Mitsubishi Electric CMB-WM108V-AA Service Handbook page 171

[ VIII Troubleshooting ]
7100
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 outdoor unit exceeds limitations.
3. Error source, cause, check method and remedy,
Error source
Outdoor unit (1)
(2)
(3)
HWE1708A
Cause
The model total of indoor units in the sys-
tem with one outdoor unit exceeds the fol-
lowing table.
Model Qj Total
(E)P200 model 300
(E)P250 model 375
(E)P300 model 450
(E)P350 model 525
(E)P400 model 600
(E)P450 model 675
(E)P500 model 750
The model selection switches (SW5-3 - 5-
8) on the outdoor unit are set incorrectly.
SW5
Model
3 4 5
P200 model OFF ON OFF
P250 model
ON ON OFF
P300 model
OFF OFF ON
P350 model
OFF ON ON
P400 model
ON ON ON
P450 model
OFF OFF OFF
P500 model
ON OFF OFF
EP200 model
OFF ON OFF
EP250 model
ON ON OFF
EP300 model
OFF OFF OFF
EP350 model
OFF ON ON
EP400 model
ON ON ON
EP450 model
OFF OFF OFF
EP500 model
ON OFF OFF
The outdoor unit and the auxiliary unit
(OS) that is connected to the same system
are not properly connected.
1) Check the Qj total (capacity code total) of indoor
units connected.
2) Check the Qj setting (capacity code) of the con-
nected indoor unit set by the switch (SW2 on in-
door 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 outdoor and the indoor units,
and change the setting of the Qj (capacity code).
3) Indoor unit Qj table
Check the setting for the model selection switch
on the outdoor unit (Dipswitches SW5-3 - 5-8 on
the outdoor unit control board).
6 7 8
OFF ON OFF
OFF ON OFF
OFF ON OFF
OFF ON OFF
OFF ON OFF
ON ON OFF
ON ON OFF
OFF ON ON
OFF ON ON
OFF ON ON
OFF ON ON
OFF ON ON
ON ON ON
ON ON ON
Confirm that the TB3 on the OC and OS are
properly connected.
- 162 -
Check method and remedy
Qj
Model
15 3
20 4
25 5
32 6
40 8
50 10
GB