Scotsman C1448R Manual de usuario descargar pdf (Pagina 53)

Shut Down on

Maximum Freeze Time

(continued)

Compressor not operating

(continued)

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

Debris in refrigeration system

Recover charge. Open quick

connects, check for loose or

missing foil. Open liquid line

and hot gas valves. Check for

debris.

Replace drier, evacuate and

weigh in nameplate charge.

Shut down on

maximum harvest time

Ice bridge thickness too small,

not enough ice to open curtain

Check and adjust if needed

Ice bridge thickness too large,

ice frozen to evaporator frame

Check and adjust if needed

Purge valve does not open,

water melts ice bridge, not

enough ice to open curtain

Check purge valve

Incomplete ice formation

Check water distributor for

partially plugged holes

Curtain out of position

Check curtain for swing

restriction

September 2006 Page 53

Problem Likely Cause Probable Solution

Diagnostics - Remote Air Cooled

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