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Manitowoc QM30A Скачать руководство пользователя страница 31

Service

Section 6

6-6

COMPRESSOR ELECTRICAL
DIAGNOSTICS

The compressor will not start or will trip repeatedly
on overload.

Check Resistance (Ohm) Values

NOTE: Compressor windings can have very low
ohm values. Use a properly calibrated meter.

Perform the resistance test after the compressor
cools. The compressor dome should be cool enough
to touch (below 49

°

C/120

°

F) to assure that the

overload is closed and the resistance readings will
be accurate.

1.

Disconnect power from the ice machine and
remove the wires from the compressor
terminals.

2.

The resistance values must be within published
guidelines for the compressor. (see chart below)
The resistance values between C and S and
between C and R, when added together, should
equal the resistance value between S and R.

3.

If the overload is open, there will be a resistance
reading between S and R, and open readings
between C and S and between C and R. Allow
the compressor to cool, then check the readings
again.

Compressor Specifications

Embraco

Compressors

230/50/1

115/60/1

Model

FFI-12HBK

FF10HBK

Oil

Charge

350 ml

(11.8 fl. oz.)

350 ml

(11.8 fl. Oz.)

FLA (amps)

3.0

6.2

LRA (amps)

20.0

40.0

Start Winding (ohms)

29.9

5.4

Run Winding (ohms)

5.86

1.2

Check Motor Windings to Ground

Check continuity between all three terminals and
the compressor shell or copper refrigeration line.
Scrape metal surface to get good contact. If
continuity is present, the compressor windings are
grounded and the compressor must be replaced.

Determine if the Compressor is Seized

Check the amp draw while the compressor is trying
to start.

Compressor Drawing Locked Rotor

The two likely causes of this are:

•

Defective starting component

•

Mechanically seized compressor

To determine which you have:
1.

Install high and low side gauges.

2.

Try to start the compressor.

3.

Watch the pressures closely.
A.

If the pressures do not move, the compressor
is seized. Replace the compressor.

B.

If the pressures move, the compressor is
turning slowly and is not seized. Check the
start relay.

Compressor Drawing High Amps

The continuous amperage draw on start-up should
not be near the maximum fuse size indicated on the
serial tag. The voltage when the compressor is
trying to start must be within

±

10% of the

nameplate voltage.

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Содержание QM30A

Страница 1: ...er in ice making equipment and related products With proper care and maintenance your new Manitowoc Ice Machine will provide you with many years of reliable and economical performance We reserve the right to make product improvements at any time Specifications and design are subject to change without notice Part Number 80 1121 3 Rev C 01 01 ...

Страница 2: ...the following types of procedural notices Important Important boxes serve two functions They call the operator s attention to important information They also provide the service technician with information that may help perform a procedure more efficiently Disregarding this information may slow down the work NOTE Text set off as a Note provides you with simple but useful extra information CAUTION ...

Страница 3: ...owoc WI 54221 1720 USA Phone 920 682 0161 Service Fax 920 683 7585 Web Site www manitowocice com ã2000 Manitowoc Ice Inc Litho in U S A We reserve the right to make product improvements at any time Specifications and design are subject to change without notice ...

Страница 4: ...ing the Ice Machine 2 2 Electrical Service 2 3 Water Service Drains 2 5 Section 3 Ice Machine Operation Sequence of Operation 3 1 Ice Thickness Adjustment 3 2 Section 4 Maintenance General 4 1 Ice Machine Inspection 4 1 Exterior Cleaning 4 1 Cleaning the Condenser 4 2 Interior Cleaning and Sanitizing 4 3 Removal of Parts 4 5 Overview of Parts Removal 4 7 Removal from Service Winterization 4 8 Sect...

Страница 5: ...stat 6 4 Thermistor 6 5 Compressor Electrical Diagnostics Only 6 6 Hot Gas Valve 6 7 Ice Machine Will Not Run 6 8 Refrigeration Tubing Schematic 6 9 Cycle Times 24 Hour Production Charts Ice Production Check 6 10 Ice Production Check 6 11 Refrigeration Diagnostics 6 11 Refrigerant Recovery Evacuation and Recharging 6 12 Refrigerant Charging Procedure 6 13 Refrigerant Charge 6 13 ...

