mitsubishi 7102 fault code

[cold as]

i have a mitsubishi city multi size 300 with bc controller the 104 - 4ports off it.
2x size 125 ducted units and 1 x size 50.
fault code 7102 all the time, checked that have 30 volts down the mnet - thats ok
the outdoor condenser show it can find the three indoor units, one bc controller and two remotes, but it cannot find the capacity of any of the fan coils.
checked all the capacity setting of each indoor unit!!

does anyone no what maybe the problem????

[marc5180]

Try this page,

http://www.refrigeration-engineer.com/forums/showthread.php?t=28876

[cold as]

cheers for the link but already looked at that one and still does not tell me what the problem is.

[martinw58]

have the units been corectly addresed

Error Code
Wrong number of connected units
2. Error definition and error detection method

The number of connected indoor units is "0" or exceeds the allowable value.

3. Error source, cause, check method and remedy

7102

Error source Cause Check method and remedy
Outdoor unit (1) Number of indoor units connected to the outdoor
terminal block (TB3) for indoor/ outdoor transmission
lines exceeds limitations described below.
1) Check whether the number of units
connected to the outdoor terminal
block (TB3) for indoor/ outdoor
transmission lines does not exceed
the limitation. (See (1) and (2) on
the left.)
(2) Disconnected transmission line of the outdoor unit 2) Check (2) - (3) on the left.
(3) Short-circuited transmission line
When (2) and (3) apply, the following display will
appear.
3) Check whether the transmission
line for the terminal block for centralized
control (TB7) is not connected
to the terminal block for the
indoor/outdoor transmission line
(TB3).

��ME remote controller
Nothing appears on the remote controller because
it is not powered.

��MA remote controller
"HO" or "PLEASE WAIT" blinks.
(4) The model selection switch (SW5-7) on the outdoor
unit is set to OFF. (Normally set to ON)
4) Check the setting for the model selection
switch on the outdoor unit
(Dipswitches SW5-7 on the outdoor
(5) Outdoor unit address setting error unit control board).
The outdoor units in the same refrigerant circuit do
not have sequential address numbers.

Total number of
indoor units
Total number of
LOSSNAY units
(During auto
address
start-up only)
Total number of
outdoor units
Number of units Restriction on the number of units
0 or 1
1 - 17 : HP200
1 - 21 : HP250
1 - 34 : HP400
1 - 43 : HP500
1 : HP200, HP250
2 :

[stufus]

If its all the time even on power reset.
Either the capacity isn't set on the board or the board is faulty.
The only time i get this fault is through my own making ! Pulling the comms connections of the board due to being a lazy bast*rd .It saves on walking.
Cheers
Stu