26
7.4.2 Poor cooling or heating phenomena.
NOTE:
“
”
Inapplicable for cooling-only type.
7.4.3 Over cooling or heating.
7.5 Sensor is defective (Check reference 3.4.9)
Check the set temperature.
Poor cooling
(heating)
performance
Is the temperature
set properly?
Change the set temperature.
The heating (cooling)
load is too large.
Reduce heat (cool) source or change
the air conditioner with large power.
Refrigerant
flow is not
enough
Refrigerant is not enough.
Capillary tube is blocked.
Compressor is in error.
Service valve is not open
completely.
Air circulating
capacity is
not enough.
The air filter is blocked.
4-way reversing valve fails.
Replace it
Fan running speed
is at “low”.
Change it to “high’ or
“medium”.
Connection between indoor
and outdoor units is in poor
thermal-insulated.
Wide and narrow tubes
are thermal-insulated
separately.
Cooling air -flow
4-way reversing valve is defective.
Cooling airflow
protector is no use
.
The pause indicator is on.
Replace the electric
controller of indoor unit.
Temperature sensor of
indoor coil is defective.
Replace the sensor.
No
Yes
Filling it.
Replace it.
Replace it.
Open it
completely
Clean it.
Replace it
