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Service diagnosis: electrical and/or adjustments – Scotsman CME1202 User Manual

Page 24

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SERVICE DIAGNOSIS: Electrical and/or Adjustments

SYMPTOM

POSSIBLE CAUSE

PROBABLE FIX

Nothing operates

Bin level control holding machine
off

Bin is full - use some ice.

Check ice level control circuit, see
page 26.

No Power

Reconnect power

High pressure control open

Reset, check machine

High temperature cut out open

Hot gas valve leaks thru, replace

P. C. Board Open

Replace board

Master switch open

Test/replace

Timer contacts open

Replace timer

Makes thick ice/freezes up

Harvest cycle too short

Adjust timer

Water inlet valve restricted

Clean or replace valve

Low water pressure

Check water filter or supply

Hot gas valve defective

Replace hot gas valve

Water reg. valve (water cooled)
leaks through

Replace water reg. valve

Low refrigerant charge

Locate leak, recover, repair,
replace drier, evacuate and weigh
in nameplate charge.

Air intake temperature too high
(air cooled)

Reduce room temperature

Sump covers out of position

Re-position sump covers

Cubes too small

Adjust cube size

Cube size control stuck open

Replace cube size control

Runs, makes no ice

Pump problem or water leak in
reservoir

Check water system and pump

Water inlet valve either lets in no
water or leaks through

Replace inlet water valve

Low refrigerant charge

Locate leak, recover, repair,
replace drier, evacuate and weigh
in nameplate charge.

Timer stuck

Replace timer

Relay does not energize; unit
stuck in harvest

Replace relay

Long freeze cycle

Water inlet valve leaks through

Replace inlet water valve

Dirty condenser

Clean condenser

Air intake temp. too high

Reduce room temperature

Water temperature too high

Advise user

Cubes too small

Cube size set wrong

Adjust cube size

Cubes size control stuck closed

Replace cube size control

Cubes too large

Water inlet valve leaks through

Replace inlet water valve and

adjust cube size control

CME1202 & CME1402

January 1995

Page 24

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