Haier AS25THMHRA-C Service Manual page 344

1.2 Safety Cautions
Be sure to read the following safety cautions before conducting repair work.
The caution items are classified into "Warning" and "Caution". The "Warning" items are especially important
since they can lead to death or serious injury if they are not followed closely. The "Caution" items can also lead
to serious accidents under some conditions if they are not followed. Therefore, be sure to observe all the safety
caution items described below.
About the pictograms
△ This symbol indicates an item for which caution must be exercised.
The pictogram shows the item to which attention must be paid.
○ This symbol indicates a prohibited action.
The prohibited item or action is shown inside or near the symbol.
● This symbol indicates an action that must be taken, or an instruction.
The instruction is shown inside or near the symbol.
After the repair work is complete, be sure to conduct a test operation to ensure that the equipment operates
Normally, and explain the cautions for operating the product to the customer.
1.2.1 Embedded wire checking before installation
Check the embedded wire diameter suitable to request:
(Power supply from indoor: 2.5kw ≥1.0mm
2
≥1.0mm )
Check the embedded wire are four roots, L/N/COM/GND; GND is needed, if
from power grid will impact to the performance
Using a multi-meter to test short circuit of the four roots wires, make sure no short circuit happen.
1.2.2 Caution in Repair
Warning
Be sure to disconnect the power cable plug from the plug socket before disassembling the equipment for
a repair.
Working on the equipment that is connected to a power supply can cause an electrical shook.
If it is necessary to supply power to the equipment to conduct the repair or inspecting the circuits, do not
touch any electrically charged sections of the equipment.
If the refrigerant gas discharges during the repair work, do not touch the discharging refrigerant gas .The
refrigerant gas can cause frostbite.
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●
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2 2
3.5kw,5kw ≥1.5mm 7kw ≥1.0mm
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2
Intuoduction
2
; Power supply from outdoor
not, thunder or high voltage wave
Domestic air conditioner