Страница 6: ...questing information from your Manitowoc distributor service representative or the factory The model and serial number are listed on the OWNER WARRANTY REGISTRATION CARD They are also listed on the MODEL SERIAL NUMBER DECAL affixed to the ice machine Model Serial Number Location MODEL NUMBER ________________________ SERIAL NUMBER _________________________ sv1702 MODEL AND SERIAL NUMBER MODEL AND S...

Страница 7: ...ents and cleaning as outlined in the Owner Operator Use and Care Guide 2 Repairs due to unauthorized modifications to the ice machine or the use of non standard parts without prior written approval Manitowoc Ice Inc 3 Damage caused by improper installation of the ice machine electrical supply water supply or drainage or damage caused by floods storms or other acts of God 4 Premium labor rates due ...

Страница 8: ...cm 30 00 56 74 cm 22 34 50 00 cm 19 69 Ice Making Water Bin Drain Ice Making Water Inlet Electrical Inlet sv1678c 15 24 cm 6 00 Legs sv1679b sv1678b 7 24 cm 2 85 7 32 cm 2 88 15 09 cm 5 94 15 73 cm 6 19 9 53 cm 3 75 8 51 cm 3 35 Levelers International ONLY 20 80 cm 8 19 3 33 cm 1 31 ...

Страница 9: ...ures below 0 C 32 F Failure caused by exposure to freezing temperatures is not covered by the warranty See Removal from Service Winterization on page 4 8 Self Contained Air Cooled Self Contained Water Cooled Top Sides 5 203 mm 5 127 mm Back 5 127 mm 5 127 mm NOTE The ice machine may be built into a cabinet There is no minimum clearance requirement for the top or the left and right sides of the ice...

Страница 10: ...r each ice machine NOTE A means of disconnect must be provided for field wiring ELECTRICAL RATING The electrical rating is used to help select the wire size of the electrical supply The wire size or gauge also depends on location materials used length of run etc so it must be determined by a qualified electrician FOR UNITED KINGDOM ONLY As the colours of the wires in the mains lead of the applianc...

Страница 11: ...Installation Instructions Section 2 2 4 THIS PAGE INTENTIONALLY LEFT BLANK ...

Страница 12: ...lines to prevent condensation DRAIN CONNECTIONS Follow these guidelines when installing drain lines to prevent drain water from flowing back into the ice machine and storage bin Drain lines must have a 2 5 cm 1 inch drop per 1 meter 40 inches of run and must not create traps The floor drain must be large enough to accommodate drainage from all drains Insulate the bin drain line to prevent condensa...

Страница 13: ... MINIMUM INSIDE DIAMETER ICE MAKING BIN WATER DRAIN TUBING 1 59 cm 5 8 MINIMUM INSIDE DIAMETER Typical Water Supply and Drain Line Sizing and Connections sv1680b WATER SHUT OFF VALVES OVERFLOW TUBE DRAIN HOLE Important Over flow tube must be securely installed during initial set up ...

Страница 14: ... water pump are energized and remain on throughout the entire freeze cycle An even flow of water is directed across the evaporator and into each cube cell where it freezes The control system automatically determines the length of the freeze cycle by monitoring the temperature of the refrigeration system liquid line 4 Harvest Cycle The condenser fan motor and water pump de energize The water fill v...

Страница 15: ... 7 9 oz If the slab weight is within this range the ice machine is working properly and no further action is needed If the slab weight is not within this range or you desire a slightly thicker or thinner cube continue to step four WARNING Do not touch electrical wires Disconnect power to the ice machine before making any ice thickness adjustments 4 Remove the air filter 5 Remove the two screws hol...

Страница 16: ...free operation and maximum ice production ICE MACHINE INSPECTION WARNING Disconnect electric power to the ice machine before cleaning the condenser Check all water fittings and lines for leaks Also make sure the refrigeration tubing is not rubbing or vibrating against other tubing panels etc Do not put anything boxes etc in front of the ice machine There must be adequate airflow through and around...

Страница 17: ...with a soft brush or a vacuum with a brush attachment Clean from top to bottom not side to side Be careful not to bend the condenser fins 3 Shine a flashlight through the condenser to check for dirt between the fins If dirt remains A Blow compressed air through the condenser fins from the inside Be careful not to bend the fan blades B Use a commercial condenser coil cleaner Follow the directions a...

