Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook page 307

[ IX Troubleshooting ]
3. System error
Error
Error source
Code
7100 Outdoor unit
7101 Outdoor unit
Indoor unit
Error definition and error
detection method
Total capacity error The model total of indoor units
in the system with one outdoor
The model total of indoor unit exceeds the following ta-
units in the system with ble.
one outdoor unit exceeds
limitations.
Capacity code error The model name (capacity
code) set by the switch (SW2)
The model name (capac- is wrong.
ity code) of the connect-
*The capacity of the indoor unit
ed indoor unit connected
can be confirmed by the self-di-
is inappropriate.
agnosis function (SW1 opera-
tion) of the outdoor unit.
Cause
Model
Capacity Total
P72 108
P96 144
P108 162
P126 189
P144 216
P168 252
P192 288
P204 306
P216 324
P234 351
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Check method and remedy
1) Check the model total (capacity
code total) of indoor units con-
nected.
2) Check the model name (capaci-
ty code) of the connected indoor
unit set by the switch (SW2 on
indoor unit board).
When the model name set by the
switch is different from that of the
unit connected, turn off the power
source of the outdoor and the indoor
units, and change the setting of the
model name (capacity code).
1) Check the model name (capaci-
ty code) of the indoor unit which
has the error source address set
by the switch (SW2 on indoor
unit board).
When the model name set by the
switch is different from that of the
unit connected, turn off the pow-
er source of the outdoor and the
indoor units, and change the set-
ting of the capacity code.