26
Phenomena
Factor
Countermeasure
7. Remote controller display works
normally and the unit performs
heating operation, however, the
capacity cannot be fully obtained.
1
Linear expansion valve fault
Opening cannot be adjusted well due to linear expan-
sion valve fault.
2
Refrigerant shortage
3
Lack of insulation for refrigerant piping
4
Filter clogging
5
Heat exchanger clogging
6
Air duct short cycle
7
Bypass circuit of outdoor unit fault
1
•
Discharging temperature and indoor heat
exchanger temperature does not rise.
Inspect the failure by checking discharg-
ing pressure.
•
Replace linear expansion valve.
2
•
If refrigerant leaks, discharging tempera
ture rises and LEV opening increases.
Inspect leakage by checking the tem-
perature and opening.
•
Check pipe connections for gas leakage.
3
Check the insulation.
4
Open intake grille and check the filter.
Clean the filter by removing dirt or dust on
it.
5
•
If the filter is clogged, indoor pipe tem-
perature rises and discharging pressure
increases. Check if heat exchanger is
clogged by inspecting discharging pres-
sure.
•
Clean the heat exchanger.
6
Remove the blockage.
7
Check refrigerant system during operation.
8.
1
For 3 minutes after temperature
adjuster turns off, the compressor
will not start operating even if tem-
perature adjuster is turned on.
2
For 3 minutes after temperature
adjuster turns on, the compressor
will not stop operating even if tem-
perature adjuster is turned off.
(Compressor stops operating
immediately when turning off by
the remote controller.)
12
Normal operation
(For protection of compressor)
12
Normal operation
OCH525
