62
YES
NO
Are U1, U2, U3, and U4
connectors connected?
Disconnect connector connection
of U1, U2, U3, and U4.
Set up address again.
(Refer to “Address setup procedure”.)
Turn on power of
outdoor unit again.
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
Did a power failure occur?
Is there no noise source?
Is connection of CN01
connector on I/F P.C. board of
header outdoor unit correct?
Is communication line between
indoor and outdoor normal?
Is connection of CN40 connector
on indoor P.C. board correct?
Is there any connection
error of power cable?
Set up address again
after resetting power supply.
Set up address again after
resetting power supply.
Correct communication line.
Correct connection of connector.
Correct connection of connector.
Correct power cable.
Eliminate noise.
Check code
[E12] / [42]
(Current code / AI-NET)
Check code name
Automatic address
start error
Cause of operation
1. When indoor automatic address started, other refrigerant
circuit system was setting automatic address.
2. When outdoor automatic address started, the indoor
automatic address was being set. (Sub-code: 02)
Sub-code: 01: Communication between indoor and outdoor 02: Communication between outdoor units
Check code
[E15] / [42]
(Current code / AI-NET)
Check code name
No corresponding indoor unit
during automatic address
Cause of operation
1. Communication line connection error between
indoor and outdoor.
2. Indoor power system error
3. Noise from surrounding devices
4. Power failure
5. Indoor P.C. board error
FILE NO. SVM-05052
Summary of Contents for MMK-AP0072H
Page 125: ...TOSHIBA CARRIER CORPORATION ...
