Gas Furnace Abnormality - Daikin VRV RXYQ72-384XAYCA Service Manual

Troubleshooting by Error Code

3.16 Gas Furnace Abnormality

Applicable
CXTQ-TA
Models
AA-03
Error Code
Method of Error
Detects the error signal from the gas furnace when any error occurs on the gas furnace. The indoor
Detection unit displays AA-03 for any sort of gas furnace abnormality.
Error Decision
The error status differs depending on each error code of the gas furnace. Refer to the gas furnace
Conditions manual for details.
Supposed
The cause of the error differs depending on each error code of the gas furnace. Refer to the gas
Causes furnace manual for details.
Troubleshooting
Note(s)
1. In some cases of gas furnace abnormality regarding gas combustion, once an error occurs,
display indication of AA-03 is retained even after the gas furnace recovered from the error to notify
the occurrence of the error.
The error indication disappears if you execute gas furnace combustion once or reset the indoor unit
power supply.
251
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Error code is
YES
displayed on the gas
furnace PCB.
NO
SiUS342004EB
Take a measure responding to the
error code of the gas furnace.
Execute gas furnace combustion
operation once or reset the indoor
unit power supply. (∗1)
Part 6 Service Diagnosis