INSTRUCTION MANUAL-CoolSafe Freeze Dryersmodels
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5.6. Stopping the vacuum pump
Close the (external) vacuum valve and let the pump run for a minimum of 45 minutes after the freeze-drying
has ended. This is to avoid any possible condensates remaining in the pump oil.
If the freeze dryer is used regularly during the week, it is recommended that the vacuum pump runs
constantly with gas ballast valve open and the vacuum valve closed.
6. Alarms and errors
In case of alarms or errors, an alarm/error code will be displayed.
E_1: Error indicating that the temperature sensor has a short circuit.
E_2: Alarm indicating that the temperature during freeze-drying is above 20
o
C.
E_3: Error indicating that the temperature sensor is disconnected.
7. Maintenance
7.1. CoolSafe
The air-cooled condenser must be cleaned minimum twice a year. Use a vacuum cleaner and remove any
dust in the cooling grill on the front.
Rubber valves, black O-rings and valves on the manifold and O-rings on chambers should be greased with a
ultra thin layer of vacuum grease and wiped off with a soft cloth every 3-4 months.
The rubber must appear shiny, smooth and without cracks. All silicone gaskets needs only dust removal (do
not use any vacuum grease). If necessary clean with alcohol wipes.
7.2. Vacuum pump
See the vacuum pump instruction manual for maintenance according to supplier’s recommendation.
Maintenance for a vacuum pump in general will be to:
Check the oil volume and colour condition regularly. The oil should be changed every 400-500
working hours, more often if the pump has been exposed to aggressive vapors. Keep a Log book of
the usage.
Drain the oil mist filter if the oil level is more than 10 mm.
Drain, clean and eventually change the filter insert if smoke comes from the oil mist filter.
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