Q Model Maintenance

Maintenance
You are responsible for maintaining the ice machine in accordance with the instructions in this manual.
Maintenance procedures are not covered by the warranty.
We recommend that you perform the following maintenance procedures every six months to ensure reliable, trouble-free operation and maximum ice production.
Ice Machine Inspection
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.) on the sides or back of the ice machine. There must be adequate airflow
through and around the ice machine to maximize ice production and ensure long component life.
Exterior Cleaning
Clean the area around the ice machine as often as necessary to maintain cleanliness and efficient operation.
Sponge any dust and dirt off the outside of the ice machine with mild soap and water. Wipe dry with a clean, soft cloth.
Heavy stains should be removed with stainless steel wool. Never use plain steel wool or abrasive pads.
They will scratch the panels.
If you do not understand the procedures or the safety precautions that must be followed, call your
local Manitowoc service representative to perform the maintenance procedures for you.
Disconnect electric power to the ice machine and the remote condensing unit at the electric service
switch before cleaning the condenser.
Cleaning the Condenser
A dirty condenser restricts airflow, resulting in excessively high operating temperatures. This reduces
ice production and shortens component life. Clean the condenser at least every six months. Follow the steps below.
1. Clean the outside of the condenser with a soft brush or a vacuum with a brush attachment. Be careful not
to bend the condenser fins.
2. 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 and cautions supplied with the cleaner.
3. Straighten any bent condenser fins with a fin comb. Straighten Bent Condenser Fins
4. Carefully wipe off the fan blades and motor with a soft cloth. Do not bend the fan blades. If the fan
blades are excessively dirty, wash with warm, soapy water and rinse thoroughly.
Disconnect electric power to the ice machine head section and the remote condensing unit at the
electric service switches before cleaning the condenser.
The condenser fins are sharp. Use care whencleaning them.
If you are cleaning the condenser fan blades withwater, cover the fan motor to prevent waterdamage.
WATER-COOLED CONDENSER
AND WATER REGULATING VALVE
Symptoms of restrictions in the condenser water circuit
include:
• Low ice production
• High water consumption
• High operating temperatures
• High operating pressures
If the ice machine is experiencing any of these symptoms, the water-cooled condenser and water regulating valve
may require cleaning due to scale build-up. The cleaning procedures require special pumps and cleaning solutions. Follow the manufacturer’s instructions for the specific cleaner being used.
MANITOWOC’S PATENTED CLEANING OR
SANITIZING TECHNOLOGY
Manitowoc Ice Machines include technology that allows the initiation and completion of a cleaning or sanitizing
cycle at the flip of a switch. This cycle will permit cleaning or sanitizing of all surfaces that come in contact
with the water distribution system. Periodic maintenance must be performed that includes sanitizing the bin (or
dispenser) and adjacent surface areas, which cannot be contacted by the water distribution system.
This technology will also allow initiation and completion of a clean or sanitize cycle, after which the ice machine
automatically starts ice making again. Refer to the cleaning or sanitizing procedure for complete details.
The AuCS Accessory can be set to automatically start and finish a clean or sanitize cycle every 2, 4, or 12
weeks. This accessory monitors ice-making cycles and initiates a cleaning or sanitizing cycle automatically.
Refer to Automatic Cleaning System (AuCS) Accessory for further details.
ALPHASAN®
The goal of AlphaSan is to keep the plastic surfaces of an ice machine cleaner, by reducing or delaying the
formation of bio-film. The active ingredient in AlphaSan is the element silver in the form of silver ions (Ag+).
AlphaSan slowly releases silver ions via an ion exchange mechanism. When AlphaSan is compounded
directly into a plastic part, a controlled release of silver ions from the surface is regulated to maintain an
effective concentration at or near the surface of the plastic ice machine part. AlphaSan’s unique ability to
effectively control the release of silver not only protects against undesired discoloration of the plastic, but also
will last the life of the plastic part. Although AlphaSan helps prevent bio-film build up it does not eliminate the
need for periodic cleaning and maintenance. AlphaSan has no adverse effect on the taste of the ice orbeverage.
Interior Cleaning and Sanitizing
Clean and sanitize the ice machine every six months for efficient operation. If the ice machine requires more
frequent cleaning and sanitizing, consult a qualified service company to test the water quality and recommend appropriate water treatment or installation of AuCS® accessory (Automatic Cleaning System). If required, an extremely dirty ice machine may be taken apart for cleaning and sanitizing.
