Scotsman C1448R Instrukcja Użytkownika Pobierz pdf (Strona 43)

Problem Likely Cause Probable Solution

Shut down on

maximum freeze time

Pump hose disconnected Check hose

Compressor not operating

Check compressor contactor,

check controller using test

mode

Check compressor start

components, check PTCR

resistance and temperature

Check compressor voltage

Check compressor windings

Low refrigerant charge

Add some refrigerant and

restart unit. If cycle time

improves, look for leak.

Hot gas valve leaks through

during freeze

Check hot gas valve for hot

outlet during freeze

Thermostatic expansion valve

bulb loose

Check bulb

Thermostatic expansion valve

producing very low or very high

superheat

Check evaporator superheat,

change TXV if incorrect

Compressor inefficient

Check compressor amp draw,

if low and all else is correct,

change compressor

September 2006 Page 43

Diagnostics – Air Cooled

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Scotsman C1448R Instrukcja Użytkownika Strona 43