ITV ICE MAKERS ALFA Technical & Service Manual Download

Page: 26 / 27

NG DP

TECHNICAL SERVICE MANUAL

10. TROUBLESHOOTING

PROBLEM

POSSIBLE CAUSES

SOLUTION

1) None of the electrics work.

A) The machine is not plugged in.

A) Plug the machine.

B) The line fuse has blown.

B) Replace fuse.

C) The current line is wrongly
connected in the junction box.

C) Check connections.

D) The cut off micro-switch is faulty or
wrongly adjusted.

D) Check, adjust or change.

E) Safety pressure switch faulty.

E) Replace.

2) All the electrics work except
compressor.

A) Check switch installed in electrical

panel.

A) Select position 1..

B) Faulty relay .

B) Replace relay.

C) Faulty

“Klixon”.

C) Replace Klixon.

D) Faulty compressor.

D) Replace compressor.

3) All the electrics work but the
compressor

“klixons”

A) Voltage too low.

A) Check voltage.

B) Dirty condenser.

B) Clean condenser.

C) Obstruction in air circulation.

C) Move machine to a correct position.

D) Fan has broken.

D) Replace fan.

E) Starter capacitor faulty.

E) Replace condenser.

F) Fan pressure swtich faulty or
wrongly adjusted.

F) Replace or adjust pressure switch

G) Water pressure switch valve
faulty or wrongly adjusted.

G) Replace or adjust.

H) Cooling water pressure switch is
faulty or badly adjusted.

H) Adjust or change.

J) Non-condensable gases in system. J) Purge system.

4) Everything appears to be

running correctly but no ice is
being

made

the

evaporator.

A) Unprimed pump.

A) Check overflow, water bin for leaks,

water entry valve and prime the
pump.

B) Faulty pump.

B) Replace.

C) Water does not enter into the bin.

C) Check water entry valve and change

if is necessary.

D) There is water in the gas circuit.

D) Replace the drier, empty the

refrigerant (vacuum) and charge
new refrigerant.

E) Water tray is dry.

E) Check overflow pipe and for leaks.

Inspect  draining  valve  in  machines
with  automatic  cleaning  system.
Check  the  buoy  valve  mechanism
in DP90 and DP140.

F) Freezing system is faulty (dirty

condenser, water pressure switch
or entrance

valve

faulty

wrongly

adjusted

insufficient

refrigerant.

F) Clean condenser, check all the

system

components:

pressure

switch, water inlet valve, refrigerant
charge, etc.

Summary of Contents for ALFA

Page 1: ...DP 30 NG DP 35 NG DP 45 NG DP 60 NG DP 80 NG DP 110 NG DP 150 NG MDP 150 MODULAR CAREFULLY READ THE INSTRUCTIONS CONTAINED IN THIS MANUAL SINCE THEY PROVIDE IMPORTANT INFORMATION RELATIVE TO SAFETY DURING INSTALLATION USE AND MAINTENANCE THIS APPLIANCE SHOULD BE INSTALLED BY APPROVED TECHNICAL SERVICE PERSONNEL ...

Page 2: ...Preliminary Checks 18 5 2 Starting up 18 6 ADJUSTMENTS 19 6 1 Condenser water valve pressostat 19 6 2 Fan pressostat air cooled models 19 7 MAINTENANCE AND CLEANING INSTRUCTIONS 21 8 MAINTENANCE AND CLEANING PROCEDURES 22 8 1 Water condenser 22 8 2 Air condenser 22 8 3 Evaporator Water Through 22 8 4 Cleaning the ice bin 23 8 5 Cleaning the outside of the machine 23 8 6 Spray nozzles and connectin...

Page 3: ... Improper use by other than specially trained technicians is extremely dangerous and may result in a fire or electric shock This machine should not be placed outdoors or exposed to rain Connect to drinking water mains This appliance is not intended for use by young children or infirm persons without supervision Young children should be supervised to ensure that they do not play with the appliance ...

Page 4: ...AGE To do so turn the wheels on the timer until the microswitches are depressed At this moment the compressor is working the water inlet valve and hot gas inlet valve are both open The water bin fills with water any excess is lost via the maximum level overflow After a period of time controlled by the timer the hot gas valve and water inlet valve are closed The pump then sends water to the evapora...

Page 5: ...llows to do the cleaning of the machine except in NDP20 model Current reaches the machine via the line connecting the blue 1 and brown 2 terminals The brown wire connects the compressor and timer motor The blue wire connects bin thermostat T1 which closes the circuit with 2 A different blue wire goes to 2 on terminal G1 which at this moment is connecting 1 and 4 A red wire connects bin thermostat ...

