14
Causes of overloading of general motors:
1) Artificial operational errors: such as self-adjustment of exhaust pressure, improper system
adjustment, etc.
2) Mechanical failure:
Such as the internal loss of the motor, motor under phase operation, safety valve non-action,
system setting failure, oil separator blocking and so on.
If the motor is found to be overloaded in operation, contact the manufacturer immediately and use
the phone or video to check and find out the cause, Prevent motor burning out loss too much.
3.3.2 Excessive protection of exhaust temperature
The maximum exhaust temperature set by the system is 105-110
℃
. If it exceeds, the power
supply will be cut off by the system itself. There are many reasons why the general exhaust
temperature is too high, but the most common cause is the failure of the oil cooler. If the air-
cooled oil cooler is blocked by dust, the lubricating oil will gradually rise and cause the high
temperature stop if the cold air can not pass freely through the cooler.
Therefore every once in a
while must use the pressure air to remove the heat dissipation fin on the dust
, if the fin on
the plug matter cannot blow clean, had better use the clean liquid or the volume agent to clean.
Water cooled air compressor is generally due to cooling copper pipe fouling blockage resulting in
reduced heat transfer efficiency and high temperature tripping. The highest ambient temperature
of air compressor design is 45
℃
. If the ambient temperature is higher, the exhaust temperature
is higher. Therefore, it is necessary to choose a place with low ambient temperature and good
ventilation to place the air compressor. When the intelligent controller detects that the
temperature exceeds the set value, the power supply is cut off automatically. The system cannot
be booted again at this time unless you reset it once. In order to avoid overheated shutdown as
far as possible, the system is equipped with an early warning device. When the exhaust
temperature reaches 100-105
℃
, the controller will issue a warning signal to alert the operator.
3.3.3 High exhaust pressure protection.
When the exhaust pressure of the system exceeds the rated exhaust pressure 0.5bar, the power
supply will be cut off by the system itself. When the volume of air is zero (the valve is closed)
and the discharge is less than the intake, the pressure of the system will rise rapidly and cause the
Summary of Contents for Quan Wei
Page 1: ...TaiWan QuanWei Screw type air compressor Using and Maintenance Instructions ...
Page 12: ...8 ...
Page 81: ...77 ...
Page 82: ...78 8 2 2 QWL 15A 20A 8 2 3 QWL 30A 40A ...
Page 83: ...79 8 2 4 QWL 50A 60A ...
Page 84: ...80 8 2 5 QWL 75A 100A ...
Page 85: ...81 8 2 6 QWL 150A 175A ...
Page 86: ...82 9 0 Circuit diagram ...
Page 87: ...83 9 1 MAM 860 880 Circuit diagram 9 2 MAM 890 Circuit diagram ...
Page 88: ...84 9 3 MAM 6080 Circuit diagram ...
Page 89: ...85 Screw Air Compressor operation record tale ...
