Overload Protection - Toyotomi KURO Mini Service Manual

4.2 Overload protection (window type, TTW, PTAC, portable type, recreational vehicle AC and
dehumidifier)
Main check points:
(1) Compressor (2) Refrigerant
(3) Whether the air inlet/outlet, heat exchanger and internal system is dirty and blocked
(4) Fan (5) Main board
noise or leakage occur? Is temperature
Start
Heat exchanger is too dirty,
or blocks the air inlet/outlet?
The rotate speed of fan
is abnormal, rotate speed is too low or
the fan is not functioning;
Is compressor
operation abnormal? Does strange
of outer casing too high?
Is the internal system
blocked (dirt blockage, ice blockage,
oil blockage, the 4-way valve is not
completely opened)?
Refrigerant leakage leads to
overheat protection of compressor
Replace with a new controller
with the same model
End
Clean the heat exchanger
and remove the plugs
Eliminate
malfunction
Check the fan, re-install
the fan to make it function
normally
Eliminate
malfunction
Check if there are any shelters near
the condenser, if yes, take them away;
check the component with abnormal
sound, replace the faulted component;
if the refrigerant is leaking, find out the
leakage point and supplement the welding
process or replace the broken component,
conduct vacuuming and perfusion
Eliminate
malfunction
If the capillary keeps defrosting, replace the
capillary component, conduct vacuuming
and perfusion; if the 4-way valve conducting
heating with heat pump has no reversing,
then replace the solenoid valve or 4-way
valve
Eliminate
malfunction
Find out the leakage point to supplement
welding or replace the broken component,
conduct vacuuming and perfusion again
Eliminate
malfunction