High Pressure Control In Cooling - Daikin FTXS30HVJU Service Manual

SiUS04-924

4.15 High Pressure Control in Cooling

F6
Remote
Controller
Display
Method of
High-pressure control (stop, frequency drop, etc.) is activated in the cooling mode if the
Malfunction temperature being sensed by the heat exchanger thermistor exceeds the limit.
Detection
 Activated when the temperature being sensed by the heat exchanger thermistor rises above
Malfunction
Decision
 The error is cleared when the temperature drops below 122°F(50°C).
Conditions
 The installation space is not large enough.
Supposed
 Faulty outdoor unit fan
Causes
 Faulty electronic expansion valve
 Faulty defrost thermistor
 Faulty outdoor unit PCB
 Faulty stop valve
 Dirty heat exchanger
 Foreign matter stuck in the outdoor unit fan
Troubleshooting
Check No.04
Refer to P.106
Check No.06
Refer to P.108
Check No.07
Refer to P.109
Check No.09
Refer to P.110
Service Diagnosis
149°F(65°C).
Be sure to turn off the power switch before connecting or disconnecting
Caution
the connector, or parts damage may occur.
Check the installation space.
Check No. 07
Check the installation
condition.
Normal
Check No. 09
Check the outdoor fan.
Normal
Check No. 04
Check the electronic expansion valve.
Judgment
Normal
Check No. 06
Check the heat exchanger
Judgment
Normal
Abnormal
Abnormal
Abnormal
Abnormal
Troubleshooting
Change the air outlet grille
position.
Change the installation
location.
Clean the heat exchanger.
Replace the fan motor.
Repair the connector or fan
motor lead wires.
Replace the electronic
expansion valve or coil.
Replace the PCB.
Replace the heat exchanger
thermistor.
Replace PCB.
(R7142)
89