Toshiba MMY-MUP0801HT8P-TR Service Manual page 186

Check code
Main Outdoor 7-segment display
remote
Check
Sub-code
controller
code
00:
Capacity over
01-:
No. of units
connected
E16 E16
E18 — —
00:
No header unit
02:
Two or more
E19 E19
header units
01:
Connection of
outdoor unit
from other line
E20 E20
02:
Connection of
indoor unit
from other line
E23 E23 —
E25 E25 —
Address of
outdoor unit
from which
signal is not
received
normally
E26 E26
Location
Description System status
of
detection
I/F Too many All stop
indoor units
connected
Indoor unit Trouble in Stop of
communication corresponding
between indoor unit
header and
follower units
I/F Trouble in All stop
number of
outdoor header
units
I/F Connection to All stop
other line found
during
automatic
address setting
I/F Outdooroutdoor All stop
communication
transmission
trouble
I/F Duplicated All stop
follower outdoor
address
I/F Signal lack of All stop
outdoor unit
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Check code detection
Check items (locations)
condition(s)
• Combined capacity of • Check capacities of indoor
indoor units is too large. units connected.
• Check combined HP
Note: capacities of indoor units.
If this code comes up • Check HP capacity
after backup setting for settings of outdoor units.
outdoor unit failure is • Check No. of indoor units
performed, perform "No connected.
capacity over detected" • Check for failure in outdoor
setting. P.C. board (I/F).
<"No capacity over detected"
setting method>
Turn on SW103 / Bit 3 on I/F
P.C. board of outdoor header
unit.
For Cooling Only model,
this check code is not
displayed even if it exceeds
the combined capacity of
indoor units.
• More than 128 indoor units
are connected.
Periodic communication • Check remote controller
between indoor header and wiring.
follower units cannot be • Check indoor power supply
maintained. wiring.
• Check P.C. boards of
indoor units.
The outdoor unit which
• There are more than one
turned on SW101 and the
outdoor header units in
bit 1 of the interface
one line.
P.C.board is set to Header
• There is no outdoor header
unit.
unit in one line.
• Check SW101 bit 1 of
follower outdoor unit.
• Check connection of
indoor-outdoor
communication line.
• Check for failure in outdoor
P.C. board (I/F).
Check whether the outdoor
Equipment from other line is
unit of other systems or the
found to have been
indoor unit is connected to
connected when indoor
Uv (U1/U2) line or Uc
automatic address setting is
(U5/U6) line.
in progress.
Signal cannot be transmitted • Check power supply to
to other outdoor units for at outdoor units. (Is power
least 30 seconds turned on?)
continuously. • Check connection of tie
cables between outdoor
units for bad contact or
broken wire.
• Check communication
connectors on outdoor
P.C. boards.
• Check for failure in outdoor
P.C. board (I/F).
• Check termination
resistance setting for
communication between
outdoor units.
There is duplication in Note:
outdoor addresses set Do not set outdoor
manually. addresses manually.
Outdoor unit initially • Backup setting is being
communicating normally used for outdoor units.
fails to return signal for • Check power supply to
specified length of time. outdoor unit. (Is power
turned on?)
• Check connection of tie
cables between outdoor
units for bad contact or
broken wire.
• Check communication
connectors on outdoor
P.C. boards.
• Check for failure in outdoor
P.C. board (I/F).