Страница 18: ...ing Read and understand all labels printed on bottles before use CAUTION Do not mix Ice Machine Cleaner and Sanitizer solutions together It is a violation of Federal law to use these solutions in a manner inconsistent with their labeling WARNING Wear rubber gloves and safety goggles and or face shield when handling Ice Machine Cleaner or Sanitizer MANITOWOC S PATENTED CLEANING OR SANITIZING TECHNO...

Страница 19: ...edure NOTE If the toggle switch is moved to the off position the clean cycle will be terminated SANITIZING PROCEDURE Use sanitizer to remove algae or slime Do not use it to remove lime scale or other mineral deposits Step 1 Set the toggle switch to the OFF position after ice falls from the evaporator at the end of a Harvest cycle Or set the switch to the OFF position and allow the ice to melt off ...

Страница 20: ...ower panel on the front of the ice machine 2 Remove two Phillips head screws from the bottom corners of the door frame assembly 3 Lift the door frame assembly up and pull it out to clear the key slots on the back of the assembly Removing the Front Door OVERFLOW TUBE To remove the tube lift it up while using a slight back and forth motion to loosen it from the drain hole When installing the tube be...

Страница 21: ... switch box and turn off the water supply to the ice machine 1 Turn off the water supply to the ice machine 2 Remove two Phillips head screws to remove the lower panel on the front of the ice machine 3 Disconnect the inlet water tube from the valve 4 Disconnect the ice machine water line from the valve 5 Disconnect all electrical wires from the valve Important Write down where all electrical wires...

Страница 22: ...Section 4 Maintenance 4 7 Overview of Parts Removal sv1716 WATER TROUGH OVERFLOW TUBE WATER DISTRIBUTION TUBE WATER PUMP AND BRACKET ASSEMBLY WATER PUMP OUTLET HOSE EVAPORATOR ASSEMBLY REMAINS IN PLACE ...

Страница 23: ...ratures severe damage to some components could result Damage of this nature is not covered by the warranty 1 Disconnect the electric power at the circuit breaker or the electric service switch 2 Turn off the water supply 3 Remove the water from the water trough 4 Disconnect the drain and the incoming ice making water line at the rear of the ice machine 5 Make sure no water is trapped inside the ic...

Страница 24: ... or is slow to harvest Ice machine is dirty Clean and sanitize the ice machine See pages 4 4 Ice machine is not level Level the ice machine See page 2 2 Low air temperature around ice machine Air temperature must be at least 10 C 50 F Ice quality is poor soft or not clear Poor incoming water quality Contact a qualified service company to test the quality of the incoming water and make appropriate ...

Страница 25: ...al is not set properly Adjust the ice thickness adjustment dial See page 3 2 Incorrect incoming water pressure Water pressure must be 240 620 kPA 34 8 89 9 psi Ice machine is not level Level the ice machine See page 2 2 Low ice capacity Water inlet valve filter screen is dirty Remove the water inlet valve and clean the filter screen See page 4 6 Incoming water supply is shut off Open the water ser...

Страница 26: ...E L1 L2 THERMISTOR CONTROL BOARD LIGHT 1 2 3 TRANS FUSE ICE THICKNESS ADJUSTMENT DIAL 3 9 JUMPER WIRE 6 2 1 13 20 14 21 22 23 24 C S R OVERLOAD PROTECTOR COMPRESSOR STARTING DEVICE FAN MOTOR WATER PUMP HOT GAS SOLENOID WATER FILL SOLENOID BIN THERMOSTAT 4 12 7 8 WASH OFF ON FEMALE MALE CONNECTOR WIRE NUMBER DESIGNATION NUMBER MARKED AT EACH END OF WIRE TOGGLE SWITCH sv1773A ...

Страница 27: ... L1 N THERMISTOR CONTROL BOARD LIGHT 1 2 3 TRANS FUSE ICE THICKNESS ADJUSTMENT DIAL 3 9 JUMPER WIRE 6 2 1 13 20 14 21 22 23 24 C S R OVERLOAD PROTECTOR COMPRESSOR STARTING DEVICE FAN MOTOR WATER PUMP HOT GAS SOLENOID WATER FILL SOLENOID BIN THERMOSTAT 4 12 7 8 WASH OFF ON FEMALE MALE CONNECTOR WIRE NUMBER DESIGNATION NUMBER MARKED AT EACH END OF WIRE TOGGLE SWITCH ...

