Toshiba MCY-MHP0806HT8-C Series Service Manual page 107

Check code
Outdoor 7-segment display
Main
remote
Check
Sub-code
controller
code
E09 – –
E10 – –
E12 E12 –
E15 E15 –
00:
Overloading
01-:
No. of units
connected
E16 E16
E18 – –
01:
Connection of
outdoor unit
from other line
E20 E20
02:
Connection of
indoor unit from
other line
Fan IPDU
A3-IPDU
1 (Upper) 2 (Lower)
O
01
O
02
E 3 1 E 3 1
03 O O
04 O
O O
05
O O
06
07 O O O
Circle (O): Faulty IPDU
Location
of Description System status
detection
Remote Duplicated Stop of
controller master remote corresponding
controller unit
Indoor Indoor inter- Stop of
unit MCU corresponding
communication unit
trouble
I/F Automatic All stop
address starting
trouble
I/F Indoor unit not All stop
found during
automatic
address setting
I/F Too many All stop
indoor units
connected
Indoor Trouble in Stop of
unit communication corresponding
between indoor unit
header and
follower units
I/F Connection to All stop
other line found
during
automatic
address setting
I/F IPDU All stop
communication
trouble
Check code detection
condition(s)
In two remote controller
configuration (including
wireless), both controllers are
set up as master. (Header
indoor unit is shut down with
alarm, while follower indoor
units continue operating.)
Communication cannot be
established / maintained
upon turning on of power or
during communication.
Indoor automatic address
setting is started while
automatic address setting for
equipment in other refrigerant
line is in progress.
Indoor unit cannot be
detected after indoor
automatic address setting is
started.
Combined capacity of
•
indoor units exceeds 200%
(included HWM) or 130%
(not included HWM) of
combined capacity of
outdoor units.
Note:
If this code comes up
after backup setting for
outdoor unit failure is
performed, perform "No
overloading detected"
setting.
<"No overloading detected"
setting method>
Turn on SW09 / Bit 2 on I/F
P.C. board of outdoor unit.
・More than 12 indoor units
are connected for
MCY-MHP0806*,
MHP0906*
・More than 16 indoor units
are connected for
MCY-MHP1006*.
Periodic communication
between indoor header and
follower units cannot be
maintained.
Equipment from other line is
found to have been
connected when indoor
automatic address setting is
in progress.
Communication is disrupted
between IPDUs (P.C.
boards) in inverter box.
106
119
Check items (locations)
• Check remote controller
settings.
• Check remote controller
P.C. boards.
• Check for trouble in indoor
P.C. board.
• Perform automatic address
setting again after
disconnecting
communication cable to
that refrigerant line.
• Check connection of
indoor-outdoor
communication line.
• Check for trouble in indoor
power supply system.
• Check for noise from other
devices.
• Check for power failure.
• Check for trouble in indoor
P.C. board.
• Check capacities of indoor
units connected.
• Check combined HP
capacities of indoor units.
• Check HP capacity
settings of outdoor units.
• Check No. of indoor units
connected.
• Check for trouble in outdoor
P.C. board (I/F).
• Check remote controller
wiring.
• Check indoor power supply
wiring.
• Check P.C. boards of
indoor units.
• Disconnect inter-line tie
cable in accordance with
automatic address setting
method explained in
"Address setting" section.
• Check wiring and
connectors involved in
communication between
IPDU-I/F P.C. board for
bad contact or broken wire.
• Check for defect in outdoor
P.C. board (I/F, A3-IPDU
or Fan IPDU).
• Check for external noise.