Mf series second half

MF SERIES
MAINTENANCE

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MAINTENANCE
The most important program on the maintenance of the Flaker machines is the cleaning/sanitizing to be done on regular base as detailed here below:
Sanitizing: Every month
Cleaning: Every six
On next slides will be shown the procedure for sanitizing and cleaning.

MF SERIES
MAINTENANCE
TOOLS REQUIRED
Medium Phillips Screwdriver
Medium Flat Screwdriver
Pair of safety gloves
Bucket
Different types of brush
Approved Cleaner/Sanitiser

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MAINTENANCE
Remove the front/top panel.

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MAINTENANCE
Switch OFF the machine at main power switch….
…..and close the water tap on water inlet line.
OFF
CLOSED

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MAINTENANCE
Scoop out all ice stored into the bin so to prevent its contamination.

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MAINTENANCE
Remove the metal clamp and disconnect the water tube from the outlet of the water reservoir.
Collect….

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MAINTENANCE
….the water into a rag then.....

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MAINTENANCE
….place again the tube on the outlet port.

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MAINTENANCE
Prepare the cleaning solution by diluting in a plastic bucket lukewarm water (max 40ºC) with SCOTSMAN Ice Machine Cleaner as per the following quantities:

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MAINTENANCE
MF 22: 1,5 LITER WATER WITH 150 CC CLEANER
MF 30: 2 LITERS WATER WITH 200 CC CLEANER
MF 41/51: 4 LITERS WATER WITH 400 CC CLEANER
MF 61: 4 LITERS WATER WITH 400 CC CLEANER PER EVAPORATOR

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MAINTENANCE
Remove the water reservoir cover then….
….slowly pour onto the water reservoir the cleaning solution.

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MAINTENANCE
Leave the machine in OFF mode for approximately 20 minutes so to have the cleaning solution melting the scale into the entire water system.

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MAINTENANCE
With the help of a brush dissolve the most resistant and remote scale deposits into the plastic tube connecting the water reservoir to the bottom of the freezer.

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MAINTENANCE
Jump with a wire or connect together the two metal pins of the water level sensor then….

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MAINTENANCE
… move the master switch to ON position.
ON

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MAINTENANCE
Few minutes later the machine start up to produce and discharge ice (slash) into the storage bin.

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MAINTENANCE
As soon as the level of the water into the water reservoir is going down, slowly poor the remaining cleaning solution till empty the bucket

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MAINTENANCE
Once empty the bucket open the water tap so to allow new fresh water into the water reservoir and leave the machine running for approximately 10 minutes.

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MAINTENANCE
When sure that no more trace of cleaning solution is left into the water system poor 1 cc of Scotsman sanitizer directly into the water reservoir then….

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MAINTENANCE
….place again the water reservoir cover paying attention to remove the jumper between the two metal pins.

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MAINTENANCE
Scoop out the flake ice produced with cleaning/sanitizing solution.

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MAINTENANCE
Wash the inside of the storage bin with sanitizing solution (1 cc sanitizer per liter of water) so to be sure no more trace of de-scaling/cleaning solution remains into the sump.

MAINTENANCE
REMEMBER. To prevent the accumulation of undesirable bacteria it is necessary to sanitize the interior of the storage bin with a sanitizing solution every week.
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MF SERIES
MAINTENANCE
It is possible to change a little bit the quality of the flaker or superflaker ice produced by the machine by rising or lowering the water reservoir assembly.

MF SERIES
MAINTENANCE
The unit frame is equipped by five series of holes so to secure at different level the water reservoir.
Higher level is for wetter ice while lower level for drier ice.

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SERVICE ANALYSIS

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SERVICE ANALYSIS
Bin Full situation:
Green and Yellow LED ON.

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SERVICE ANALYSIS
Check for the correct operation of the Optical Ice Level control located on the upper outside part of the ice chute.

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SERVICE ANALYSIS
The two eyes placed on the opposite side of the plastic bracket must be perfectly clean with no dust and/or scale.