Page 6: ...ce the cycle is over the pins on the timer wheels will force the micros to change circuits stopping the pump and opening the hot gas valve and water valve The combined effect of hot gas and water sprayed on the top of the evaporator will release the ice cubes and change the position of the cycle thermostat T2 The ice production and defrosting cycle will continue until the ice storage bin is full a...

Page 7: ...NG DP TECHNICAL SERVICE MANUAL 1 4 Wiring diagrams 7 ...

Page 8: ...NG DP TECHNICAL SERVICE MANUAL 2 SPECIFICATIONS NDP 20 NG DP 30 150 8 ...

Page 9: ...95x795 525x645x920 50 NG DP 45 A 18 8 18 8 45 465x595x795 525x645x920 53 NG DP 45 W 24 18 8 42 8 45 465x595x795 525x645x920 53 NG DP 60 A 28 8 28 8 48 535x595x795 595x645x920 67 0 40 NG DP 60 W 30 28 8 58 8 48 535x595x795 595x645x920 67 0 40 NG DP 80 A 14 6 10 6 58 715x595x945 780x670x1055 78 0 57 NG DP 80 W 54 14 6 68 6 58 715x595x945 780x670x1055 78 0 57 NG DP 110 A 17 2 17 2 89 715x700x1050 780...

Page 10: ... bar 18 bar 3 7 3 8 590 NG DP 60 W 3 2 3 8 460 NG DP 80 A 3 6 1 2 800 NG DP 80 W 3 1 2 800 NG 110 A 5 7 8 950 NG 110 W 5 7 8 950 NG 150 A 6 1 3 8 1200 NG 150 W 6 1 3 8 1200 MDP 150 A 6 1 3 8 1200 MDP 150 W 6 1 3 8 1200 1 Data obtained at room temperature 20 C water introduced at 15 C water quality 500ppm 2 Maximum consumption obtained at room temperature 43 C according to UNE climate classificatio...

Page 11: ...12 13 14 15 16 16 16 20 12 14 15 16 17 18 18 18 15 14 16 17 18 19 20 20 20 10 16 17 19 20 21 21 21 21 5 17 18 20 21 22 22 23 23 NG 30 Tw Ta 45 40 35 30 25 20 15 10 35 8 10 12 14 15 16 17 17 30 11 14 16 18 19 20 21 21 25 15 18 20 22 23 24 24 24 20 18 21 23 25 26 27 27 27 15 21 23 26 27 29 30 30 30 10 23 26 28 30 31 32 32 32 5 25 28 30 32 33 34 34 34 ...

Page 12: ...7 28 28 28 20 21 24 27 29 30 31 32 32 15 24 27 30 32 34 35 35 35 10 27 30 33 35 36 37 38 38 5 29 32 35 37 39 40 40 40 NG 45 Tw Ta 45 40 35 30 25 20 15 10 35 11 15 19 21 23 24 25 25 30 17 21 25 27 29 30 31 31 25 23 27 30 32 34 36 36 37 20 27 31 35 37 39 40 41 41 15 32 35 39 41 43 45 45 45 10 35 39 42 45 47 48 49 49 5 38 42 45 48 50 51 52 52 ...

Page 13: ...6 48 49 79 20 37 42 46 50 52 54 55 55 15 42 47 52 55 58 60 60 60 10 47 52 56 60 63 64 65 65 5 51 56 60 64 66 68 69 69 NG 80 Tw Ta 45 40 35 30 25 20 15 10 35 21 28 33 38 41 44 45 45 30 31 38 44 49 52 54 55 55 25 41 48 53 58 62 64 65 65 20 49 56 62 67 70 72 73 73 15 56 63 69 74 77 80 81 81 10 63 70 75 80 83 86 87 87 5 68 75 81 85 89 91 92 92 ...

Page 14: ...9 101 101 15 78 87 95 102 106 110 111 111 10 86 96 104 110 115 118 120 119 5 93 103 111 117 122 125 127 126 NG 150 Tw Ta 45 40 35 30 25 20 15 10 35 39 52 63 72 78 82 84 84 30 59 72 83 92 98 102 104 104 25 77 90 101 109 116 120 122 122 20 92 106 116 125 132 136 138 138 15 106 119 130 139 145 150 152 151 10 118 131 142 150 157 161 163 163 5 127 140 151 160 167 171 173 173 ...

Page 15: ...umber is located in the following three places 1 Packing There is a label stuck onto the cardboard packing bearing this serial number 1 2 Machine body On the back of the machine 1 3 Rating plate and serial number Located at the back of the machine Water cooled machines check that the drainage hose at the back of the machine is in good condition Verify that the installation kit is inside the bin an...

