Mitsubishi Electric CITY MULTI CMB-P1016V-F, Service Handbook

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Different unit model error
An exclusive R22 refrigerant indoor
unit was connected to a R407C
refrigerant outdoor unit. 1)
7107
7111
Connection No. setting error
Can not operate because connec-
tion No. of indoor unit wrongly set.
Trouble source :
BC controller
Remote control sensor error
Error not providing the tempera-
ture designed to remote control-
ler sensor.
Trouble source :
Indoor unit
1) Indoor unit capacity per connector
joint is exceeded as follows:
Single connection
:
81 or more
Two connection joint :
161 or more
Three connection joint :
241 or more
Four connection joint :
321 or more
2) Four or more indoor units are set
for the same connection.
3) The smallest connection No. has not
been set when used at joint.
1) In case when the old type remote
1) Transmission booster is faulty.
2) Power supply of transmission
booster has been cut.
controller for M-NET is used and the
remote controller sensor is de-
signed on indoor unit. (SW1-1
turned ON)
a) Check indoor unit connection No. in refrigerant
circuit.
1
No four or more indoor units which are set
for the same connection No. A?
2
Check total capacity of indoor units which
are set for the same connections No. Judged as
trouble when it applies to Cause 1).
3
Check whether the smallest connection No.
is set when used at joint.
b) Check whether indoor unit capacity code (SW2)
is wrongly set. (Keep factory shipment condition.)
For erroneous switch setting, modify it, turn off
the power source of outdoor unit, and indoor unit
simultaneously for 5 minutes or more, and then
turn on.
a) Replace the old remote controller by the new
remote controller.
7110 Transmission lince power
failure. Check transmission booster and power supply.
Disconnection of plug on main board.
7113
7130
Main board connection failure. Check all main board connectors and rectify faulty
connection.
Checking
code
Meaning, detecting method Cause Checking method & Countermeasure
If the model name plate
on the outdoor unit says
t h a t i t i s a n e x c l u s i v e
R22 model, and if error
“7130” has occurred, the
MAIN board for the out-
d o o r u n i t i s a R 4 0 7 C
model circuit board, so
replace it with the MAIN
board for the R22 model. An error was
made in the MAIN
board of the out-
door unit (replaced
with the wrong cir-
cuit board).
2)
If the model name plate
for the indoor unit is an
exclusive R22 model, in-
stall a unit which can
also operate with
R407C An error was made
in selecting the in-
door unit (installa-
tion error).
3)
If the model name plate
on the indoor unit indi-
cates that it is also capa-
ble of operating with
R407C, and error “7130”
occurs , the indoor unit’s
circuit board is for an ex-
clusive R22 model, so
replace it with the circuit
board for a unit which is
also capable of using
R407C
If the refrigerant type shown on the model name
plate on the outdoor unit and the settings shown
in the refrigerant model recognition table do not
match, change the settings so that they match. The relation of the SWU3 and TH2
settings on the outdoor unit's main
board establish the following errors.
An error was
made in the indoor
unit’s circuit board
(replaced with the
wrong circuit
board).
SWU3
Exist
R407C
Refrigerant model recognition table
Different unit
model error
(7130)
Not exist
R407C
TH2
R22
Different unit
model error
(7130)
R22