What Should Be Done When the Condenser Fan Doesn't Rotate During Operation?

If the pressures on both the high-pressure side and the low-pressure side are low (the high pressure is lower than 83 kPa and the low pressure is lower than 78 kPa), and there are bubbles in the sight glass at the same time, and the air from the air outlet is not cold, it indicates that the refrigerant in the system is insufficient. When the condenser fan does not rotate during use, you can first use a multimeter to check whether the coil of the fan motor is burned out. If the condition of the motor coil is good, you can check whether there are oil stains at the rear bearing of the fan motor. If there are no oil stains, it indicates that the sliding bearing is short of oil. When the refrigerant is insufficient and it is found that the cooling capacity of the air-conditioning system in the Shanghai cold storage is insufficient and it is suspected that the refrigerant in the refrigeration system is insufficient, the system pressure can be checked with a manifold pressure gauge.

Treatment method: When checking, the system pressure can be checked with a manifold pressure gauge. If the reading on the high-pressure gauge is relatively high, and at the same time, the fins of the engine radiator and the condenser fins in the Shanghai cold storage are full of dust and debris, it indicates that the condenser has poor cooling performance. Treatment method: Remove the dust and debris accumulated on the engine radiator fins and the condenser fins.

Find out the cause of the leakage, repair the leakage part, and replenish the refrigerant to the system. Make the engine run at 200 r/min.

When the bubbles disappear, the reading on the low-pressure side of the pressure gauge is about 118 - 216 kPa, and that on the high-pressure side is about 1274 - 1596 kPa. Poor cooling of the condenser The poor cooling of the condenser in the refrigeration system is mostly caused by the blockage of the engine radiator fins and the condenser fins by dust and debris.

During the installation and use of the cold storage, the condenser fan cannot rotate. Most of the reasons are that the shaft of the sliding bearing lacks lubricating oil, the bearing bush is burned out and seizes the shaft, or the coil of the fan motor is burned out. It may also be caused by the fan working for too long, with a large current, and the poor operation of the contacts of the air-conditioning relay, which burns out the output circuit on the printed circuit board.