Daikin AT12BV1LS Pocket Manual page 75

Troubleshooting
5.2.24 High Pressure Control in Cooling
Remote
Controller
Display
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Trouble
shooting
Check No.4
Refer to
P.151
Check No.6
Refer to
P.157
Check
No.7-1
Refer to
P.158
Check No.9
Refer to
P.160
74
F6
High-pressure control (stop, frequency drop, etc.) is
activated in the cooling mode if the temperature being
sensed by the heat exchanger thermistor exceeds the
limit.
Activated when the temperature being sensed by the
heat exchanger thermistor rises above 60°C.
(Deactivated when the said temperature drops below
50°C.)
The installation space is not large enough.
Faulty outdoor unit fan
Faulty electronic expansion valve
Faulty defrost thermistor
Faulty outdoor unit PCB
Faulty stop valve
Dirty heat exchanger
Be sure to turn off power switch before connect or
Caution disconnect connector, or parts damage may be occurred.
Check the installation space.
Check No.7-1
Installation condition
check
Normal
Check No.9
Outdoor fan check
Normal
Check No.4
Electronic expansion valve check
Judgment
Normal
Check No.6
Heat exchanger thermistor check
Judgment
Normal
Abnormal
Change the air outlet
grille position.
Change the installation
location.
Clean the heat exchanger.
Abnormal
Replace the fan motor.
Repair the connector
or fan motor lead
wires.
Abnormal
Replace the electronic
expansion valve or
coil.
Replace the PCB.
Abnormal
Replace the heat
exchanger thermistor.
Replace PCB.
Service Diagnosis
Si10-417
(R2855)