CLEANING PROCEDURE
Ice machine cleaner is used to remove lime scale or other mineral deposits. It is not used to remove algae or
slime. Refer to the section on Sanitizing for removal of algae and slime.
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 the evaporator.
Step 2 To start cleaning, place the toggle switch in the CLEAN position. The water will flow through the water
dump valve and down the drain. The Clean light will turn on to indicate the ice machine is in the Cleaning mode.
Step 3 Wait about one minute or until water starts to flow over the evaporator.
Step 4 Add the proper amount of Manitowoc Ice Machine Cleaner to the water trough.
Step 5 The ice machine will automatically time out a ten minute cleaning cycle, followed by six rinse cycles,
and stop. The Clean light will turn off to indicate the Cleaning mode is completed.
 This entire cycle lasts approximately 25 minutes.
Step 6 When the cleaning process stops, move the toggle switch to OFF position. Refer to “Sanitizing Procedure”
Step 7
A. The ice machine may be set to start and finish a cleaning procedure then automatically start ice making again.
B. You must wait about one minute into the cleaning cycle (until water starts to flow over the evaporator) then move the switch from CLEAN to ICE position.
C. When the cleaning cycle is completed, an ice making sequence will start automatically.
Use only Manitowoc approved Ice Machine Cleaner (part number 94-0546-3) and Sanitizer (part number
94-0565-3). It is a violation of Federal law to use these solutions in a manner inconsistent with their
labeling. Read and understand all labels printed on bottles before use.
Do not mix Cleaner and Sanitizer solutions together. It is a violation of Federal law to use these solutions
in a manner inconsistent with their labeling.
Wear rubber gloves and safety goggles (and/or face shield) when handling ice machine Cleaner or Sanitizer.
Never use anything to force ice from the evaporator.
Important
After the toggle switch is moved to the ICE position, opening the curtain switch will interrupt the cleaning
sequence. The sequence will resume from the point of interruption when the curtain switch closes.
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 the evaporator.
Step 2 Remove the water curtain, water distribution tube, and the components you want to clean or sanitize.
Disassemble the water distribution tube. See the following pages for removal/disassembly procedures for these parts.
Step 3 Mix a solution of water and sanitizer.
Step 4 Use the sanitizing solution and a sponge or cloth to sanitize (wipe) all parts and interior surfaces of
the ice machine. Sanitize the following areas:
A. Side walls B. Base (area above water trough) C. Evaporator plastic parts D. Water Distribution tube exterior and interior surfaces. Remove water distribution tube Orings then sanitize o-rings and distribution tube E. Water pump discharge tubing
F. Exterior plastic of water pump G. Ice thickness probe and water level probe H. Bin or dispenser
Step 5 Rinse all sanitized areas with clear water.
Step 6 Install the removed parts, restore power and place toggle switch in the clean position. The water will
flow through the water dump valve and down the drain. The Clean light will turn on to indicate the ice machine is
in the Cleaning mode.
Step 7 Wait about two minutes or until water starts to flow over the evaporator.
Step 8 Add the proper amount of Manitowoc Ice Machine sanitizer to the water trough.
Step 9 The ice machine will automatically time out a ten minute sanitizing cycle, followed by six rinse cycles,
and stop. The Clean light will turn off to indicate theCleaning cycle is completed.
This entire cycle lasts approximately 30 minutes.
Step 10 Move toggle switch from CLEAN to OFF, then back to CLEAN. Repeat steps 7, 8 and 9.
Step 11 When the sanitizing process stops, move the toggle switch to ICE position.
Never use anything to force ice from the evaporator. Disconnect electric power to the ice machine (and
dispenser if applicable) at the electric switch box before proceeding.
Solution Type Water Mixed With Sanitizer 4 gal. (15 l) 3 oz (118 ml) sanitizer
AUTOMATIC CLEANING SYSTEM (AuCS®)
This accessory monitors ice making cycles and initiates cleaning (or sanitizing) procedures automatically. The
AuCS® Accessory can be set to automatically clean or sanitize the ice machine every 2, 4, or 12 weeks.
Automatic Operation
The following occurs when the toggle switch is in the ICE position:
• The ice machine control board counts the number of
ice harvest cycles.
• The AuCS® accessory interrupts the ice making
mode and starts the cleaning (or sanitizing) mode
when the harvest count equals the “Frequency of
Cleaning” setting of the AuCS®.
• When the automatic cleaning (or sanitizing) cycle is
complete (approximately 25 minutes), ice making
resumes automatically, and the “Harvest Count” is
reset to zero.
Manual Start Operation
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 the evaporator.
