Mitsubishi Electric PQHY-P200YLM-A Service Handbook page 335

[ IX Troubleshooting ]
1. Error Code
7105
Address setting error
2. Error definition and error detection method
Erroneous setting of OC unit address
Erroneous setting of BC controller address
3. Cause, check method and remedy
Error source
Heat source Erroneous setting of OC unit address
unit The address of heat source unit is not being set to
BC controller 51 - 100.
The address of BC controller is not set to 51 - 100.
1. Error Code
7106
Attribute setting error
2. Error definition and error detection method
Error source
- A remote controller for use with indoor
units, such as the MA remote controller, is
connected to the OA processing unit whose
attribute is FU.
HWE15060
Cause
Cause
- 326 -
Check method and remedy
Check that the heat source unit and BC con-
troller addresses are set to 00 or a number be-
tween 51 and 100.
If the heat source unit address is out of the val-
id range, reset the address with the power to
the heat source unit turned off.
If the BC controller address is out of the valid
range, reset the address with the power to both
the heat source unit and BC controller turned
off.
Check method and remedy
To operate the OA processing unit directly via a re-
mote controller for use with indoor units, such as the
MA remote controller, set the DIP SW 3-1 on the OA
processing unit to ON.
Operation Method
Interlocked operation
with the indoor unit
Direct operation via the
MA remote controller
SW3-1
OFF
ON
GB