Pc02 Top Temperature Protection Of Compressor - Carrier 38MBRC Series Service Manual

38MBRC: Service Manual
PC 02 (Top Temperature Compressor Protection or High Temperature IPM Module Protection of
Diagnosis and Solution)
Description: For some models with overload protection, If the sampling voltage is not 5V, the LED displays the failure. If the IPM module
temperature is higher than a certain value, the LED displays a failure code.
Recommended parts to prepare:
• Connection wires
• Outdoor PCB
• IPM module board
• High pressure protector
s
• System blockage
Troubleshooting and repair:
Check if the air flow system
of indoor and outdoor units
are obstructed?
No
Turn off the power supply and turn
it on 10 minutes later.
Yes
Check if the temperature of the
compressor Top is more than 90 °C.
Yes
Check if the refrigerant
system is normal.
Yes
Replace the outdoor control PCB.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Clear up the air inlet and outlet or the heat
Yes
exchanger of indoor and outdoor units .
Check if all the connections especially
No the connection of OLP (Over Load
Protector) sensor is good .
Measure the resistance
between the two OLP ports.
Is it zero?
No
Repair the refrigerant
system .
26
No
Yes
No
Yes Replace the outdoor control PCB .
Correct the connection .
Replace the OLP .