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SERVICE DIAGNOSIS

Symptom

Possible Cause

Probable Correction

No ice is made, nothing
operates

Unit off due to no power.

Restore power

Unit off due to master switch in Off position

Move master switch to ON

Unit off due to low water level in reservoir

Check water supply, filter and
float valve.

Unit off due to ice level sensors
(photo-electric eyes) blocked

Check/clean ice level sensors

Unit off due to scale on water level sensor

Clean water level sensor

Auger motor hums but does not turn

Auger can’t turn. Circuit board
has not yet shut unit down.

Auger turning but there is no refrigeration
effect

Liquid line valve not opening,
check coil, check board relay.
No refrigerant to ice machine,
check main system.

Unit is shut down

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.

Auger not turning

Due to: motor failure; auger relay
failure on circuit board; or gears
stripped. Check drive train.

Low suction pressure

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.

No power to circuit board

Check harness

Circuit board gear motor relay will not close

Check / replace board

Water level or ice level sensor failed

Check / replace sensor

No ice, auger motor is
turning

Liquid line valve coil is open

Check / replace valve coil

Circuit board relay will not close

Check / replace board

Unit makes ice, but very
slowly

High discharge pressure because of dirty
condenser

Clean condenser.

Auger and evaporator are coated with
minerals

Clean the water system

Low suction pressure due to low EPR
setting

Adjust EPR, check TXV
superheat

MFI2406LS

Page 18

Содержание MFI2406LS Series

Страница 1: ...Ice O Matic 11100 East 45th Ave Denver Colorado 80239 Part Number 9081358 02 17 3168 02 Date 10 08 SERVICE AND INSTALLATION MANUAL MFI 2406LS Series...

Страница 2: ...SERVICE PARTS MANUAL 22 INCH WIDE ICE SERIES CUBERS MODEL ICE0320 ICE0520 Includes 50Hz Units ICE O Matic 11100 East 45th Ave Denver Colorado 80239 Part Number 9081297 01 PD04 02 Rev1 05...

Страница 3: ...ART UP Page 7 COMPONENT IDENTIFICATION Page 8 COMPONENT DESCRIPTION Evaporator Page 9 CONTROL BOX Components Page 10 ELECTRICAL SEQUENCE Page 11 OPERATION Page 12 OPERATION Refrigeration Page 13 CLEAN...

Страница 4: ...ance They meet or exceed the standards of U L N S F and C U L Ice O Matic assumes no liability or responsibility of any kind for products manufactured by Ice O Matic that have been altered in any way...

Страница 5: ...ecommended for lifting the machine high enough to install on top of the bin Level the assembly by turning the leg levelers in or out Locate the Nameplate The nameplate is located on the back panel of...

Страница 6: ...ring diagram The ice machine should be connected to it s own electrical circuit and be individually fused Voltage when the unit is under full load must remain within the limitations listed on page 2 L...

Страница 7: ...e between the ice maker and the water supply Drain System All drains are of the gravity type and must have a minimum of 1 4 fall per foot of horizontal run The drains must be installed to conform to l...

Страница 8: ...en removed from inside the cabinet 6 Have the electrical connections been made 7 Have the drains been installed and checked for leaks 8 Has the refrigeration supply been installed and checked for leak...

Страница 9: ...egins to make ice Water flows from the water reservoir and the float drops letting in more water 7 Switch on the other master mode switch observe that The liquid line valve opens The gearmotor runs Wi...

Страница 10: ...easure the temperature of the evaporator outlet at the TXV bulb and check the low side pressure at the EPR valve Convert the pressure to temperature using a temperature pressure chart and subtract the...

Страница 11: ...ing action being where the two seal faces meet Ice Sweep A plastic cap with fingers It revolves with the auger to sweep the ice into the ice chute Divider Where the ice is compressed and much of the e...

Страница 12: ...elays are for the gear motor with a built in time delay to clear the evaporator of ice when the unit turns off and for the liquid line valve See photo below On Off Mode Switch Manual control for that...

Страница 13: ...occurs the bin full light glows and the machine shuts down Shut Down The compressor relay opens LED1 goes out The liquid line valve closes The refrigerant flow stops The auger motor stays on for 1 mo...

Страница 14: ...voir which it enters through the float valve The water then goes out the bottom of the reservoir tank to the bottom of the evaporator Reservoir overflow or evaporator condensation is routed to the dra...

Страница 15: ...lve The thermostatic expansion valve meters the liquid refrigerant into the evaporator where it boils off evaporates and absorbs heat It then moves through the ball valve and into the evaporator press...

Страница 16: ...solution has been added to the reservoir and the reservoir is nearly empty switch the master switch to OFF 11 After draining the reservoir as in step 6 wash and rinse the water reservoir 12 Go thru s...

Страница 17: ...ce chute and wipe the inside clean as illustrated 2 The ice machine senses water level by a probe located in the water reservoir At least twice a year the probe should be removed from the reservoir an...

Страница 18: ...ease is needed the bearing and breaker should be removed to check the action of the bearing It should rotate smoothly To remove the breaker take out all four allen head cap screws and pull the breaker...

Страница 19: ...Switch off electrical power and shut off the water supply For more information on removal of these parts see REMOVAL AND REPLACEMENT 1 To remove the auger remove front and top panel See Removal And R...

Страница 20: ...uding 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 Auger not turning Due to motor failure auger relay fai...

Страница 21: ...the seal leaks shut off the water remove the auger replace the water seal Check gear motor for water infiltration Uses too much water Reservoir float valve leaks thru Replace float valve or seat Exces...

Страница 22: ...e where the water sensor plugs into and place the other end in the water The water OK light should go ON If it does not replace the control board 3 Ice sensor check Is the Bin Full light Off If it is...

Страница 23: ...acket and remove reservoir from ice maker 8 Reverse to reassemble BIN CONTROLS Ice Level Sensors 1 Disconnect electrical power 2 Remove front panel 3 Remove control box cover 4 Locate ice chute at the...

Страница 24: ...damage a The bearing is pressed into the breaker to remove the bearing and replace it an arbor press is needed b Replace lower seals before installing new bearing in breaker Note seals must be pressed...

Страница 25: ...rews holding breaker to evaporator d Lift up and remove breaker from evaporator e If the auger is stuck use a slide hammer type puller to pull on the auger at the threaded hole The size of that hole i...

Страница 26: ...wn against it 3 The part of the water seal that rotates with the auger must also be replaced Remove the old part from the auger and clean the mounting area 4 Place a small bead of food grade silastic...

Страница 27: ...Water Seal sweat in the new evaporator at the old connections 6 Install an new drier in the liquid line 7 Evacuate the system until dehydrated then weigh in the nameplate charge Check for leaks 8 Ins...

Страница 28: ...quickly check the gears and bearings They are likely to be fine if the oil is If there is evidence of water in the oil rusty bearings and gears the oil having a creamy white appearance oil level too h...

Страница 29: ...MFI Series Wiring Diagram 2406LS Page 27...

Страница 30: ..._____________________________________________________________________________ __________________________________________________________________________________________ _______________________________...

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