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

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[
IX
Troubleshooting ]
7102 Heat source
unit Error in the number of
connected units
The number of connect-
ed indoor units is "0" or
exceeds the allowable
value.
(1) Number of indoor units
connected to the heat
source terminal block
(TB3) for indoor/heat
source transmission lines
exceeds limitations de-
scribed below.
(2) The heat source unit ad-
dress is set to 51-100 al-
though the address is
automatically set up (MA
remote controller). ("HO"
or "PLEASE WAIT" ap-
pears on the display on
MA remote controller.)
(3) Disconnected transmis-
sion line of the heat source
unit
(4) Short-circuited transmis-
sion line
When (3) and (4) apply,
the following display will
appear.
ΠIn case of M-NET remote
controller
-> Nothing appears on the
display as no power is
supplied to the remote
controller.
ΠIn the case of MA remote
controller
-> "HO" or "PLEASE
WAIT" will blink
(5) Disconnected transmis-
sion line on BC controller
1) Check whether the number of
units connected to the heat
source terminal block (TB3) for
indoor/heat source transmission
lines does not exceed the limita-
tion. (See (1) to (4) on the left.)
2) Check (2) - (5) on the left.
3) Check whether the transmission
line for the terminal block for
centralized control (TB7) is not
connected to the terminal block
for the indoor/heat source trans-
mission line (TB3).
7105 Heat source
unit
BC controller Address setting error
Erroneous setting of OC
unit address
Erroneous setting of BC
controller address
Erroneous setting of OC unit
address
The address of heat source
unit is not set to 00 or to 51 -
100.The address of BC control-
ler is not set to 51 - 100. Check that the address of the OC unit
and the BC controller is set to 51 - 100.
If the heat source unit address is out of
the allowable range, turn off the power
of the heat source unit, and set the ad-
dress again.
If the BC controller address is out of
the allowable range, turn off the power
of both the heat source unit and the BC
controller, and set the address again.
Error
Code
Error source
Error definition and error
detection method
Cause Check method and remedy
1-15 : P72 model
1-19 : P96 model
1
0 or 1
0,1 or 2
0 or 1
Restriction on the
number of units
Number of units
2) Number of BC
controllers
3) Number of Main
BC controllers
4) Number of Sub
BC controllers
5) Total number of
LOSSNAY units
(During auto
address
start-up only)
1) Total number of
indoor units