Welbilt Manitowoc Indigo NXT Series User manual

Restoring Ice Machine
to Service Subject: Indigo NXT Ice Machines
AIR-COOLED, WATER-COOLED, REMOTE AIR-COOLED &
QUIETQUBE ICE MACHINES
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Document Number: MSC-017 4/20
MANITOWOC ICE MACHINE DIVISION
2110 SOUTH 26TH STREET, MANITOWOC, WI 54220
844-724-CARE
WWW.MANITOWOCICE.COM
RESTORING TO SERVICE PROCEDURES
1. Remove front panel.
Use a Phillips screwdriver to
loosen the screw(s) securing
the door. Do not remove
screw(s) completely; they
are secured to prevent loss.
2. Make sure ice machine
off.
Turn the ice machine OFF
by pressing the power
button.
3. Disconnect main
power at the service
disconnect or breaker.
nWARNING
Do not begin cleaning
other parts of the ice
machine until line voltage is
disconnected from the ice
machine and if applicable
dispenser.
4. Empty ice bin, if not
already empty.
Use an ice scoop to remove
all ice from the storage bin
or dispenser.
5. Remove top cover and
evaporator dust cover
(when used).
Lift top cover to remove,
then lift and remove
evaporator dust cover.
6. Remove water curtain
or splash shield.
Remove water curtain
Gently flex the curtain in the
center and remove it from
the right side.
Slide the left pin out.
Manitowoc recommends a Factory Authorized Service company or Distributor Authorized Service Dealer perform
thorough preventative maintenance prior to restoring service of the Manitowoc ice machine, storage bin or
dispenser. Section 4 (Maintenance) of the Installation, Operation and Maintenance manual should be followed to
ensure proper cleaning and sanitizing steps are completed.
Water system components including the water inlet valve, water pump and dump valve may require removal for
inspection or replacement depending on the potable water quality and the length of time the components had no
use. Water cooled ice machines may require the condenser be cleaned and the refrigeration water regulating valve
evaluated for proper performance. Air-cooled condensers should be cleaned. This is also a good time to replace
water filtration, replenish AuCS chemical and replace the Luminice bulb if these Manitowoc accessories are used.

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Document Number: MSC-017 4/20
Subject: Restoring Ice Machine to Service Procedures
Remove splash shield
48” models.
Lift the splash shield up and
forward to remove.
Remove splash shields (2)
Dual Evaporator Models.
Grasp the top center of
splash shields. Lift up and
then out.
7. Remove water trough
Depress tabs on right and
left side of the water trough.
Allow front of water trough
to drop as you pull forward
to disengage the rear pins.
Refer to Step 12 for Dual
Evaporator Trough Removal.
8. Remove the water
level probe.
Pull the water level probe
straight down to disengage.
Lower the water level probe
to obtain access. The water
level probe can be descaled
and sanitized at this point
without complete removal.
If complete removal is
desired, disconnect the ice
thickness control wire from
the control board.
NOTE: Some models allow
disconnection of the wire
lead from the water level
probe. Lower the water
level probe until the wiring
connector is visible, then
disconnect the wire lead
connector from the water
level probe and remove
from the ice machine.
Refer to Step 11 for Dual
Evaporator Water Pump and
Water Level Probe Assembly
Removal.
9. Remove the water
pump.
Grasp pump and pull
straight down on pump
assembly until disengaged
and the electrical connector
is visible. Disconnect
the electrical connector.
Remove the water pump
assembly from ice machine.
Refer to Step 11 for Dual
Evaporator Water Pump and
Water Level Probe Assembly
Removal.

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Document Number: MSC-017 4/20
Subject: Restoring Ice Machine to Service Procedures
Remove Ice damper(s)
when used. (Dual
Evaporators have two).
Disengage the front and rear
pins of the left damper and
right damper.
10. DUAL EVAPORATORS
ONLY: Remove the
water trough shield.
Grasp the water trough
shield in the center and the
left end.
Flex the water trough shield
in the center and pull the
left end forward until clear
of the side wall. Repeat for
the right end.
Pull water trough shield
forward to remove.
11. Remove the water
pump and water level
probe assembly.
The water pump and water
level probe are removed
from the front right side
of the machine. Pull up on
the water pump and water
level probe assembly to
disengage.
The water pump and water
level probe can be descaled
and sanitized at this point
without complete removal.
If complete removal is
desired, disconnect at the
molex connectors.
12. Remove water trough.
Once the water pump
and water level probe are
removed (step 11); slide the
water trough forward-out of
the ice machine.
13. Remove the ice
thickness probe(s)
(Dual Evaporator have
two).
Compress the hinge pin on
the top of the ice thickness
probe.
Pivot the ice thickness probe
to disengage one pin then
the other.
The ice thickness probe
can be cleaned at this point
without complete removal.
If complete removal is
desired, disconnect the ice
thickness control wiring
from the control board.
14. Remove the water
distribution tube(s)
(Dual Evaporator have
two).
Loosen the two outer
screws (do not remove
screws completely; they
are retained to prevent
loss). Pull forward on the
distribution tube to release
from slip joint. Remove the
water distribution tube.
Disassemble the distribution
tube by loosening the two
(2) middle thumbscrews and
dividing the distribution
tube into two pieces.
Remove both water
distribution tubes on 48”
and dual evaporator models.

