Manitowoc Marine Q 1300 Service Manual

Marine Q 1300 Ice Machine Service Manual Thank you for selecting a Manitowoc Ice Machine, the dependability leader in ice making equip

6 Electrical System Harvest Sequence 5. WATER PURGE The water pump continues to run, and the water dump valve energizes for 45 seconds to purge the

7 Electrical SystemHarvest Sequence (cont.) 6. HARVEST The hot gas valve(s) remains open, allowing refrigerant gas to warm the evaporator. This ca

8 Electrical System 7. Automatic Shut-Off If the storage bin is full at the end of a harvest cycle, the sheet of cubes fails to clear the water cu

9 Electrical SystemWiring Diagrams The following pages contain electrical wiring diagrams. Be sure you are referring to the correct diagram for the

10 Electrical System Q1300 - 1 PHASE (61)(74)L1 TB30TB30TB30TB30SEE SERIAL PLATE FOR VOLTAGEL2 (N)CAUTION: DISCONNECT POWER BEFORE WORKING ON

11 Electrical SystemComponent Specifications and Diagnostics MAIN FUSE BIN SWITCH Function Function The control board fuse stops ice machine op

12 Electrical System Check Procedure Water Curtain Removal Notes 1. Set the toggle switch to OFF. The water curtain must be on (bin switch close

13 Electrical SystemCOMPRESSOR ELECTRICAL DIAGNOSTICS The compressor will not start or will trip repeatedly on overload. Check Resistance (Ohm) Valu

14 Electrical System PTCR DIAGNOSTICS What is a PTCR? A PTCR (or Positive Temperature Coefficient Resistor) is made from high-purity, semi-conducti

15 Electrical SystemQ-Model Automatic Shut-Off and Restart Troubleshooting PTCR’s When the storage bin is full at the end of a harvest cycle, the s

Safety Notices When using or servicing a Q Model Ice Machine, be sure to pay close attention to the safety notices in this manual. Disregarding the no

16 Electrical System There are other problems that may cause compressor start-up failure with a good PTCR in a new, properly wired ice machine. R

15 Electrical SystemICE/OFF/CLEAN TOGGLE SWITCH Function The switch is used to place the ice machine in ICE, OFF or CLEAN mode of operation. Specifi

18 Electrical System ELECTRONIC CONTROL BOARD 57555868 65 60 61 56 1G 67 63 62 MAIN FUSE (7A) AUTOMATIC C

19 Electrical SystemGeneral Q-Model control boards use a dual voltage transformer. This means only one control board is needed for both 115V and 20

20 Electrical System Ice Thickness Probe (Harvest Initiation) HOW THE PROBE WORKS Manitowoc’s electronic sensing circuit does not rely on refrigeran

21 Electrical System DIAGNOSING ICE THICKNESS CONTROL CIRCUITRY Ice Machine Does Not Cycle Into Harvest when Water Contacts the Ice Thickness Contro

22 Electrical System Ice Machine Cycles Into Harvest Before Water Contact With The Ice Thickness Probe Step 1 Disconnect the ice thickness probe fr

23 Electrical SystemWater Level Control Circuitry WATER LEVEL PROBE LIGHT FREEZE CYCLE CIRCUITRY The water level probe circuit can be monitored by

24 Electrical System DIAGNOSING FREEZE CYCLE POTABLE WATER LEVEL CONTROL CIRCUITRY Problem: Water Trough Overfilling During The Freeze Cycle Step 1

25 Electrical System Problem: Water Trough Overfilling During The Freeze Cycle (continued) Step 3 Allow ice machine to run. Disconnect the water le

Table of Contents Electrical System Energized Parts Charts Self-Contained Water-Cooled Models ...

26 Electrical System Problem: Water Will Not Run Into The Sump Trough During The Freeze Cycle Step 1 Verify water is supplied to the ice machine, a

27 Electrical SystemDiagnosing Ice Machine That Will Not Run WARNING High (line) voltage is applied to the control board (terminals #55 and #56) a

28 Refrigeration System Refrigeration System Sequence of Operation Q1300 REFRIGERATION TUBING SCHEMATICS DRIER RECEIV

29 Refrigeration System Operational Analysis (Diagnostics) GENERAL When analyzing the refrigeration system, it is important to understand that diffe

30 Refrigeration System BEFORE BEGINNING SERVICE Ice machines may experience operational problems only during certain times of the day or night. A m

31 Refrigeration SystemINSTALLATION/VISUAL INSPECTION CHECKLIST Possible Problem Corrective Action Ice machine is not level Level the ice machine

32 Refrigeration System ICE FORMATION PATTERN 2. Extremely Thin at Evaporator Outlet Evaporator ice formation pattern analysis is helpful in ice ma

33 Refrigeration System3. Extremely Thin at Evaporator Inlet 5. No Ice Formation There is no ice, or a considerable lack of ice formation on the bo

34 Refrigeration System SAFETY LIMITS General In addition to standard safety controls, such as high pressure cut-out, the control board has two buil

35 Refrigeration SystemSafety Limit #1 Freeze time exceeds 60 minutes for 3 consecutive freeze cycles. Possible Cause Check/Correct Improper instal

Table of Contents Refrigeration System Sequence of Operation Self-Contained Water-Cooled Models ...

