WarningRefrigeration
CO2 Flash Tank / Receiver Pressure (Flash Gas Bypass) Fault
The intermediate flash-tank/receiver pressure drifts off target because the flash gas bypass (FGB) valve isn't controlling correctly, upsetting liquid feed to the cases.
Symptoms
- Flash tank / receiver pressure off setpoint (typically ~500-580 psi)
- MT suction pressure disturbed by bypass flash gas
- Cases starving or flooding across the whole rack
- FGB valve hunting or pegged open/closed
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