– 64 –
E16
E16
00:
Overloading
01-:
No. of units
connected
I/F
Too many indoor
units connected
All stop
• Combined capacity of indoor
units exceeds 135% of
combined capacity of
outdoor units.
Note:
If this code comes up after
backup setting for outdoor
unit failure is performed,
perform “No overloading
detected” setting.
< “No overloading detected”
setting method>
Turn on SW09/Bit 2 on I/F
P.C. board of outdoor header
unit.
• More than 48 indoor units
are connected.
• Check capacities of indoor units
connected.
• Check combined HP capacities of
indoor units.
• Check HP capacity settings of
outdoor units.
• Check No. of indoor units
connected.
• Check for defect in outdoor P.C.
board (I/F).
Check code
Location
of
detection
Description
System status
Error detection
condition(s)
Check items (locations)
E18
—
—
Indoor
unit
Error in
communication
between indoor
header and
follower units
Stop of
corresponding unit
Periodic communication
between indoor header and
follower units cannot be
maintained.
• Check remote controller wiring.
• Check indoor power supply wiring.
• Check P.C. boards of indoor units.
E19
E19
00:
No header unit
02:
Two or more
header units
I/F
Error in number
of outdoor
header units
All stop
• There is more than one
outdoor header unit in one
line.
• There is no outdoor header
unit in one line.
Outdoor header unit is outdoor unit
to which indoor outdoortie cable
(U1,U2) is connected.
• Check connection of indoor-outdoor
communication line.
• Check for defect in outdoor P.C.
board (I/F).
E20
E20
01:
Connection of
outdoor unit from
other line
02:
Connection of
indoor unit from
other line
I/F
Connection to
other line found
during automatic
address setting
All stop
Equipment from other line is
found to have been connected
when indoor automatic
address setting is in progress.
Disconnect inter-line tie cable in
accordance with automatic address
setting method explained in “Address
setting” section.
E23
E23
—
I/F
Outdoor outdoor
communication
transmission error
All stop
Signal cannot be transmitted
to other outdoor units for at
least 30 seconds continuously.
• Check power supply to outdoor
units. (Is power turned on?)
• Check connection of tie cables
between outdoor units for bad
contact or broken wire.
• Check communication connectors
on outdoor P.C. boards.
• Check for defect in outdoor P.C.
board (I/F).
• Check termination resistance
setting for communication between
outdoor units.
E26
E26
Address of
outdoor unit from
which signal is
not received
normally
I/F
Dropping out of
outdoor unit
All stop
Outdoor unit initially
communicating normally fails
to return signal for specified
length of time.
• Backup setting is being used for
outdoor units.
• Check power supply to outdoor
unit. (Is power turned on?)
• Check connection of tie cables
between outdoor units for bad
contact or broken wire.
• Check communication connectors
on outdoor P.C. boards.
• Check for defect in outdoor P.C.
board (I/F).
E28
E28
Detected
outdoor unit No.
I/F
Outdoor follower
unit error
All stop
Outdoor header unit receives
error code from outdoor
follower unit.
• Check check code displayed on
outdoor follower unit.
<Convenient functions>
If SW04 is pressed and held for at
least 1 second while [E28] is
displayed on the 7-segmentdisplay
of outdoor header unit, the fan of the
outdoor unit that has been shut down
due to an error comes on.
If SW04 and SW05 are pressed
simultaneously, the fans of normal
outdoor units come on.
To stop the fan or fans, press SW05
on its own.
E25
E25
—
I/F
Duplicated
follower outdoor
address
All stop
There is duplication in outdoor
addresses set manually.
Note:
Do not set outdoor addresses
manually.
Outdoor 7-segment display
Check
code
Sub-code
Main
remote
controller
