Scotsman CMS1202R Instrukcja Obsługi Pobierz pdf (Strona 23)

SERVICE DIAGNOSIS: Refrigeration and/or Mechanical

SYMPTOM POSSIBLE CAUSE PROBABLE FIX

Poor harvest Hot gas valve does not open Check for power to the coil, check for

not opening, replace

Head pressure control valve does not

maintain enough head pressure.

Replace head pressure control valve.

Unit cycles off during freeze or

harvest

Hi temperature switch opens and

closes

Hot gas valve leaks thru, replace it

Low capacity High head pressure, from dirty

condenser, faulty fan motor

Clean condenser, repair fan motor

Non condensable gas in the system Purge system, evacuate and weigh in

nameplate charge

Extreme hot location Relocate the cabinet

Overcharge of refrigerant Evacuate and weigh in nameplate

charge

Hot gas valve leaks thru At the end of the freeze cycle there

should be frost on the evaporator end

of the hot gas tubes, if not replace the

hot gas valve

Liquid and discharge lines are in

contact with each other

Separate and insulate them

Unit shuts off before bin is full Bin Ice level control is set to “Partial” Move bin Ice level rocker switch to

“Full”.

Compressor cycles on and off Low pressure control opening and

closing

Check low side pressure, liquid line

valve must open and low side

pressure raise over 35 PSIG before

pump down control will close to run

compressor

Compressor overheats TXV not letting enough refrigerant

into evaporators, adjust or replace

TXV

Mechanical fault with compressor,

replace compressor

Frost on compressor Some frost will not hurt Do nothing

TXV meters too much refrigerant Adjust or replace TXV

CMS1202R

September 1993

Page 23

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