During the use of refrigeration compressors, some failures cannot be avoided, so how do we repair these failures? Next, let's take a look at the classification of refrigeration compressor repair and failure. and how to solve it?

1. The oil pressure of the compressor is not adjusted to high fault causes and repair methods:

1. The oil pressure regulating valve fails, disassemble the oil pressure regulating valve to check.

2. The bearing clearance is too large, repair or replace.

3. If the oil filter is blocked, first use the rotary vane filter by hand. If it is invalid, discharge the crankcase oil, check the oil filter in the crankcase and clean it.

Second, the compressor can not start the cause of failure and repair method:

1. The electrical line is faulty, check and repair it.

2. The differential pressure relay is disconnected, and the high-voltage circuit breaker is disconnected. Press the reset button of the differential pressure relay and wait for the pressure change to close the contact or adjust the disconnecting pressure from the beginning.

3. Failure causes and repair methods of refrigeration compressor unloading protection equipment:

1. The oil pressure is not good, adjust the oil pressure to 0.15-0.3Mpa.

2. The oil pipe is blocked, disassemble and clean.

3. There is dirt stuck in the oil cylinder, disassemble and clean.

4. The cause of the failure and the repair method of the compressor that stops working soon after starting:

1. If the oil pressure is too low, use the oil pressure regulating valve to increase the oil pressure. If it cannot be increased, check and repair it according to the serial number 8.

2. The setting value of the oil pressure difference relay is too high, adjust it from scratch.

5. Causes and repair methods of high exhaust temperature of compressors:

1. The inhaled gas is too hot, adjust the expansion valve.

2. Compressor failure:

(1) The exhaust valve plate is broken, and the cylinder head is opened.

(2) The safety bypass valve is leaking, check the exhaust valve sheet for inspection or proofreading.

Sixth, the compressor has noise failure reasons and repair methods:

1. If the foundation bolts are loose and oscillate, tighten the foundation bolts.

2. Too much oil forms liquid slam, check the oil level.

3. The working fluid enters the gas valve to form a liquid hammer, and the expansion valve is closed down or temporarily closed.

4. Refrigeration compressor failure:

(1) When working, the piston hits the exhaust valve, and the cylinder head with noise is opened to check whether the bolt of the exhaust valve is loose.

(2) If the valve plate is damaged, replace it with a new one.

(3) Bearings are worn, repair or replace with new ones.

Seven, the oil consumption of the compressor increases the failure cause and repair method:

1. The working fluid enters the crankcase, and the expansion valve is closed or temporarily closed.

2. The oil return pipe of the oil separator is blocked, check the oil return pipe and clean the filter.

3. The piston ring, oil ring or cylinder of the compressor is worn, check and replace if necessary.

Eight, the condensing pressure is too low failure causes and repair methods:

1. The condenser tube is blocked by mud or scale. Clean the condenser.

2. There are too many working fluids in the system, and the remaining working fluids are removed.

3. If the cooling water is too much or too cold, adjust the water supply.

4. Refrigeration compressor failure:

(1) The exhaust valve is leaking, replace it with a new one if necessary.

(2) If the unloading equipment fails, check that the oil pressure should be 0.15-0.3Mpa higher than the suction pressure. If it is normal, stop and check the unloading equipment that fails.

9. Causes and repair methods of high condensing pressure failure:

1. If there is air or other non-condensable gas in the refrigeration system, release the non-condensable gas.

2. The water cooling water is insufficient or too hot, check whether the water valve is open and whether the water filter is blocked, and try to reduce the water temperature and increase the water flow.

10. Reasons and repair methods for low suction pressure failures:

1. If the liquid pipe, expansion valve or suction filter is blocked, disassemble and clean after vacuuming.

2. There are too few working fluids in the system, make up for the working fluids.

3. Too little liquid passing through the expansion valve, adjust the expansion valve.

4. There is too much oil in the system, find out the part where the oil accumulates in the system and release the oil.

11. Reasons and repair methods for high suction pressure failure:

1. There is too much liquid passing through the expansion valve, adjust the expansion valve.

2. The oil return valve of the oil separator is opened too large, and the oil return valve should be properly closed.

3. Compressor failure:

(1) The suction valve is leaking, open the cylinder head to check the suction valve, and replace it with a new one if necessary.

(2) If the unloading equipment fails, check that the oil pressure should be 0.15-0.3Mpa higher than the suction pressure. If it is normal, stop and check the unloading equipment that fails.