 Troubleshooting 46 
6.22 PC 06 (Discharge temperature protection of compressor diagnosis and solution)
Description: If the compressor discharge temperature exceeds a certain level for nine seconds, the compressor ceases
operation, the LED displays the failure code
Recommended parts to prepare:
• Connection wires
• Discharge temperature sensor
• Additional refrigerant
• Outdoor main PCB
Troubleshooting and repair:
No
Yes
Yes
No
Correct the wiring connection
Correct the wiring connection
Stop the leak and add refrigerant
Stop the leak and add refrigerant
Yes
Replace high pressure valve assy
Replace high pressure valve assy
Yes
No
YES
Is refrigerant leaking?
Is refrigerant leaking?
Are the compressor discharge
temperature sensor and PCB
connected properly according
to the wiring diagram?
Are the compressor discharge
temperature sensor and PCB
connected properly according
to the wiring diagram?
Is the compressor discharge
temperature more than
115°C(R410a)/108°C(R32) ?
Is the compressor discharge
temperature more than
115°C(R410a)/108°C(R32) ?
Is the value normal?
Is the value normal?
Measure the resistance value
of compressor discharge
temperature sensor
Measure the resistance value
of compressor discharge
temperature sensor
YES
Replace the sensor
Replace the sensor
NO
Replace outdoor main PCB.
Replace outdoor main PCB.
Does a problem still exist?
Does a problem still exist?
Note: For certain models, outdoor unit uses combination sensor, T3,T4 and TP are the same of sensor. This
picture and the value are only for reference, actual appearance and value may vary.
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