Carrier 38MBRCQ36AA3 - Compressor Discharge Temperature Protection; PC 06 Protection Diagnosis

38MBRC: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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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 and 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
Stop the leak and add refrigerant
Yes
Replace high pressure valve assembly
Yes
No
YES
?
Is refrigerant leaking ?
Are the
compressor discharge
temperature sensor and PCB
connected properly according
to the wiring
diagram?
Is the compressor discharge
temperature more than
115 °C (R410 a)
/
108°C(R32) ?
Is the value normal ?
Measure the resistance value
of compressor discharge
temperature sensor
YES
Replace the sensor.
NO
Replace outdoor main PCB.
Does a problem still exist ?