Foster Cold-Room Technicians Hand Book - Nccvmtc.org

F) COLD ROOM PANEL / UNITPower supply( either from MAINS or GENRATOR) is available at R-O, outlet terminals ofgenerator – panel , but UNIT not working.1 . Check if switch B1 is OFF – if OFF – put it ON2. Check supply voltage at terminal outlet 1-2 (for UNIT-1, selector b3at position1) & 3-4 (for Unit 2, selector b3 at position -2) If notavailable- notify . Maintenance enginer.If ON3 . Check switch ‘S1’ and Circuit – Breakers CB1, CB2 on selected unit if OFF Put ONIf ON4 . Observe the following :• Power neon should glow• Evaporator fan should runAnd• If cold room temp is higher then pre set – and also if not in defrost cycle, compressor,cond fan should run and refrigeration neon should glow – if not – NOTIFYMaintenance Enginer.NOTE : If all the above are working but yet, no cooling is obtained, observe the “sightglass”in the unit, if you can see the liquid gas. If no ges is observed or, only bubblesare observed – Refrigerant must have leaked out from the system.NOTE : Repeat steps 3 & 4 above, with the other unit also. By selecting the same withselector b3 on cold – room panel and NOTIFY OBSERVATIONS TO MaintenanceEngineer.G) . BATTERY DOES NOT SET CHARGECheck fuses , S1,S3,S4. If no changing is observed even after that, notifyMaintenance Engineer.36