Central air conditioning failure P1, cooling water pump water flow switch protection how to deal with
Cooling water flow switch is generally the target type, the flow switch of the target in the installation of its improper position, the flow of instability is easy to break, there will be water flow failure, simple treatment is to replace the target, to put an end to Then put the water switch to the elbow from the elbow 5 times the diameter of the flow straight on the straight pipe section.
The new system may be the flow switch is not installed or installed anti-or line is not connected, the old system suddenly occurred that is the target fragment or off
Emergency approach: first look at the cooling tower there is no water, water full of dissatisfaction, according to a replenishment of water float valve, to see if it is not good, make up no water, open the cooling water pump, the water pipe does not turn, water Flow is enough, if all normal, you can first cool water flow switch wiring shorted. Boot. Etc. can be shut down, and then check the water switch, replace or repair. If there is no water, or water pump no water flow, on the water, exhaust, check the valve, check the backup pump check valve.
Note: Short cooling water flow switch, if no water boot, the unit will be high pressure protection, or compressor overheating protection, compressor overcurrent protection, if these protection failure, it will burn the compressor.
Do not short the chilled water flow switch, if the chilled water no water flow, the unit evaporator in tens of seconds or a few minutes to wear ice brace.
The pump is working abnormally, the filter is dirty or the target flow is abnormal.
Suggested approach:
????? 1, close the central air conditioning unit and pump power, remove the water system on the pipeline after the filter clean and then back to:
????????? When the water system pipe water filter in the dirty when the block will lead to water flow becomes smaller, lack of water flow central air conditioning host will protect the shutdown alarm.
????? 2, the water system piping all the water into a new tap water, from the pipeline at the lowest point of the sewage outfall in the pipeline of dirt;
????? 3, if it is cooling water pipe water flow alarm, it is recommended to cooling tower, tank / pool synchronized clean;
????? 4, do not open the central air conditioning unit, a single pump to start power supply, check the pump noise and operating current value is within a reasonable range, whether there is a clear exception, if the noise is obvious or pump jitter, you can adjust the pump outlet pipeline Opening degree
????? 5, check the water switch electrical circuit with or without abnormalities, check the central air conditioning unit system refrigerant abnormalities.