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SERVICE ANALYSIS
Check also for any possible accumulation of scale around the two holes located on the opposite sides of the ice chute.

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SERVICE ANALYSIS
The power signal transmitted by the Optical Ice Level Control to the PC Board can be increased by means a small trimmer.

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SERVICE ANALYSIS
If re-adjusted, be sure first of the correct tripping OFF at Optical Ice Level Control using ICE (no the hand).

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SERVICE ANALYSIS
ATTENTION. The Optical Ice Level Control can be affected by the sun light.
Avoid to leave the machine in operation directly under the sun light and/or without the service panels.

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SERVICE ANALYSIS
No water situation:
Green and Yellow LED ON.

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SERVICE ANALYSIS
Check first for the water tap on the water supply line …...
CLOSED

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SERVICE ANALYSIS
……for the water filter located on the water inlet line…..

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SERVICE ANALYSIS
……for the water strainer located inside the water inlet fitting…..

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SERVICE ANALYSIS
…..for the correct cleaning of the orifice of the water reservoir.
If not clean it with a small metal pin.

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SERVICE ANALYSIS
In case of water into the water reservoir check for any scale deposit onto the two metal pins of the water level sensor…..

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SERVICE ANALYSIS
…..or for any loosing wire between the two metal pins and…...
…...the PC Board connector (red color two pins connector).

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SERVICE ANALYSIS
ATTENTION. The water level sensor operate by transmitting a low voltage current through the water. If water is very soft, with a very low content of mineral salts, no current is transmitting back to the PC Board tripping OFF the machine at NO WATER LED.
A minimum of 30µS electrical conductivity water is required for correct operation of the machine.

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SERVICE ANALYSIS
3’ waiting time:
Green LED ON
Red LED blinking

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SERVICE ANALYSIS
It is a normal situation at every machine start up after any tripping off (Bin Full, No Water, Etc.).
When needed the 3’ waiting time can be by-passed by jumping the two contacts J3…..
…...and Switch OFF and ON the machine.

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SERVICE ANALYSIS
Too low ambient temperature(<+3ºC) Green and Red LED ON.

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SERVICE ANALYSIS
It is a typical winter situation.
When the machine is located in a very cold room (<+3ºC) the condenser sensor keep the machine OFF till the temperature rise up to more then +5ºC.

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SERVICE ANALYSIS
Too high condensing temperature (>60ºC or >70ºC)
Green and Red LED ON.

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SERVICE ANALYSIS
On Air Cooled Version check first for the correct operation of the fan motor i.e.:
Power to the motor

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SERVICE ANALYSIS
On Air Cooled Version check first for the correct operation of the fan motor i.e.:
Power to the motor
Open winding of the motor

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SERVICE ANALYSIS
On Air Cooled Version check first for the correct operation of the fan motor i.e.:
Power to the motor
Open winding of the motor
Fan blade loose on fan motor shaft

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SERVICE ANALYSIS
Check also for any possibility of fan motor overheating that can happen after a certain time from the start up of the machine.

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SERVICE ANALYSIS
One more possibility (very rare) it is a faulty PC Board (TRIAC) that can keep energized the fan motor during the OFF period with a low voltage but higher then the minimum one need for tripping OFF the motor.
160 V

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SERVICE ANALYSIS
During normal operation mode the fan motor is energized at 230 V during its ON mode and…..
…...is not energized at all during its OFF mode.

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SERVICE ANALYSIS
In case the power during the OFF mode is between 140 and 170 V the fan motor is keeping running but at lower speed that can cause an overheat of the same.

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SERVICE ANALYSIS
On Water Cooled Version check first for the:
Water tap
CLOSED

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SERVICE ANALYSIS
On Water Cooled Version check first for the:
Water tap Correct operation of the water regulating valve

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SERVICE ANALYSIS
Too high evaporating temperature after 10’ operation
Green LED ON
Yellow LED blinking

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SERVICE ANALYSIS
Check if ice is produced during the first ten minutes of operation; if so, the evaporator sensor is defective and must be replaced (not able to transmit the right current back to the PC Board).