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Document Number: MSC-017 4/20
Subject: Restoring Ice Machine to Service Procedures
nWARNING
Wear rubber gloves and safety goggles (and/or face shield)
when handling ice machine cleaner / descaler or sanitizer.
Cleaner / Descaler (9405463)
and Sanitizer (9405653)
Usage
Important
Ice machine cleaner /descaler is
used to remove lime scale and
mineral deposits. Ice machine
cleaner / descaler should
be used every six months,
although in cases of extremely
hard water conditions it may
be necessary to descale more
often. For the range of water
hardness allowed for potable
water standards, it should not
be necessary to descale more
frequently than every two
months. Use of an approved
filtration system with a
polyphosphate scale inhibitor
is highly recommended for all
ice machine installations and
will significantly reduce the
need to descale in hard water
applications.
Ice machine sanitizer disinfects
and removes algae and slime.
Sanitizer must be used a
minimum of once every six
months.
,CAUTION
Do not immerse the water
pump motor or electrical
connector in liquids. Only
soak the water pump
impeller and impeller
housing. Do not immerse
above the red line on the
graphic.
Notice
Electrical connectors must never be exposed to any
liquids.
15. Remove scale deposits
from removed parts.
Mix 16 oz Manitowoc ice
machine cleaner / descaler
(9405463) with one gallon of
potable water in a three-
compartment sink.
Place the plastic parts in the
solution and allow to soak
for 10-15 minutes. Use a
soft bristle brush on heavy
scale or mineral buildup as
required.
16. Clean scale deposits
from surface areas of
ice machine.
Use a clean towel or sponge
soaked in cleaner / descaler
solution to wipe ice machine
surfaces, including the sides
walls, base (area above
water trough), and the bin
or dispenser.
17. Rinse Surface Areas of
Ice Machine.
Use a clean towel or sponge
soaked in potable water to
wipe ice machine surfaces,
including the sides walls,
base (area above water
trough), and the bin or
dispenser.
,CAUTION
Do not soak the water pump
motor in rinse water or
sanitizer solution. Be sure
to only rinse/soak the water
pump impeller and impeller
housing. Do not immerse
above the red line on the
graphic.
Notice
Electrical connectors must never be exposed to any
liquids.

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Document Number: MSC-017 4/20
Subject: Restoring Ice Machine to Service Procedures
18. Rinse and sanitize
plastic parts.
Mix two ounces of ice
machine sanitizer (9405653)
with three gallons of
potable water in a three-
compartment sink.
Add five gallons of clear
potable water to third sink
compartment. Remove
plastic parts from cleaner
/ descaler solution & rinse
in clear potable water.
Place the plastic parts in
the sanitizer solution and
allow to soak for at least one
minute.
19. Sanitize surface areas
of ice machine.
Use a clean sanitizer-soaked
towel to sanitize ice machine
surfaces, including the side
walls, base (area above
water trough), and the bin
or dispenser. Spray surfaces
with sanitizer solution and
wipe down. Manitowoc
sanitizer is classified as a no
rinse sanitizer - Do not rinse
sanitized surfaces.
Notice
When re-installing the water level probe, ensure the
rubber gasket is sealed against the base of the ice
machine and that any electrical connectors or wires
remain free from moisture.
20. Reinstall plastic
evaporator parts.
Return the parts to the ice
machine and reassemble.
(Perform Steps 6 to 13 in
reverse order).
21. Restore power to the
ice machine.
Restore power to the ice
machine (and dispenser if
applicable) at the circuit
breaker.
22. Press CLEAN button.
Follow the screen prompts
to start the clean cycle.
Wait until the prompt to
add cleaner is displayed
(approximately 2 minutes)
then continue with next
step.
23. Add Manitowoc
cleaner / descaler
(9405463) to water
trough.
Add the correct amount
of cleaner / descaler for
your model by pouring
between the evaporator and
water curtain. The bottle
is marked with 2 oz (60ml)
graduations.
IF0300/IT0420/IT0520
IT0620
3 ounces
IT0450/IT0500/IP0500
IF0600/IBF0620C/IT0750
IBF0820C IF0900/IT0900/
IBT1020C/IT1200
5 ounces
IF1400C/IT1500/IF1800C
IT1900/IF2100C
9 ounces

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Document Number: MSC-017 4/20
Subject: Restoring Ice Machine to Service Procedures
24. Allow clean cycle to
run.
The ice machine will
automatically run through a
wash cycle and several rinse
cycles. The entire cycle lasts
approximately 30 minutes.
Countdown clock will let
you know duration and time
remaining.
25. Press the CLEAN
button.
Follow the screen prompts
to start the sanitize cycle.
Wait until the prompt to
add sanitizer is displayed
(approximately 2 minutes)
then continue with next
step.
26. Add Manitowoc
sanitizer (9405653) to
the water trough.
Add the correct amount
of sanitizer for your model
by pouring between the
evaporator and water
curtain. The bottle is
marked with 2 oz (60ml)
graduations.
IF0300/IT0420/IT0450
IT0500/IP0500/IT0520
IF0600/IT0620/IBF0620C
IT0750/IBF0820C/IF0900/
IT0900/IT1200
3 ounces (90ml)
IBT1020C
3.5 ounces (104ml)
IT1500/IT1900/
6 ounces (180ml)
IF1400C/IF1800C/IF2100C
12 ounces (355ml)
27. Reinstall evaporator
dust cover and top
cover (when used).
Reinstall evaporator dust
cover and then reinstall top
cover.
28. Press the POWER
button.
After the sanitizing cycle is
complete, press the power
button to return to making
ice.
29. Reinstall front panel
and tighten screws.
30. Clean exterior.
Wipe surfaces with a damp
cloth rinsed in water to
remove dust and dirt from
the outside of the ice
machine.