Table of Contents
Advertisement
MFI2406LS
SERVICE DIAGNOSIS
Symptom
No ice is made, nothing
operates
No ice, auger motor is
turning
Unit makes ice, but very
slowly
Possible Cause
Unit off due to no power.
Unit off due to master switch in Off position
Unit off due to low water level in reservoir
Unit off due to ice level sensors
(photo-electric eyes) blocked
Unit off due to scale on water level sensor
Auger motor hums but does not turn
Auger turning but there is no refrigeration
effect
Unit is shut down
Auger not turning
Low suction pressure
No power to circuit board
Circuit board gear motor relay will not close Check / replace board
Water level or ice level sensor failed
Liquid line valve coil is open
Circuit board relay will not close
High discharge pressure because of dirty
condenser
Auger and evaporator are coated with
minerals
Low suction pressure due to low EPR
setting
Page 18
Probable Correction
Restore power
Move master switch to ON
Check water supply, filter and
float valve.
Check/clean ice level sensors
Clean water level sensor
Auger can't turn. Circuit board
has not yet shut unit down.
Liquid line valve not opening,
check coil, check board relay.
No refrigerant to ice machine,
check main system.
Circuit board has shut ice
machine down due to high auger
motor amp draw. Check for
cause of high amp draw,
including bearings, gear motor
condition and scale on auger &
evaporator. May also be due to
liquid line valve leak thru during
the off cycle. Check valve.
Due to: motor failure; auger relay
failure on circuit board; or gears
stripped. Check drive train.
Liquid line valve not opening due
to coil failure or failure of
compressor relay on circuit board
EPR setting too low, check/adjust
TXV restricted or not metering.
Check bulb temperature.
Check harness
Check / replace sensor
Check / replace valve coil
Check / replace board
Clean condenser.
Clean the water system
Adjust EPR, check TXV
superheat
Advertisement
Table of Contents
