When the air conditioning refrigeration system in the data center room is running, the high pressure controller of the room air conditioning is set to an appropriate pressure value. When the high pressure value of the room specific constant temperature and humidity precision air conditioning reaches this limit during operation, a high pressure alarm is generated, causing the operation to stop.
At this point, if you want to restart the air conditioning compressor in the computer room, you must manually reset it. Before pressing the reset button, what we need to do is to identify the cause of the high pressure, so that the dedicated constant temperature and humidity precision air conditioning in the computer room can operate normally without any hidden dangers.
So what are the reasons for high voltage alarms：
(1) The high pressure setting of the air conditioner is incorrect. (2) When it is very hot in summer, excessive use of Freon refrigerant can cause high pressure exceeding the limit. (3) Due to long-term operation, dust and oil dust in the environment deposit on the surface of the condenser of the precision air conditioner with constant temperature and humidity for the computer room, which reduces the heat dissipation effect; (4) Fault in the axial fan motor of the air conditioning condenser in the computer room (5). The low voltage of the power supply for the dedicated constant temperature and humidity precision air conditioning in the computer room resulted in insufficient output voltage of the 24V transformer; The 24V AC contactor inside the condenser cannot work. (6) There may be residual air or other non condensable gases in the air conditioning system of the computer room. (7) The P66 center pressure block contact of the air conditioner is loose (8) MINSPEED or F. for precision air conditioning with constant temperature and humidity specifically designed for computer rooms V. The S setting is incorrect. (9) The fan bearing of the air conditioner is faulty, making abnormal noises or getting stuck.
Troubleshooting of high pressure alarm for computer room air conditioning:
(1) To readjust the set value to 350PSI and check the actual start stop value; (2) We need to discharge excess Freon refrigerant from the system and control the high pressure between 230psi and 280psi. (3) Clean the surface dust and dirt of the condenser in a timely manner, but be careful not to damage the copper pipes and fins. (4) Thoroughly check the static resistance and grounding resistance of the axial fan. If the coil is burnt out, it should be replaced. (5) To solve the power supply voltage problem here, it is necessary to install a grid stabilizer if necessary. (6) When there is a small amount of air mixed into the air conditioning system of the data center room, some gas can be discharged from a high position in the system. If necessary, the system can be vacuumed and filled with fluorine again. (7) We need to readjust the MINSPEED or F. of the outdoor unit V.S。 (8) If necessary, we need to replace the P66 speed controller. (9) If necessary, we need to replace or modify the outdoor fan condenser, which is the main method to fundamentally solve the high pressure of precision air conditioning with constant temperature and humidity for computer rooms.