96
Test Operation, Troubleshooting and Maintenance
Replacement of the electric expansion valve
Note: check the whole system, pipelines and electric lines, cut off power supply and reclaim
refrigerant before replacement.
Steps Image Instructions
5. Replace it with a
new one.
• Solder pipes.
• Do charge nitrogen during soldering.
• Protection measures should be
taken during soldering to prevent
surrounding objects from being burnt
out.
6. Tighten coils,
pipe clamps and
rubber pads;
vacuum the system;
recharge refrigerant
and then put back
the panel.
• The bulge of the coil should match
with the recess of the main body of
the valve.
• Keep the vacuum degree to -1.0bar.
Vacuuming period would be longer
for the repaired unit.
• Charged refrigerant should be
the same as that stated at the
nameplate.
• Power off the unit and then power it
on again.
• Put back the panel.
Replacement of vapor-liquid separator
Note: properly reclaim refrigerant, prepare tools and keep good ventilation.
Steps Image Instructions
1. Remove front
panels.
• Remove screws at the front panel.
• Loosened screws should be put
together to
avoid loss.
• Pull the front panel upwards and
then remove it.
• Properly keep the removed front
panel to avoid from being damaged.
• Note: there are two clasps at each
panel for connecting with side
panels.
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