Toshiba MMD-UP0481HFP-UL Service Manual page 56

(Check code detected by remote controller)
Check code
Outdoor 7-segment display
Remote control
E01 –
E02 –
E09 –
(Check code detected by central control device)
Check code
Outdoor 7-segment display
Central control
C05 –
C06 –
C12 –
P30
–
(L20)
Note: The same trouble, e.g. a communication trouble, may result in the display of different check codes
depending on the device that detects it. Moreover, check codes detected by the main remote controller /
central control device do not necessarily have a direct impact on air conditioner operation.
Flow selector unit (FS unit) Relation
(Check code detected by indoor unit)
Check code
Outdoor 7-segment display
Main remote control
E17 –
J03 –
J10 –
J11 –
L12 L12
Display of receiving unit
Indicator light block
Operation Timer Ready
Sub-code
–
–
–
Display of receiving unit
Indicator light block
Operation Timer Ready
Sub-code
–
No indication (when
main remote control
also in use)
–
– –
– (L20 is displayed.)
Display of receiving unit
Indicator light block
Operation Timer Ready
Sub-code
–
–
–
–
–
Typical trouble site
Flash
No master remote control,
failure remote control
communication (reception)
Failure remote control
communication (transmission)
Duplicated master remote
control
Typical trouble site
Flash
Failure central control
communication (transmission)
Failure central control
communication (reception)
Bracket alarm for general-
purpose device control
interface
Communication Link
Typical trouble site
Flash
Communication trouble between
indoor unit (s) and FS unit (s)
Duplicated FS units
FS unit overflow trouble
FS unit temperature sensor
(TCS) trouble
FS unit(s) system trouble
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Description of trouble
Signals cannot be received from indoor unit;
master remote control has not been set
(including two remote control).
Signals cannot be transmitted to indoor unit.
Both remote controls have been set as
master remote control in two remote control
(alarm and shutdown for header unit and
continued operation for follower unit)
Description of trouble
Central control device is unable to transmit
signal due to duplication of central control
device
Central control device is unable to receive
signal.
Device connected to general-purpose device
control interface is trouble.
• Duplication addresses of indoor units in
central control device
• With the combination of air conditioning
system, the indoor unit may detect the
check code of L20
Description of trouble
There is no communication from FS unit(s)
More than one FS units have been set up in
one refrigerant line.
FS unit has been shutdown in one refrigerant
line due to detection of overflow
FS unit temperature sensor (TCS) has been
open/short-circuited.
FS unit(s) outside the application setting