Mitsubishi Electric PFAV-P250VM-E Service Manual page 178

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Table of Contents
[ X 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 outdoor unit exceeds limitations.
3. Error source, cause, check method and remedy
Error source
Outdoor unit
(1)
(2)
(3)
HWE10190
Cause
The model total of indoor units in the sys-
tem with one outdoor unit exceeds the fol-
lowing table.
Model
Qj Total
250 model
500 model
750 model
The model selection switches (SW5-1 - 5-
4) on the outdoor unit are set incorrectly.
SW5
Model
1
2
250 model
ON
ON
OFF
350 model
OFF
ON
400 model
ON
ON
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 (capacity code) of the connected
indoor unit set by the switch (SW2 on indoor unit
board).
69
138
When the model name set by the switch is differ-
ent from that of the unit connected, turn off the
207
power source of the outdoor and the indoor units,
and change the setting of the Qj (capacity code).
Check the setting for the model selection switch
on the outdoor unit (Dipswitches SW5-1 - 5-4 on
the outdoor unit control board).
3
4
OFF
ON
OFF
ON
OFF
Confirm that the TB3 on the OC and OS are
properly connected.
- 169 -
Check method and remedy
GB
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