OPERATING INSTRUCTIONS
CO
2
/NH
3
CASCADE UNIT
250 - 1000 KW
52 _551511_om_kas_gbr_1_.doc
Failure Cause Remedy
The suction pressure is too low. Open all valves on the suction side of
the compressors.
The minimum pressure governor is
defective or set wrongly.
Remove the minimum pressure
governor, repair it, set it correctly or
replace it.
The compressors are shut off very
often by the minimum pressure
governor.
The heat transfer capacity of the
evaporator decreases.
Check the evaporator as to elevated
oil concentration, possibly drain oil
The unit/ cascade is extremely noisy
in operation.
The compressors or the drive motors
are defective.
Please, call Grasso Service for more
information
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