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SERVICE ANALYSIS
If no ice is produced check for:
Refrigerant charge. Hi side pressure must be between 17÷18 bar (240÷250 PSI)…..

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SERVICE ANALYSIS
…...while suction pressure must be 2.5 bar (35 PSI)

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SERVICE ANALYSIS
If no ice is produced check for:
Refrigerant charge
Operation of Compressor

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SERVICE ANALYSIS
If no ice is produced check for:
Refrigerant charge
Operation of Compressor
Power out on the contacts 7 and 8 of the PC Board

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SERVICE ANALYSIS
No rotation of drive motor
Green and Yellow LED ON.

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SERVICE ANALYSIS
If the drive motor doesn’t turn check for:
Power out on the contacts 5 and 6 of the PC Board

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SERVICE ANALYSIS
If the drive motor doesn’t turn check for:
Power out on the contacts 5 and 6 of the PC Board
Drive motor with open winding

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SERVICE ANALYSIS
If the drive motor doesn’t turn check for:
Power out on the contacts 5 and 6 of the PC Board
Drive motor with open winding
Drive motor capacitor worn-out
KO

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SERVICE ANALYSIS
If the drive motor doesn’t turn check for:
Power out on the contacts 5 and 6 of the PC Board
Drive motor with open winding
Drive motor capacitor worn-out
Looked rotor

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SERVICE ANALYSIS
Slow rotation of drive motor (<1200 g/min)
Green and Yellow LED ON.

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SERVICE ANALYSIS
Check for:
Worn out drive motor bearings

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SERVICE ANALYSIS
Check for:
Worn out drive motor bearings
Worn out freezer top or bottom bearings

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SERVICE ANALYSIS

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SERVICE ANALYSIS
Check for:
Worn out drive motor bearings
Worn out freezer top or bottom bearings
Worn out auger/freezer

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SERVICE ANALYSIS
OK!
KO!

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SERVICE ANALYSIS
Check for:
Worn out drive motor bearings
Worn out freezer top or bottom bearings
Worn out auger/freezer
Worn out gear box bearing/gears

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SERVICE ANALYSIS

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SERVICE ANALYSIS
Wrong rotation of drive motor (opposite direction)
Green and Yellow LED ON.

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SERVICE ANALYSIS
Check for:
Correct wires connection to the drive motor capacitor
OK

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SERVICE ANALYSIS
Check for:
Correct wires connection to the drive motor capacitor
Drive motor capacitor worn-out
KO

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SERVICE ANALYSIS
Check for:
Correct wires connection to the drive motor capacitor
Drive motor capacitor unloaded
Freeze up of the evaporator

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SERVICE ANALYSIS
Additional reasons for the tripping OFF at Rotation Error are: Magnetic sensor unplugged

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SERVICE ANALYSIS
Magnetic sensor unplugged
Magnetic sensor too far from the rotating magnetic cylinder
0.5÷1 mm

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SERVICE ANALYSIS
Magnetic sensor unplugged
Magnetic sensor too far from the rotating magnetic cylinder
Magnetic cylinder partially or fully demagnetized

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SERVICE ANALYSIS
Automatic
reset mode
Manual
reset mode
Bin Full
No Water
Too Low Room Temperature
Too Hi Condensing Temperature
Too Hi Evaporating Temperature
No Rotation
Wrong Rotation
Slow Rotation

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SERVICE ANALYSIS
Manual reset mode
The New Flaker PC Board Trip OFF definitively the machine on ALARM after three tripping OFF for the same reason in 4 hours.
In this way the New PC Board should avoid any Tripping OFF due to possible magnetic fields and/or micro black OUT of power supply that can affect the correct operation of the Flaker machine.

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REPLACEMENT OF THE AUGER, WATER SEAL AND BEARINGS

MF 22-30 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
Remove first the front/top panel and then ……

MF 22-30 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
……the sides/rear panel.

