Troubleshooting
Si10-417
74
Service Diagnosis
5.2.24 High Pressure Control in Cooling
Remote
Controller
Display
F6
Method of
Malfunction
Detection
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.
Malfunction
Decision
Conditions
Activated when the temperature being sensed by the
heat exchanger thermistor rises above 60°C.
(Deactivated when the said temperature drops below
50°C.)
Supposed
Causes
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
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
(R2855)
Replace the fan motor.
Repair the connector
or fan motor lead
wires.
Replace the heat
exchanger thermistor.
Replace PCB.
Replace the electronic
expansion valve or
coil.
Replace the PCB.
Change the air outlet
grille position.
Change the installation
location.
Clean the heat exchanger.
Check the installation space.
Check No.9
Outdoor fan check
Judgment
Check No.6
Heat exchanger thermistor check
Judgment
Check No.7-1
Installation condition
check
Check No.4
Electronic expansion valve check
Abnormal
Normal
Normal
Normal
Normal
Abnormal
Abnormal
Abnormal
Caution
Be sure to turn off power switch before connect or
disconnect connector, or parts damage may be occurred.
Si10-417.fm Page 74 Wednesday, September 22, 2004 6:38 PM
