Daikin RZQG71L9V1, Service Manual

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Troubleshooting by Remote Controller ESIE15-13C
128 Service Diagnosis
4.7 Capacity Setting Abnormality
Remote
Controller
Display
AJ
Applicable
Models
All models of indoor unit
Method of Error
Detection
Capacity is determined according to resistance of the capacity setting adaptor and the memory
inside the IC memory on the indoor unit PCB, and whether the value is normal or abnormal is
determined.
Error Decision
Conditions
The error is generated when the following conditions are fulfilled:
Supposed
Causes
 Defective capacity setting adaptor connection

Defective indoor unit PCB
Capacity setting
adaptor
The capacity is set in the PCB’s memory IC. A capacity setting adaptor that matches the
capacity of the unit is required in the following case:
In case the indoor PCB installed at the factory is for some reason changed at the installation
site, the capacity will not be contained in the replacement PCB. To set the correct capacity for
the PCB you have to connect a capacity setting adaptor with the correct capacity setting to the
PCB. The capacity setting for the PCB will become the capacity setting of the adaptor because
the capacity setting adaptor has priority.
Troubleshooting
Condition Description
1

The unit is in operation.
 The PCB’s memory IC does not contain the capacity code.

The capacity setting adaptor is not connected.
2  The unit is in operation.

The capacity that is set, does not exist for that unit.
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Install a capacity setting
adaptor.
Replace the indoor unit PCB.
NO
YES
YES
NO
Replace the indoor unit PCB.
The indoor
unit PCB was replaced
with a spare PCB.
Was the
capacity setting
adaptor mounted when
replacing the
PCB?