52
Check code
Main
remote
controller
E12
E15
E16
E18
E19
E20
E23
E25
E26
E28
Outdoor 7-segment display
Check code
E12
E15
E16
—
E19
E20
E23
E25
E26
E28
Auxiliary code
01: Indoor/outdoor communication
02: Between outdoors communication
—
00: Capacity over
01 to: No. of connected units
—
00: No header unit
02: Two or more header units
01: Connection of outdoor of other line
02: Connection of indoor of other line
—
—
No. of normally received outdoor units
No. of detected outdoor units
Detected
position
I/F
I/F
I/F
Indoor
unit
I/F
I/F
I/F
I/F
I/F
I/F
Check code name
Automatic address
start error
No corresponding
indoor unit during
automatic address
No. of connected
indoor units /
Capacity over
Communication error
between indoor header
and follower units
Outdoor unit quantity
error
Other line unit
connected during
automatic address
Communication
sending error between
outdoor units
Duplicated outdoor
follower address setup
Decreased number of
connected outdoor
units
Outdoor follower unit
error
Status
All stop
All stop
All stop
Corresponding
unit only stops.
All stop
All stop
All stop
All stop
All stop
All stop
Error detection condition
• When indoor automatic address started,
other refrigerant circuit system was setting
automatic address.
• When outdoor automatic address started,
indoor automatic address was executed.
Indoor unit is not found when indoor automatic
address start was set up.
• Total capacity of indoor units exceeded
135% of total outdoor capacity.
• No. of connected indoor units are more than
48 units.
[Note]
If this code appears after backup setup of
outdoor unit trouble, set up “No. capacity-over
detection”.
<Setup method of “No. capacity-over
detection”>
Turn on SW09/Bit 2 on I/F P.C. board of
outdoor header unit.
Regular communication between indoor
header and follower units
• There are multiple outdoor units in 1 line.
• There is none of outdoor unit in 1 line.
Unit of other line was connected when indoor
automatic address started.
Transmission of other outdoor unit was
unavailable for 30 seconds or more.
Outdoor addresses manually set up are
duplicated.
The signal was not returned for constant from
the outdoor unit which was receiving signal.
Outdoor header unit received error code from
outdoor follower unit.
Check item (position)
• Setup the address again after disconnecting communication
connection with other refrigerant circuit system.
• Check the communication line connection between indoor and outdoor.
• Check the electric power line error in indoor.
• Check the noise of surrounding devices.
• Power failure
• Check indoor P.C. board error.
• Check the connection capacity of indoor unit.
• Check the HP capacity of indoor unit.
• Check the indoor/outdoor capacity setup
• Check the No. of connected indoor units.
• Check the outdoor I/F P.C. board error
• Check cable of the remote controller.
• Check power cabling of indoor.
• Check P.C. board of indoor.
The outdoor unit connected with communication cable between
indoor and outdoor (U1.U2) is the outdoor unit.
• Check connection of communication line between indoor and outdoor.
• Check outdoor P.C. board(I/F) error.
Separate the cable between lines according to automatic address
setup method in “Address setup”.
In this model, only one outdoor unit is provided to one refrigerant line.
Be sure to check there is no communication connection with outdoor
unit in the other refrigerant line.
Note)
Do not set up the outdoor address manually.
In this model, only one outdoor unit is provided to one refrigerant line.
Be sure to check there is no communication connection with outdoor
unit in the other refrigerant line.
• Check the check code of outdoor follower unit.
<Convenient functions>
When pushing SW04 for 1 second or more under condition that [E28] is displayed on 7-segment display of
outdoor header unit, the fan of outdoor unit which stopped abnormally starts rotating.
If pushing SW04 and SW05 simultaneously, the fan of normal outdoor unit operates.
When pushing SW05 singly, the operation of fan is cleared.
