Refrigerant Overcharged - Daikin REYQ-XA Service Manual

Troubleshooting by Error Code

3.41 Refrigerant Overcharged

F6
Error Code
Applicable
All outdoor unit models
Models
Method of Error
Detect overcharged refrigerant according to outdoor air temperature, heat exchanger deicer
Detection temperature, and liquid pipe temperature during check operation.
Error Decision When the amount of refrigerant, which is calculated using outdoor air temperature, heat exchanger
Conditions deicer temperature, and liquid pipe temperature during check operation, exceeds the regular
charge amount by 30% or more
(If refrigerant is charged slightly over the regular charge amount, F6 may be displayed on the
remote controller.)
Supposed
Causes
Troubleshooting
CHECK 11
309
Refrigerant overcharged
Disconnection of outdoor air thermistor
Disconnection of heat exchanger deicer thermistor
Disconnection of liquid pipe temperature thermistor
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Check for the conditions of
mounting of the temperature
sensors of the outdoor air
thermistor, the heat exchanger
thermistor, and liquid pipe
thermistor to the piping.
Are the temperature
sensors properly
mounted?
YES
Disconnect the outdoor air
thermistor, the heat exchanger
thermistor, and liquid pipe
thermistor from the outdoor
unit main PCB, and then make
measurement of resistance
using a multimeter.
CHECK 11
Normal?
YES
Refer to page 385.
NO
NO
SiUS371901E
Properly connect the thermistors,
and then operate the system.
Replace the abnormal thermistors,
and then operate the system.
Remedy refrigerant overcharging.
Service Diagnosis