1. Kutuluka kwa evaporator nthawi zambiri kumachitika. Kutayikira ndi chinthu chovuta chodziwika bwino cha ma evaporator, ndipo muyenera kusamala kuti muzindikire kutayikira pafupipafupi mukamagwiritsa ntchito.

Pamene evaporator ya ammonia ikutha, imakhala ndi fungo lopweteka, ndipo palibe chisanu pa malo otayira. Pepala loyesera la Phenolphthalein lingagwiritsidwe ntchito poyang'ana kutuluka, chifukwa ammonia ndi alkaline, imakhala yofiira ikakumana ndi pepala loyesa la phenolphthalein.Mukachiyang'ana, nthawi zambiri chimakhala podontha pomwe mulibe chisanu mu evaporator. Mutha kugwiritsanso ntchito madzi a sopo kuti mupeze kudontha pakutha.

2. Yang'anani momwe mpweya umazizira kwambiri. Pamene chisanu ndi chokhuthala kwambiri, chiyenera kusungunuka pakapita nthawi. Pamene chisanu sichikhala chachilendo, chikhoza kuyambitsidwa ndi kutsekeka, ndipo chifukwa chake chiyenera kupezeka ndikuchotsedwa nthawi.

3. Pamene evaporator yatha kwa nthawi yayitali, ndibwino kuti mugulitse firiji mu accumulator kapena condenser ndi kusunga mphamvu ya evaporator pafupifupi 0.05MPa (kuthamanga kwa gauge). Ngati ndi evaporator mu dziwe lamchere, liyenera kutsukidwa ndi madzi apampopi. Mukatha kutsuka, mudzaze dziwe ndi madzi apampopi.