Daikin VRV Aurora RXLQ-TATJU Series, Service Manual

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Troubleshooting by Error Code SiUS341802EC
253 Part 6 Service Diagnosis
3.17 Drain Level above Limit
Applicable
Models
FXFQ-AA, FXFQ-T, FXFQ-P, FXZQ-TA, FXZQ-TB, FXZQ-M, FXUQ-P, FXUQ-PA, FXEQ-P,
FXDQ-M, FXSQ-TA, FXSQ-TB, FXMQ-PB, FXMQ-TB, FXMQ-TA (Option)
Error Code
AF
Method of Error
Detection
Water leakage is detected based on float switch ON/OFF operation while the compressor is not in
operation.
Error Decision
Conditions
When the float switch changes from ON to OFF while the compressor is not in operation.

Error code is displayed but the system operates continuously.
Supposed
Causes

Humidifier unit (optional accessory) leaking

Defective drain pipe (upward slope, etc.)

Defective indoor unit control PCB
Troubleshooting
Modify the drain piping.
YES
YES
N O
Field
drain piping
has a defect such as
up w ard sloping.
N O
A
humidifier
unit (optional
accessory) is installed
on the indoor
unit.
Defective indoor unit control
PCB (A1P).
Check if the humidifier unit is
leaking.
Caution
Be sure to turn off the po w er s w itch before connecting or disconnecting
connectors, or parts may be damaged.