Mitsubishi Electric City Multi CMB-P1016NU-G, Service Handbook

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[
IX
Troubleshooting ]
7110 Heat source
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.
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. 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.
7111 Indoor unit
OA processing
unit Remote controller sen-
sor failure
This error occurs when
the temperature data is
not sent although the re-
mote controller sensor is
specified.
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.) Replace the remote controller with
the one with built-in temperature
sensor.
7113 Heat source
unit Model setting error
(short detection) Short-circuit
Faulty wiring or contact failure Check all main board connectors
and rectify faulty connection.
7117 Heat source
unit Model setting error
(Open detection) Disconnected connector, dis-
connected wire, or contact fail-
ure Check for the contact of the connec-
tor CNTYP1, 4, 5 on the main board.
7130 Heat source
unit Incompatible units
The check code will ap-
pear when the indoor
units with different refrig-
erant systems are con-
nected.
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. 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.)
Error
Code
Error source
Error definition and error
detection method
Cause Check method and remedy