36 Refrigeration System Safety Limit #2 Harvest time exceeds 3.5 minutes for 3 consecutive harvest cycles. Possible Cause Check/Correct Improper i

37 Refrigeration System HOT GAS VALVE TEMPERATURE CHECK 3. Feel the compressor discharge line. General A hot gas valve requires a critical orifice

38 Refrigeration System ANALYZING DISCHARGE PRESSURE DURING FREEZE OR HARVEST CYCLE 1. Determine the ice machine operating conditions: Air temp.

39 Refrigeration SystemANALYZING SUCTION PRESSURE DURING FREEZE CYCLE The suction pressure gradually drops throughout the freeze cycle. The actual s

40 Refrigeration System Freeze Cycle Suction Pressure High Checklist Possible Cause Check/Correct Improper installation • See “Installation/Visu

41 Refrigeration SystemHOW TO USE THE REFRIGERATION SYSTEM OPERATIONAL ANALYSIS TABLES General These tables must be used with charts, checklists and

42 Refrigeration System Q Model Dual Expansion Valve Refrigeration System Operational Analysis Table This table must be used with charts, checklists

43 Refrigeration SystemPressure Control Specifications and Diagnostics HIGH PRESSURE CUTOUT (HPCO) CONTROL Function Stops the ice machine if subjec

44 Refrigeration System Cycle Time/24 Hour Ice Production/Refrigerant Pressure Charts Q1300 SERIES WATER-COOLED NOTE: These characteristics may va

45 Refrigeration SystemRefrigerant Recovery/Evacuation and Recharging SELF-CONTAINED RECOVERY/EVACUATION NORMAL SELF-CONTAINED MODEL PROCEDURES 1.

1 Electrical SystemElectrical System Energized Parts Charts SELF-CONTAINED WATER-COOLED MODELS Ice Making Control Board Relays Sequence 1 2 3

46 Refrigeration System Self-Contained Charging Procedures 2. Close the vacuum pump valve, the low side service valve, and the low side manifold g

47 Refrigeration SystemSYSTEM CONTAMINATION CLEANUPGeneral This section describes the basic requirements for restoring contaminated systems to relia

48 Refrigeration System Mild System Contamination Cleanup Procedure 1. Replace any failed components. 2. If the compressor is good, change the oi

49 Refrigeration SystemREPLACING PRESSURE CONTROLS WITHOUT REMOVING REFRIGERANT CHARGE 11. Follow the normal evacuation procedure, except replace th

50 Refrigeration System FIG. A - “PINCHING OFF” TUBING TYPICAL PRESSURE CONTROL SHOWN “PINCH-OFF” TOOL US D HERE ESEE FIG. A AND FIG. B FIG. B - R

51 Refrigeration System FILTER-DRIERS The filter-driers used on Manitowoc ice machines are manufactured to Manitowoc specifications. The difference

52 Refrigeration System REFRIGERANT DEFINITIONS Recover To remove refrigerant, in any condition, from a system and store it in an external container

53 Section 7 Refrigeration SystemREFRIGERANT RE-USE POLICY Manitowoc recognizes and supports the need for proper handling, re-use, and disposal of,

54 Refrigeration System Section 7HFC REFRIGERANT QUESTIONS AND ANSWERSManitowoc uses R-404A and R-134A HFC refrigerants with ozone depletion potent

55 Section 7 Refrigeration System7. Is other special equipment required to service HFC refrigerants? No. Standard refrigeration equipment such as

2 Electrical System Wiring Diagram Sequence of Operation *OVERLOADFAN CYCLE CONTROLBIN SWITCHTB35TB33(52)(51)(48)CONTACTORCONTACTSL1(42)(66)(64)I

56 Refrigeration System Section 7

Specifications and design are subject to change without notice. MANITOWOC ICE, INC. 2110 South 26th Street P.O. B

3 Electrical System Initial Start-Up Or Start-Up After Automatic Shut-Off (cont.) 2. REFRIGERATION SYSTEM START-UP The compressor starts after the 4

4 Electrical System Freeze Sequence 3. PRE-CHILL *OVERLOADFAN CYCLE CONTROLBIN SWITCHTB35TB33(52)(51)(48)CONTACTORCONTACTSL1(42)(66)(64)ICE THICKNE

5 Electrical SystemFreeze Sequence (cont.) 4. FREEZE The water pump starts after the 30-second pre-chill. An even flow of water is directed across