3. Switch on the power supply and reset the maintenance interval counter.
4. After approx. 10 minutes of operation: Switch off the machine and check visually for leaks.
10.18 Refrigeration Dryer Maintenance
The refrigeration circuit is fully hermetically sealed and needs no maintenance. Repairs may only
be carried out by certified personnel.
Material Compressed air for blowing out
Cleaning cloth
Vacuum cleaner
Spare parts (as required)
Fig. 31 Refrigeration dryer
1 Access panel
2 Sight glass: Condensate drain
3 Condensate drain
4 Refrigerant condenser
5 Screws
➤ Check and clean the refrigerant condenser and condensate drain regularly as described below.
10.18.1 Cleaning the refrigerant condenser
Precondition The supply disconnecting device is switched off,
the device is locked off,
the absence of voltage has been verified.
1. Undo the latch 5 and remove the panel 1 .
2. Use compressed air (<5 bar) to blow the condenser 4 through from outside to inside and then
vacuum up the dirt.
3. Replace the panel again.
10.18.2 Checking the condensate drain
The condensate drain opens automatically when enough condensate has collected.
One of the illustrated condensate drains is fitted according to compressor model (Fig 32).
10 Maintenance
10.18 Refrigeration Dryer Maintenance
80
Service Manual Screw Compressor
ASK T SIGMA CONTROL BASIC 9_5717 20 E