MF 22-30 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
Unloose the wing nut then…...
…..remove the metal rod securing the plastic ice chute to the ice spout.

MF 22-30 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
Cut the plastic strap and remove the….
…..two polystyrene insulation from the spout.

MF 22-30 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
Unscrew and remove the two screws securing the brass ice breaker to the evaporator.

MF 22-30 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
Grasp with a screw driver the wire cap hook located at the top of the freezer and pull out the auger and attached ice breaker assembly.

MF 22-30 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
Parts pulled out from the top of the evaporator/worm tube are:
ice breaker assembly
auger
top half of the water seal

MF 22-30 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
With a clip ring pliers remove the retaining ring and the cap from the ice breaker.

MF 22-30 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
Unloose and remove the screw and…..

MF 22-30 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
…...remove the ice breaker assembly from the auger.

MF 22-30 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
Clean away the old grease from the interior of the ice breaker and inspect the conditions of the top bearing …...

MF 22-30 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
…... as well as the condition of the O ring.

MF 22-30 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
Slide off from the bottom of the auger the upper half of the water seal.

MF 22-30 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
Unloose and remove the three bolts and lock-washers holding the freezer assembly to the aluminium adapter then …...

MF 22-30 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
…... raise the freezer assembly off the adapter and move it out so to have enough room to work.
Using a suitable wooden dowel inserted through the top of the freezer…...

MF 22-30 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
…...tap the lower half of the water seal …..
…….and the lower bearing out the bottom of the freezer.

MF 22-30 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
It is good practice to replace the water seal assembly, the two top and bottom bearings and the O ring any time the auger is removed.
A Kit is available for this purpose containing a can of waterproof special grease.

MF 41-51-61 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
Remove first the front/top panel and then ……

MF 41-51-61 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
……the sides/rear panel.

REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
Unloose the wing nut then…...
…..remove the metal rod securing the plastic ice chute to the ice spout.
MF 41-51-61 SERIES

MF 41-51-61 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
Remove the ice chute with the optical ice level control secured on it then….

MF 41-51-61 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
Unscrew the screw securing the ice spout metal bracket to the frame of the machine….
…..then remove the strips from the insulated plastic ice spout.

MF 41-51-61 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
Remove from the plastic ice spout the two polystyre insulation covers then….

MF 41-51-61 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
….unloose the two screws securing the ice spout metal bracket to the ice breaker....
….and remove it.

MF 41-51-61 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
Remove the plastic ice spout….
….then unloose the four bolts holding the ice breaker to the upper flange of the freezer.

MF 41-51-61 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
With a couple of screwdrivers rise up a little bit the ice breaker and auger assembly then ….

MF 41-51-61 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
…. pull out the auger and ice breaker assembly.

MF 41-51-61 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
Parts pulled out from the top of the evaporator/worm tube are:
ice breaker assembly
auger
top half of the water seal

MF 41-51-61 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
With a screwdriver remove the plastic cap from the upper side of the ice breaker.

MF 41-51-61 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
Unloose and remove the screw and…..

MF 41-51-61 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
…...remove the ice breaker assembly from the auger.

MF 41-51-61 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
Clean away the old grease from the interior of the ice breaker and inspect the conditions of the top bearing …...

MF 41-51-61 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
…... as well as the condition of the O ring.

MF 41-51-61 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
Slide off from the bottom of the auger the upper half of the water seal.

MF 41-51-61 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
Unloose and remove the four bolts and lock-washers holding the freezer assembly to the aluminum adapter then …...

MF 41-51-61 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
…... raise the freezer assembly off the adapter and move it out so to have enough room to work.
Using two flat screwdrivers remove…..

MF 41-51-61 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
….. the bottom bearing and brass housing assembly with the bottom graphit ring of water seal.

MF 41-51-61 SERIES
REPLACEMENT OF AUGER, WATER SEAL AND BEARINGS
It is good practice to replace the water seal assembly, the two top and bottom bearings and the O rings any time the auger is removed.
A Kit is available for this purpose containing a can of waterproof special grease.