Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook page 310

Error
Error source
Code
7107 BC controller
units connected to the same port
is the port with the smallest number
Error
Error definition and error
Error source
Code
7110 Outdoor unit Unset unit connection
information error
The start-up of the unit
has not completed nor-
mally in the system to
which a transmission
booster is connected.
7111 Indoor unit Remote controller sen-
OA processing sor failure
unit
This error occurs when
the temperature data is
not sent although the re-
mote controller sensor is
specified.
7113 Outdoor unit Model setting error
(short detection)
7117 Outdoor unit Model setting error
(open detection)
7130 Outdoor unit Incompatible units
The check code will ap-
pear when the indoor unit
or the BC controller with
different refrigerant sys-
tems is connected.
YES
Is there a BC
controller (Sub)?
NO
YES
Are 4 or more indoor units
Port No. setting error?
connected to the same port?
NO NO
Adjust the piping
Is the model total of indoor
YES
connection to the port.
greater than the item (1)?
NO
When two ports are used,
Port No. setting error?
connected to the indoor unit?
NO
NO
The wrong model
(capacity code) is set.
NO
Adjust the piping
Change the port No.
connection to the port.
detection method
When all power sources are
turned off after the start-up of
the unit has completed normal-
ly.
When the start-up of the unit
has completed without turning
on the power source of the
transmission booster.
When the power source of the
transmission booster is turned
on afterwards.
The remote controller without
the temperature sensor (the
wireless remote controller or
the M-NET compact remote
controller (mounted type)) is
used and the remote controller
sensor for the indoor unit is
specified. (SW1-1 is ON.)
Short-circuit
Faulty wiring or contact failure
Disconnected connector, dis-
connected wire, or contact fail-
ure
The indoor unit that uses only
R22 refrigerant is connected.
The wrong unit model or the
wrong BC controller model is
connected.
When connecting Mr. SLIM (A
control) with M-NET, the con-
necting adapter for M-NET
must be connected to the in-
door unit.
- 301 -
Check method and remedy
For the address of the BC
controller (Sub), is 50 added to
the smallest indoor unit address,
which is connected to the
BC controller (Sub)?
YES
Change the port No.
Is the address of the indoor
unit, which is connected to the the
BC controller (Main) ,smaller than
that of the indoor, which is
connected to the BC controller
YES
Change the port No.
Is the address of the indoor
unit, which is connected to the the
Change the set
YES
BC controller (Main), smaller than
indoor unit model
that of the indoor, which is
(capacity code).
connected to the BC controller
Cause Check method and remedy
1) Check whether the power
source of the transmission is
turned on.
2) Turn off the power sources of
outdoor/indoor units and trans-
mission booster, and turn them
on again.
Replace the remote controller with
the one with built-in temperature
sensor.
Check all main board connectors
and rectify faulty connection.
Check for the contact of the connec-
tor CNTYP1, 4, 5 on the main board.
Check the model names of the con-
nected indoor unit and the BC con-
troller.
Check whether the connecting
adapter for M-NET is not connected
to the indoor unit.
(Connect the connecting adapter for
M-NET to the outdoor unit.)
[ IX Troubleshooting ]
Change the BC
NO
controller
(Sub) address.
YES
Change the indoor
NO
unit address or
change the BC
controller address
(Sub 1 or 2)?
YES
NO
(Sub 1 or 2)?
YES