Step 2 To start the automatic cleaning system, move the toggle switch to the CLEAN position. The water will
flow through the water dump valve and down the drain. The Clean light will turn on to indicate the ice machine is
in the Self Cleaning mode. The AuCS® then automatically adds cleaner or sanitizer to the ice machine.
Step 3 The ice machine will automatically time out a ten minute cleaning or sanitizing cycle, followed by six
rinse cycles, (de-energize the Clean light) and stop. This entire cycle lasts approximately 25 minutes.
Step 4 After the cleaning or sanitizing cycle stops, move the toggle switch to ICE position.
Step 5 A. The ice machine may be set to start and finish a cleaning or sanitizing cycle, then automatically
start ice making again. B. You must wait about one minute into the cleaning cycle (until water starts to flow over the
evaporator), then move the toggle switch from CLEAN to ICE position. C. When the cleaning or sanitizing cycle is
completed, the clean light will turn off and an ice making sequence will start automatically.
Refer to the AuCS® Accessory Installation - Use and Care Manual for complete details on the
installation, operation, maintenance and cautionary statements of this accessory.
Opening the curtain switch will interrupt the cleaning or sanitizing sequence. The sequence will resume
from the point of interruption when the curtain recloses. Never use anything to force ice from the evaporator.
REMOVAL OF PARTS FOR CLEANING/SANITIZING
1. Turn off the water supply to the ice machine at the water service valve.
2. Remove the water curtain, water distribution tube, and the components you want to clean or sanitize.
Disassemble the water distribution tube. See the following pages for removal/disassembly procedures for these parts.
3. Soak the removed part(s) in a properly mixed solution. The water distribution tube must be disassembled prior to soaking.
4. Use a soft-bristle brush or sponge (NOT a wire brush) to carefully clean the parts.
5. Use the solution and a brush to clean the top, sides, and bottom evaporator extrusions; the inside of the
ice machine panels; and the entire inside of the bin. 6. Thoroughly rinse all of the parts and surfaces with clean water.
7. Install the removed parts. NOTE: Incomplete rinsing of the ice thickness probe or water level probe may leave a residue. This could cause the ice machine to malfunction. For best results, brush or wipe the probes off while rinsing it. Thoroughly dry the probes before installing them. 8. Turn on the water and electrical supply. Disconnect electric power to the ice machine at the electric switch box before proceeding. Wear rubber gloves and safety goggles (and/or face shield) when handling Ice Machine Cleaner or Sanitizer. Do not mix Cleaner and Sanitizer solutions together. It is a violation of Federal law to use these solutions in a manner inconsistent with their labeling. Do not immerse the water pump motor in the cleaning or sanitizing solution.
Water Dump Valve
The water dump valve normally does not require removal for cleaning. To determine if removal is necessary:
1. Locate the water dump valve.
2. Set the toggle switch to ICE.
3. While the ice machine is in the freeze mode, check the dump valve’s clear plastic outlet drain hose for leakage.
A. If the dump valve is leaking, remove, disassemble and clean it. B. If the dump valve is not leaking, do not remove
it. Instead, follow the “Cleaning Procedure” on
Follow the procedure below to remove the dump valve.
1. If so equipped, remove the water dump valve shield from its mounting bracket.
2. Lift and slide the coil retainer cap from the top of the coil.
3. Note the position of the coil assembly on the valve for assembly later. Leaving the wires attached, lift the coil assembly off the valve body and the enclosing tube.
4. Press down on the plastic nut on the enclosing tube and rotate it 1/4 turn. Remove the enclosing tube, plunger, and plastic gasket from the valve body. NOTE: At this point, the water dump valve can easily be cleaned. If complete removal is desired, continue with step 5. Dump Valve Removal NOTE: During cleaning, do not stretch, damage or remove the spring from the plunger. If it is removed, slide the spring’s flared end into the plunger’s slotted top opening until the spring contacts the plunger spring stop. 5. Remove the valve body. 6. Remove the tubing from the dump valve by twisting the clamps off.
7. Remove the two screws securing the dump valve and the mounting bracket. Dump Valve Disassembly
Disconnect the electric power to the ice machine at the electric service switch box and turn off the water supply before proceeding. The plunger and the inside of the enclosing tube must be completely dry before assembly.
Water Pump
1. Disconnect the water pump power cord. Water Pump Removal
2. Disconnect the hose from the pump outlet.
3. Loosen the screws securing the pump mounting bracket to the bulkhead.
4. Lift the pump and bracket assembly off the screws. Ice Thickness Probe
1. Compress the side of the ice thickness probe near the top hinge pin and remove it from the bracket. Ice Thickness Probe Removal NOTE: At this point, the ice thickness probe can easily be cleaned. If complete removal is desired, continue with
step 2 below.
