A vortex air conditioner like a Nex Flow Panel Cooler is probably the most reliable type of system you can use in air conditioning control panels as it operates only using compressed air. They offer many advantages as explained in ths previous Linked In article:
But in some environments the cost of the compressed air may outweigh other costs and traditional air conditioners may be more economical to use. But since control panels create a “downtime cost” if overheating due to air conditioner failure, it can be worthwhile to install a vortex air conditioner as a low cost “backup” unit to avoid costly shutdowns.
As a backup however it is important that the control panel is relatively sealed to avoid the entrainment of hotter and more moist outside air. A thermostats and solenoid valve can easily and automatically turn the unit on should the main air conditioner fail. Once the ill-fated electrical air conditioner is repaired and running, the thermostat control will shut down the vortex system which will remain in standby mode until needed again.
A simple, low cost way to add security to any control panel that requires air conditioning to maintain secure and on going factory operations.