High Temperature Protection Of Compressor Top Diagnosis And Solution - Kaisai KFU-09HRDN1-QRC8W Service Manual

9.2.10 High temperature protection of compressor top diagnosis and solution(P2)
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 unit can
start normally.
Yes
Check if the refrigerant
charge volume is normal?
Yes
Refrigerant system is blocked, such
as capillary or welded point of pipes.
Clear up the air inlet and outlet or the heat
Yes
exchanger of indoor and outdoor units.
Check if all the connection, especially
No the connection of OLP (Over Load
Protector) sensor is good.
Measure the resistance
between the two ports of
the OLP. Is it zero?
No
Recharge the correct
refrigerant volume.
No
Yes
No
Yes Replace the outdoor control PCB.
63
Correct the connection.
Replace the OLP.