Mitsubishi Electric PUZ-ZM60VHA, Руководство по обслуживанию

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50
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
expansion 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
discharging pressure.
• Replace linear expansion valve.
2
• If refrigerant leaks, discharging
temperature rises and LEV opening
increases.
Inspect leakage by checking the
temperature 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
temperature rises and discharging
pressure increases. Check if heat
exchanger is clogged by inspecting
discharging pressure.
•
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
temperature adjuster is turned on.
2
For 3 minutes after temperature
adjuster turns on, the compressor
will not stop operating even if
temperature 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
OCH653