Do not do the welding work in the airtight or bad air circulation room.
When discharging the refrigerant, must keep the room good air circulation condition.
When cutting the suction pipe or discharging pipe of the compressor, pay attention to the
surplus refrigerant and internal pressure in cooling system pipe
2. Unplug the unit:
When you are ready to proceed the maintenance, must first unplug the freezer first to
ensure the safety.
3．Avoid electrical shock:
Normal when proceeding the maintenance, must open the power supply first. But if you
must check the field wiring or the component of the unit with power supply in, must be
very carefully and don’t touch the live parts. If you find out the wiring is aged, please
replace it in time.
4．Correct use the components:
If the component is damaged and need to be replaced, be sure to replace with the
component with same model，do not use other models or other brand components, and
not use the changed component.
5．Correct use the service tools:
Ensure to use the appropriate service tool right. Otherwise it will cause bad electrical
contact or loose fixing, and the incidence will happen.
6．Wiring connection:
When re-connecting the cut wire, be sure to use soldering method or terminal connection,
and then wrap the connection point with insulation tape, ensure the good connection.
7．Insulation resistance measure:
After completing the service and assembly，must use the multi-meter to measure the
insulation resistance, if it is greater than 1 million ohm, then you can plug on the unit.
8．Grounding test:
After maintenance, use the multimeter to measure the grounding resistance to ensure the
grounding resistance is less than 0.1 ohm.
9．Pay attention to the child or infant nearby:
When maintenance, don’t let the child or the infant nearby.
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