2. Disconnect the wire lead from the control board inside the electrical control box. Ice Thickness Probe Cleaning
1. Mix a solution of Manitowoc ice machine cleaner and water (2 ounces of cleaner to 16 ounces of water) in a container.
2. Soak ice thickness probe in container of cleaner/ water solution while disassembling and cleaning water circuit components (soak ice thickness probe for 10 minutes or longer).
3. Clean all ice thickness probe surfaces including all plastic parts (do not use abrasives). Verify the ice thickness probe cavity is clean. Thoroughly rinse ice thickness probe (including cavity) with clean water, then dry completely. Incomplete rinsing and
drying of the ice thickness probe can cause premature harvest.
4. Reinstall ice thickness probe, then sanitize all ice machine and bin/dispenser interior surfaces.
Disconnect the electric power to the ice machine at the electric service switch box and turn off the water supply.
Water Level Probe
1. Loosen the screw that holds the water level probe in place. The probe can easily be cleaned at this point
without proceeding to step 2. 2. If complete removal is required, disconnect the wire lead from the control board inside the electrical control box. Water Level Probe Removal Water Inlet Valve The water inlet valve normally does not require removal for cleaning. Follow the instructions below to determine if removal is necessary.
1. Set the ICE/OFF/CLEAN switch to OFF. Locate the water inlet valve (in the compressor area of the ice machine). It pours water into the water trough. 2. When the ice machine is off, the water inlet valve must completely stop water flow into the machine. Watch for water flow. If water flows, remove, disassemble and clean the valve.
3. When the ice machine is on, the water inlet valve must allow the proper water flow through it. Set the toggle switch to ON. Watch for water flow into the ice machine. If the water flow is slow or only trickles into the ice machine, remove, disassemble, and clean the valve. Follow the procedure below to remove the water inlet valve.
1. Remove the valve shield if necessary. 2. Remove the filter access screws that hold the valve in place.
NOTE: The water inlet valve can be disassembled and cleaned without disconnecting the incoming water
supply line to the ice machine. 3. Remove, clean, and install the filter screen. 4. If necessary, remove the enclosure tube access
screws to clean interior components. Water Inlet Valve Removal Exploded View of Water Inlet Valve
Disconnect the electrical power to the ice machine at the electrical disconnect before proceeding.
Water Distribution Tube
1. Disconnect the water hose from the distribution tube. Water Distribution Tube Removal
1. Loosen the two thumbscrews which secure the distribution tube.
2. Lift the right side of the distribution tube up off the locating pin, then slide it back and to the right.
3. Disassemble for cleaning/sanitizing. A. Twist both of the inner tube ends until the tabs line up with the keyways.
B. Pull the inner tube ends outward. Water Distribution Tube Disassembly Water Curtain
1. Gently flex the curtain in the center and remove it from the right side. Water Curtain Removal 2. Slide the left pin out.
Do not force this removal. Be sure the locating pin is clear of the hole before sliding the distribution tube out.
Removal from Service/Winterization
Special precautions must be taken if the ice machine is to be removed from service for an extended period of
time or exposed to ambient temperatures of 32°F (0°C) or below.
SELF-CONTAINED AIR-COOLED ICE MACHINES
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 and drain the incoming ice-making water line at the rear of the ice machine. 5. Blow compressed air in both the incoming water and the drain openings in the rear of the ice machine
until no more water comes out of the inlet water lines or the drain. 6. Make sure water is not trapped in any of the water
lines, drain lines, distribution tubes, etc.
WATER-COOLED ICE MACHINES
1. Perform steps 1-6 under “Self-Contained Air-Cooled Ice Machines.”
2. Disconnect the incoming water and drain lines from the water-cooled condenser.
3. Insert a large screwdriver between the bottom spring coils of the water regulating valve. Pry upward to open the valve.
Pry Open the Water Regulating Valve 4. Hold the valve open and blow compressed air through the condenser until no water remains.
REMOTE ICE MACHINES
1. Move the ICE/OFF/CLEAN switch to OFF. 2. “Frontseat” (shut off) the receiver service valves. Hang a tag on the switch as a reminder to open the valves before restarting. 3. Perform steps 1-6 under “Self-Contained Air-Cooled Ice Machines.”
If water is allowed to remain in the ice machine in freezing temperatures, severe damage to some
components could result. Damage of this nature is not covered by the warranty.