Toshiba R410A Service Manual page 125

Check code
Main
Outdoor 7-segment display
remote
controller Check code Sub-code
E12 E12 01: Indoor/outdoor
communication
02: Between outdoors
communication
E15 E15 —
E16 E16 00: Capacity over
01 to: No. of connected
units
E18 — —
E19 E19 00: No header unit
02: Two or more header
units
E20 E20 01: Connection of
outdoor of other line
02: Connection of indoor
of other line
E23 E23 —
E25 E25 —
E26 E26 No. of normally received
outdoor units
E28 E28 No. of detected outdoor
units
Detected
AI-NET
Check code name
position
central control
remote controller
42 I/F Automatic address start
error
42 I/F No corresponding indoor
unit during automatic
address
89 I/F No. of connected indoor
units / Capacity over
97, 99 Indoor Communication error
unit between indoor header
and follower units
96 I/F Outdoor unit quantity
error
42 I/F Other line unit
connected during
automatic address
15 I/F Communication sending
error between outdoor
units
15 I/F Duplicated outdoor
follower address setup
15 I/F Decreased number of
connected outdoor units
d2 I/F Outdoor follower unit
error
Status Error detection condition
All stop • When indoor automatic address started, other
refrigerant circuit system was setting automatic
address.
• When outdoor automatic address started, indoor
automatic address was executed.
All stop Indoor unit is not found when indoor automatic address
start was set up.
All stop • 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.
Corresponding Regular communication between indoor header and
unit only stops. follower units
All stop • There are multiple outdoor units in 1 line.
• There is none of outdoor unit in 1 line.
All stop Unit of other line was connected when indoor automatic
address started.
All stop Transmission of other outdoor unit was unavailable for
30 seconds or more.
All stop Outdoor addresses manually set up are duplicated.
All stop The signal was not returned for constant from the
outdoor unit which was receiving signal.
All stop Outdoor header unit received error code from outdoor
follower unit.
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.
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
Convenient functions