Mitsubishi Electric City Multi PQHY-P72 Service Handbook page 224

Error
Error definition and error
Error source
Code
7110 Heat source Unset unit connection
unit 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 Heat source Model setting error
unit (short detection)
7117 Heat source Model setting error
unit (Open detection)
7130 Heat source Incompatible units
unit
The check code will ap-
pear when the indoor
units with different refrig-
erant systems are con-
nected.
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 connect-
ed.The wrong unit 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.
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Cause Check method and remedy
1) Check whether the power
source of the transmission is
turned on.
2) Turn off the power sources of
heat source/indoor units and
transmission 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 connected indoor unit
model.
Check whether the connecting
adapter for M-NET is not connected
to the indoor unit.
(Connect the connecting adapter for
M-NET to the heat source unit.)
[ IX Troubleshooting ]