When the high and low temperature
recirculation chiller system is in use, what is the general cause if the high
temperature cannot be reduced? How should we deal with such failures?

First, let’s analyze the
principle and method of cooling. The circulating heat transfer medium is
different. Generally, the high and low temperature cooling system industry
mostly uses direct cooling, while the high and low temperature recirculation
chiller system mostly uses indirect cooling with internal installation. There
are devices such as plate heat exchangers or oil coolers. The heat medium and
cooling water source in the system exchange heat in the heat exchanger to
reduce the temperature of the medium.

Generally, we conduct investigation and
maintenance from the following aspects:

1. The cooling solenoid valve is damaged:
it is necessary to check whether the solenoid valve coil can work normally, if
it is damaged, it needs to be replaced; the panel does not output a cooling
signal, carefully check the circuit or use the component replacement method to
check.

2. Circuit failure: Check the circuit part
of the system, the cooling water inlet or outlet pipeline is blocked: check
whether the valve in the cooling water pipeline is fully opened, and ensure
that the flow and pressure of the cooling water are sufficient, and the heating
contactor is stuck, Always heating: observe the pull-in state of the contactor,
and worsen damaged electrical parts.

In addition to troubleshooting the above
several possible causes of failure, we also need to check whether the cooling
plate is replaced or the cooling exchanger is blocked. The advantage of using
indirect cooling is that it has high temperature control accuracy and strong
adaptability. It can be applied to the temperature control of high and low
temperature recirculation chiller systems, and because the heat transfer medium
is cooled first, the cooling impact on the temperature control equipment is
relatively relatively large. Of course, the disadvantage is that the cooling
speed is relatively slow, and the price is more expensive than the direct
cooling method.

If you can’t solve it by yourself, you need
to contact the manufacturer of the high and low temperature recirculation
chiller system to solve it in time to avoid delays and increase costs.