Mitsubishi Electric PQHY-P72ZLMU-A Service Handbook page 304

[ IX Troubleshooting ]
1. Error Code
7100
Total capacity error
2. Error definition and error detection method
The model total of indoor units in the system with one heat source unit exceeds limitations.
3. Error source, cause, check method and remedy,
Error source
Heat source (1) The model total of indoor units in the sys-
unit tem with one heat source unit exceeds the
following table.
(2) The model selection switches (SW5-3 - 5-
6) on the heat source unit are set incor-
rectly.
(3) The heat source unit and the auxiliary unit
(OS) that is connected to the same system
are not properly connected.
HWE15150
Cause
<PQHY>
Capacity Total
Model
P72 model 93
P96 model 124
P120 model 156
P144 model 187
P168 model 218
P192 model 249
P216 model 280
P240 model 312
P264 model 343
P288 model 374
P312 model 405
P336 model 436
P360 model 468
<PQRY>
Capacity Total
Model
P72 model 108
P96 model 144
P120 model 180
P144 model 216
P168 model 252
P192 model 288
P216 model 324
P240 model 360
P264 model 396
P288 model 432
P312 model 468
P336 model 504
SW5
Model
3 4 5 6
72 model OFF ON OFF OFF
96 model ON ON OFF OFF
120 model OFF OFF ON OFF
144 model ON ON ON OFF
168 model OFF OFF OFF ON
192 model ON OFF OFF ON
- 295 -
Check method and remedy
1) Check the model total (capacity code total) of
units connected.
2) Check the model name (capacity code) of the
connected indoor unit set by the switch (SW2 on
indoor unit board).
When the model name set by the switch is differ-
ent from that of the unit connected, turn off the
power source of the heat source and the indoor
units, and change the setting of the model name
(capacity code).
Check the setting for the model selection switch
on the heat source unit (Dipswitches SW5-3 - 5-
6 on the heat source unit control board).
Confirm that the TB3 on the OC and OS are
properly connected.
GB