SiUS121632EA Troubleshooting for Outdoor Unit
Service Diagnosis 177
7.13 High Pressure Control in Cooling
Error Code
F6
Outdoor Unit LED
Display
A
j
1
i
2
h
3
i
4
i
5
h
Method of Error
Detection
High pressure control (operation halt, frequency drop, etc.) is activated in cooling operation if the
temperature sensed by the outdoor heat exchanger thermistor exceeds the limit.
Error Decision
Conditions
The temperature sensed by the outdoor heat exchanger thermistor rises above
65
°C (149°F).
The error is cleared when the temperature drops below about
49
°C (120.2°F).
Supposed
Causes
The installation space not large enough
Dirty outdoor heat exchanger
Defective outdoor fan motor
Defective stop valve
Defective electronic expansion valve or coil
Defective outdoor heat exchanger thermistor
Defective outdoor unit PCB
Troubleshooting
Check No.01
Refer to P.190
Check No.12
Refer to P.193
Check No.17
Refer to P.197
Check No.18
Refer to P.197
Check No.19
Refer to P.198
(R20418)
Caution
Replace the outdoor fan
motor.
Reconnect the connector or
fan motor lead wires.
Replace the stop valve.
Replace the outdoor heat
exchanger thermistor.
Replace the outdoor unit
PCB (main PCB).
Replace the electronic
expansion valve or the coil.
Replace the outdoor unit
PCB (main PCB).
Change the installation
location or direction.
Clean the outdoor heat
exchanger.
Check the installation space.
NG
OK
OK
NG
NG
OK
OK
OK
NG
NG
Check No. 19
Check the outdoor fan.
Check No. 18
Check the discharge
pressure.
Check No. 12
Check the electronic
expansion valve.
Check No. 01
Check the outdoor heat
exchanger thermistor.
Check No. 17
Check the installation
condition.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
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