Page 16: ...of the compressor becomes shorter and the production decreases considerably IMPORTANT The new box type frame in NG models allows a better ventilation in the air cooled machines due to the fact that the condensers are placed in oblique position in the front part of the machine The machines will work properly even if they are located in places with little ventilation at the rear and lateral sides Th...

Page 17: ...er diameter of 30mm and a minimum gradient of 3 cm per metre 3 4 3 Electrical connection The Unit is provided with a 1 5 m cord and schucko socket If the cord is damaged shoud be replaced by a cord or special assembly supplied by the manufacturer or after sales service It is strongly recommended to leave a minimum space between the rear side and the wall in order to have an easy access to the plug...

Page 18: ...er pressure adequate MAXIMUM 0 7 bar MINIMUM 6 bar NOTE To install a pressure reducer If water inlet pressure is more than 6 bar ATENTION Check that voltage and mains frequency is the same as in the rating plate 5 2 Starting up Having followed the installation instructions ventilation temperature room conditions water quality etc proceed as follows 1 Open water faucet Check for leaks 2 Plug machin...

Page 19: ...hich is equivalent to a condensation water exit temperature of 38ºC 100ºF Below this pressure it will be difficult to unstick the cubes during the defrosting cycle Above this pressure compressor life and ice production are both reduced Pressure can be increased by turning the small screw on the pressure switch clockwise A full turn is equivalent to about 1 5 Bar 6 2 Fan pressure switch air cooled ...

Page 20: ...ssure might exceed the limit when a Air circulation is not sufficient room temperature is too high or condenser is dirty air cooled models b There is not enough water in the system or water temperature too high in water cooled models HIGH PRESSURE REGULATION fixed 3030 22 Bar from model 110 part 2683 27 21 Bar 380 296 psi ...

Page 21: ... on a monthly basis MAINTENANCE TABLE ACTION MONTHLY BIMONTHLY SEMIANNUAL ANNUAL BIENNIAL TIME Air condenser cleaning 30 minutes Water condenser cleaning 90 minutes Injectors cleaning 30 minutes Fabrication head filter cleaning 30 minutes Water circuit cleaning 45 minutes Sanitary cleaning 30 minutes Water filter cleaning replacement 30 minutes Stock deposit cleaning General unit cleaning Essentia...

Page 22: ...machine 2 Close water faucet 3 Clean condenser using a vacuum cleaner soft brush and or low pressure air 8 3 Evaporator Water Through 1 Switch off the electric panel and place the timer in defrosting position 2 Remove the top cover 3 Place the overflow pipe Remove the evaporator cover 4 Prepare a solution of 50 phosphoric acid in distilled water Do not use hydrochlorate acid Pour slowly this solut...

Page 23: ... ice produced during this procedure 11 Clean and assemble all the components Verify that the grill is cleaned and that cubes slide properly Check that any strip gets blocked in the curtain Check and or change the water inlet filters 12 Check the adjustments of the cycle thermostat cubes more or less filled and that at the end of the cycle the frost is closed to the compressor 13 CHECK THAT THE NOZ...

Page 24: ...NOZZLES ARE COMPLETELY PERPENDICULAR TO THE CONNECTING TUBES OTHERWISE THE CUBES AT THE ENDS MAY NOT RECEIVE WATER 7 Place the grill over the nozzles with the back slots secure 8 Install the curtain ensuring that all of the strips can move freely 9 Run the machine but DISCARD THE FIRST SET OF ICE CUBES 8 7 Cleaning the water inlet filters These round wire gasket filters placed on either end of the...

Page 25: ... wash inside of circuit with a suitable solvent pump dry with nitrogen gas REPLACE THE DRIER WITH ONE SUITABLE FOR R 404A which must also have ANTI ACID properties If you need to add oil use one which is specific for R 404A POE If you are in doubt contact the machine manufacturer If there is a leak anywhere in the circuit where R 404A in the GAS phase and a refill of over 10 is required then ALL T...

Page 26: ... pressure swtich faulty or wrongly adjusted F Replace or adjust pressure switch G Water pressure switch valve faulty or wrongly adjusted G Replace or adjust H Cooling water pressure switch is faulty or badly adjusted H Adjust or change J Non condensable gases in system J Purge system 4 Everything appears to be running correctly but no ice is being made in the evaporator A Unprimed pump A Check ove...

Page 27: ...ose totally C Replace D Faulty fan or pressure switch faulty inlet cooling water valve D Check fan and re adjust pressure switch t or replace E Refrigerant charge too high or too low E Adjust F Faulty water inlet valve leaks and does not close fully F Check and replace G Inefficient compressor G Replace 7 Ice cube are so large that they stick together and form a plate of ice A Start of cycle therm...

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