Mitsubishi Electric PQHY-P72ZLMU-A Service Handbook page 305

[ IX Troubleshooting ]
1. Error Code
7101
Capacity code setting error
2. Error definition and error detection method
Connection of incompatible (wrong capacity code) indoor unit or heat source unit
3. Error source, cause, check method and remedy
Error source
Heat source (1) The model name (capacity code) set by
unit the switch (SW2) is wrong.
Indoor unit
*The capacity of the indoor unit can be
confirmed by the self-diagnosis function
(SW4 (SW6-10:OFF) operation) of the
heat source unit.
Heat source (2) The model selection switches (SW5-3 -
unit 5-6) on the heat source unit are set in-
correctly.
HWE15150
Cause
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
- 296 -
Check method and remedy
1) Check the model name (capacity code) of the in-
door 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 power
source of the heat source and the indoor units, and
change the setting of the 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).
GB