41
Installation and Maintenance
Service Manual
Electrical Safety Precautions:
7. Notes for Installation and Maintenance
Safety Precautions:
Important!
Please read the safety precautions carefully before
installation and maintenance.
The following contents are very important for installation
and maintenance.
Please follow the instructions below.
●The installation or maintenance must accord with the
instructions.
●Comply with all national electrical codes and local
electrical codes.
●Pay attention to the warnings and cautions in this
manual.
●All installation and maintenance shall be performed by
distributor or qualified person.
●All electric work must be performed by a licensed
technician according to local regulations and the
instructions given in this manual.
●Be caution during installation and maintenance. Prohibit
incorrect operation to prevent electric shock, casualty and
other accidents.
1. Cut off the power supply of air conditioner before
checking and maintenance.
2. The air condition must apply specialized circuit and
prohibit share the same circuit with other appliances.
3. The air conditioner should be installed in suitable
location and ensure the power plug is touchable.
4. Make sure each wiring terminal is connected firmly
during installation and maintenance.
5. Have the unit adequately grounded. The grounding wire
cant be used for other purposes.
6. Must apply protective accessories such as protective
boards, cable-cross loop and wire clip.
7. The live wire, neutral wire and grounding wire of power
supply must be corresponding to the live wire, neutral
wire and grounding wire of the air conditioner.
8. The power cord and power connection wires cant be
pressed by hard objects.
9. If power cord or connection wire is broken, it must be
replaced by a qualified person.
Warnings
Part
Ⅱ
: Installation and Maintenance
10. If the power cord or connection wire is not long enough,
please get the specialized power cord or connection wire
from the manufacture or distributor. Prohibit prolong the wire
by yourself.
11. For the air conditioner without plug, an air switch must
be installed in the circuit. The air switch should be all-pole
parting and the contact parting distance should be more than
1/8 inch.
12. Make sure all wires and pipes are connected properly and
the valves are opened before energizing.
13. Check if there is electric leakage on the unit body. If yes,
please eliminate the electric leakage.
14. Replace the fuse with a new one of the same specification
if it is burnt down; dont replace it with a cooper wire or
conducting wire.
15. If the unit is to be installed in a humid place, the circuit
breaker must be installed.
To ensure safety, please be mindful of the following precautions.
●When installing or relocating the unit, be sure to keep the
refrigerant circuit free from air or substances other than the
specified refrigerant.
Any presence of air or other foreign substance in the
refrigerant circuit will cause system pressure rise or
compressor rupture, resulting in injury.
●When installing or moving this unit, do not charge the
refrigerant which is not comply with that on the nameplate or
unqualified refrigerant.
Otherwise, it may cause abnormal operation, wrong action,
mechanical malfunction or even series safety accident.
●When refrigerant needs to be recovered during relocating or
repairing the unit, be sure that the unit is running in cooling
mode.Then, fully close the valve at high pressure side (liquid
valve).About 30-40 seconds later, fully close the valve at
low pressure side (gas valve), immediately stop the unit and
disconnect power. Please note that the time for refrigerant
recovery should not exceed 1 minute.
If refrigerant recovery takes too much time, air may be
sucked in and cause pressure rise or compressor rupture,
resulting in injury.
●During refrigerant recovery, make sure that liquid valve and
gas valve are fully closed and power is disconnected before
detaching the connection pipe.
If compressor starts running when stop valve is open and
connection pipe is not yet connected, air will be sucked in
and cause pressure rise or compressor rupture, resulting in
injury.
●When installing the unit, make sure that connection pipe is
securely connected before the compressor starts running.
If compressor starts running when stop valve is open and