Yuchai YC310LC-8, Operation Manual

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Air Conditioning
The machine is equipped with the air conditioning device in the cab, and its operation knob is on the left
control box in the cab.
As to the specific operation and maintenance of the air conditioning system, you can not only refer to
this operation manual, but also the Air conditioning operation manual attached to this machine.
1. Precautions for the air conditioning maintenance
1) If the graphics flicks on the manipulation screen, then the cooling system pressure has failure.
The compressor does not work and the system cannot cool down, when you should find a
professional to repair.
2) Automatic shutdown after the starting (the manipulation screen goes off after going on) or the
graphics flicking (about 5 minutes) shows that non-normal power failure is occurring or non-
normal power failure has occurred at the beginning of last starting (for example, turn off the power
switch without turning off the air conditioning control power, insurance is burned in the process of
the starting the air conditioning, power cable connection is poor, etc.). At this point, if the graphics
stop flicking 5 seconds after starting, then the air conditioning can be used continually; if you
cannot boot or it automatically shut down after the boot, and then check whether the air
conditioning power supply circuit is open, or the connection is bad.
3) To protect the compressor, the compressor start interval is set for 15 seconds in this machine, so if
the time of choosing cooling from the last cooling choice time is less than 15seconds, it is normal
that the compressor does not run. After the interval of 15 seconds, the air conditioning system will
automatically accept your instructions of cooling.
4) Air conditioning air filter box assembly must be cleaned regularly once a month, otherwise dust and
dirt can clog the network, and the indoor air cannot smoothly go through the heat exchanger,
affecting the effectiveness of the air conditioning.
5) In special conditions (such as wet, the not very hot environment, the use of outside air circulation,
low-speed blower running, dirty and clogging air filter, return air blockage, etc.), if you use the
strong cooling for a long time, you will sometimes feel the wind is smaller and smaller, or even
almost no wind, which is the performance of air conditioning evaporator frost. The frost on the
evaporator blocks the air circulation flow channel, making the cooling effect if poor. However, this is
not a fault. As long as you suspend the cooling, remove the dirty block and select the wind, then a
few minutes later, choose the cooling, it can return to normal. After returning to the normal use, do
not select wind, strong cooling, and outer loop at the same time, for example, you can select the
weak cooling or the middle cooling.
6) When using the heating system in the winter, you should wait the engine water temperature has
increased before use.
7) Heating core tank is connected with the engine water tank, so once the heating core leaks, the
water tank will be lack of water, making the engine overheating. In the winter, to prevent the coolant
from freezing is as important as to protect the water tank from cracking. To prevent the coolant
freezing leading to the cracking of the heating core tank and the water tank, please use the
specified coolant. Because in winter, the coolant may freeze easily, if necessary, if the standby time
is long, please let the coolant out. Please note: heating core tank cracking in the winter is not within
the scope of “three guarantees”. In addition, the heating core tank corrosion and leakage, warm
water valve damage due to the coolant that is not in accordance with the requirements of the
manufacturer are also not within the scope of “three guarantees”.
8) Refrigerant easily frostbites the skin, especially the eyes; in addition, it will emit toxic phosgene in
case of meeting the open fire. Therefore, under any situations that the cooling system needs to be
demolished, please recover the refrigerant before disassembling the cooling system. The whole
process should be free from flame!
9) When the cooling system is not used for a long time, it should be run every half a month for 5-10
minutes each time.
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