38MBRC: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
26
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
• System blockage
s
Troubleshooting and repair:
Check if the air ow system
of indoor and outdoor units
are obstructed?
Clear up the air inlet and outlet or the heat
exchanger of indoor and outdoor units .
Yes
No
Yes
Yes
Turn o the power supply and turn
it on 10 minutes later.
Check if the temperature of the
compressor Top is more than 90 °C.
No
Check if the refrigerant
system is normal.
Repair the refrigerant
system .
Replace the outdoor control PCB.
Yes
Check if all the connections
especially
the connection of OLP (Over Load
Protector) sensor is good .
Correct the connection .No
Measure the resistance
between the two OLP ports.
Is it zero?
Yes
Replace the OLP.No
Replace the outdoor control PCB .Yes
No
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