CPS FX1234, Service Manual, Page: 38 / 57

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3. High Pressure Switch Service and Replacement
Danger:
Only a qualified service technician should service this equipment. An Electrical Shock hazard is present
which could lead to severe injury or even death.
Danger- Avoid breathing refrigerant vapors and lubricant vapor or mist. Breathing high concentration levels may
cause heart arrhythmia, loss of consciousness, or even cause suffocation.
Caution- all hoses may contain liquid refrigerant under pressure. Contact with refrigerant may cause frostbite or other
related injuries. Wear proper personal protective equipment such as safety goggles and gloves. When disconnecting any
hose, please use extreme caution.
Caution- avoid breathing refrigerant vapors and/or lubricant mist. Exposure may irritate eyes, nose, throat, and skin.
Please read the manufacturers Material Safety Data Sheet for further safety information on refrigerants and
lubricants.
Danger: Always assume that high-pressure refrigerant exists. Failure to do so may result in bodily injury.
Disconnect power supply to the
FX134A / FX1234 / FX3030
Series.
a. Service Access: Please see Section 1 parts 2&3
b. Close ball valve on tank vapor hose and disconnect to release pressure from hose and hi side manifold block
c. Using ohm meter check the switch. The switch should be closed with no pressure on it.
c. Remove high pressures switch from hi side manifold block and replace.
Check the switch with OHM meter. The switch
should be closed with no pressure on high side
block.