Страница 28: ...YS Function The control board relays energize and de energize system components Specifications Relays are not field replaceable There are three relays on the control board Relay Controls 1 Compressor 2 Water Inlet Valve Hot Gas Valve 3 Condenser Fan Motor Water Pump ON OFF WASH TOGGLE SWITCH Function The switch is used to place the ice machine in ON OFF or WASH mode of operation Specifications Sin...

Страница 29: ...Check Procedure WARNING High line voltage is applied to the control board terminals 8 and 2 at all times Removing the control board fuse or moving the toggle switch to OFF will not remove the power supplied to the control board WARNING Disconnect electrical power to the entire ice machine before proceeding 1 Remove the back panel to access the bin thermostat 2 Disconnect both wires 12 and 1 from t...

Страница 30: ...ading the actual temperature of the copper liquid line 3 With the ice machine running verify that the temperature of the discharge line step 2 corresponds to the thermistor resistance reading step 1 as stated in the temperature resistant chart Important If the thermistor would fail closed the light on the control board will flash rapidly If the thermistor would fail open the light on the control b...

Страница 31: ...50 1 115 60 1 Model FFI 12HBK FF10HBK Oil Charge 350 ml 11 8 fl oz 350 ml 11 8 fl Oz FLA amps 3 0 6 2 LRA amps 20 0 40 0 Start Winding ohms 29 9 5 4 Run Winding ohms 5 86 1 2 Check Motor Windings to Ground Check continuity between all three terminals and the compressor shell or copper refrigeration line Scrape metal surface to get good contact If continuity is present the compressor windings are g...

Страница 32: ... gas valve itself will not work for this comparison The hot gas valve outlet is on the suction side cool refrigerant It may be cool enough to touch even if the valve is leaking 3 Feel the compressor discharge line WARNING The inlet of the hot gas valve and the compressor discharge line could be hot enough to burn your hand Just touch them momentarily 4 Compare the temperature of the inlet of the h...

Страница 33: ... is closed 2 Verify control board fuse is OK If the power light functions the fuse is OK 3 Verify ICE OFF WASH toggle switch functions properly A defective toggle switch may keep the ice machine in the OFF mode 4 Verify the bin thermostat functions properly A defective bin thermostat can falsely indicate a full bin of ice 5 Verify low DC voltage is properly grounded Loose DC wire connections may i...

Страница 34: ...Section 6 Service 6 9 Refrigeration Tubing Schematic EVAPORATOR CAP TUBE COMPRESSOR HOT GAS SOLENOID VALVE CONDENSER DRIER sv1598 HEAT EXCHANGER ...

Страница 35: ... 11 1 8 2 11 9 25 77 7 9 11 5 8 6 12 4 10 2 14 6 1 25 3 25 30 86 8 6 12 4 9 5 13 7 10 4 14 9 11 2 16 0 11 8 16 8 35 95 10 4 14 9 11 8 16 8 12 4 17 6 13 1 18 6 40 104 13 8 19 6 15 1 21 4 16 1 22 7 45 113 17 2 24 2 18 4 25 9 19 8 27 8 24 Hour Ice Production Chart Air Temp Entering Water Temperature C F Condenser 10 50 20 68 30 86 35 95 40 104 C F kg lb kg lb kg lb kg lb kg lb 20 68 30 66 28 62 25 77...

Страница 36: ...y that your water flow is even across the entire evaporator before diagnosing the refrigeration system Mineral build up on the evaporator assembly can cause water tracking and an erratic ice fill pattern Clean with Manitowoc Ice Machine cleaner to remove any mineral build up before entering the refrigeration system The following can be used for diagnostics Capillary Tube failures or low refrigeran...

Страница 37: ...ged Important Purge system with nitrogen while brazing to prevent build up of copper oxide in the refrigeration system Recovery Evacuation 1 Place the toggle switch in the OFF position 2 Install manifold gauges charging scale and recovery unit or two stage vacuum pump Recovery Evacuation Connections 3 Open the high and low side valves on manifold gauges 4 Perform recovery or evacuation A Recovery ...

Страница 38: ...rant contamination or loss occurs A quick disconnect is required for the high side connection unless high side valve has shut off 9 Make sure that all of the vapor in the charging hoses is drawn into the ice machine before disconnecting the charging hoses A Disconnect the water pump B Run the ice machine in the freeze cycle C Close the high side piercing valve if required and remove the high side ...

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