor unit.
L06(*)
There are two or more indoor units set up with
priority.
Among indoor units indicating “L05,” set one u nit
with priority.
L08
L08
Address setup error
• Only indoor addresses of all the connected indoor
units are undefined.
Set up the addresses again.
Modify the setup.
ON
1
2
SW30
<Cooling, Heat pump type>
Summary of Contents for SMMS-e
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