Daikin VRV RXYQ72-384XAYCA, Service Manual

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Troubleshooting by Error Code SiUS342004EB
347 Part 6 Service Diagnosis
3.69 Incorrect Electric Heater Capacity Setting
Applicable
Models
FXTQ-TA, FXTQ-TB
Error Code
UA-17
Outline
After attaching optional electric heater, if the electric heater capacity setting (11 (21)-5) is made
mistakenly for heaters not featured in the lineup, heating via unintended levels of airflow will be
prevented.
However, the electric heater will be operable for convenience.
Error Decision
Conditions
Checks when the capacity setting (11 (21)-5) of the electric heater has been set to a non-applicable
value.
Operation After
Error Codes
Decided

The error code UA-17 is displayed on the remote controller.

Indoor units can operate continuously.

Incorrect setting is kept.

Even if the ON condition for electric heater 2 is established, only electric heater 1 will be set to
ON.
(Electric heater 1 set to ON, electric heater 2 set to OFF)
(In order to deliver in terms of user-friendliness and safety, the electric heater can operate at the
lowest possible power levels.)

The airflow of the fan during operation of the electric heater will be set to the largest value within
the CFM dictated by the capacity of each of the electric heaters (electric heater 1, electric heater
2 both set to ON).

All other operations are the same as during normal operation.