Toshiba MiNi-SMMS MCY-MAP0501HT Service Manual page 126

Check code Check code name
[E06] / [04] Decreased number of indoor units
(TCC-L / AI-NET)
Auxiliary code: No. of indoor units which received signals normally
Is there no mis-wiring/
YES
disconnection on communication line
betweenindoor and outdoor?
NO
NO
Is connection of CN40 connector
on indoor P.C. board normal?
YES
NO
Is connection of CN01 connector
on outdoor I/F P.C. board normal?
YES
NO
Is power of indoor turned on?
YES
NO
Did a power failure occur?
YES
YES
Is there no noise, etc?
NO
®
Check indoor P.C. board. (NOTE)
Defect Replace
1. When signal is not sent for a certain period from the indoor unit
which has been sending signals normally, [E06] is displayed.
Cause of operation
1. Communication lines (U1, U2) connection
error between indoor and outdoor
2. Connector connection error of communica-
tion for indoor P.C. board
3. Connector connection error of communica-
tion for outdoor I/F P.C. board
4. Power supply of indoor unit
(Is power turned on?)
Correct communication line.
Correct wiring of the connector.
Turn on power of indoor unit.
Clear the fault code.
Check noise etc. and eliminate it if any.
Check code Check code name
[E07] / [–] Indoor/Outdoor
communication circuit error
(TCC-L / AI-NET)
(Detected at outdoor side)
Is setup of terminal resistance
of outdoor unit normal?
YES
Is interconnection cable
(U1, U2) between indoor and
outdoor short-circuited?
NO
NO
Is connection of interconnection cable
between indoor and outdoor correct?
YES
Correct
communication line.
YES
Is there an error on
power cable to an outdoor unit?
NO
Correct power cable.
YES
Is there noise source?
NO
Eliminate noise.
®
Outdoor I/F P.C. board failure
Replace
Cause of operation
1. Outdoor communication terminal resistance
setup error
2. Indoor/outdoor communication connection
error
NO
Correct setup of
terminal resistance.
YES
Correct short-circuit.
NO
Is F400 (fuse) on
I/F P.C. board failed?
YES
* Check conduction
with tester.
Turn on power to
start operation.
I/F P.C. board failure
However an emergent operation
is available by inserting connector
from CN01 to CN33.