Follett R400A-W, D400A-W, MCD400A-W, MFD400A-W, T400A-W User Manual

T400A/W, MCD400A/W, R400A/W,

MFD400A/W, D400A/W Icemakers

Order parts online
www.follettice.com

Installation, Operation and Service Manual

Following installation, please forward this manual

to the appropriate operations person.

801 Church Lane • Easton, PA 18040, USA
Toll free [phone] • [phone]
Fax [phone] • www.follettice.com

208600R13

Follett Corporation
Equipment Return Policy

Follett equipment may be returned for credit under the following conditions:

1. The equipment is new and unused.

2. A return authorization number has been issued by customer service within 30 days after shipment.

3. Follett receives the equipment at the factory in Easton, PA within 30 days after issuance of the return authorization number.

4. The equipment must be returned in Follett packaging. If the packaging has been damaged or discarded, Follett will forward, at
the customer’s expense, new packaging.

Note: Return freight charges are the responsibility of the customer. If equipment is returned and is damaged because of

improper packaging, Follett Corporation will not be held responsible.

Credit will be issued when:
The equipment has been inspected by Follett and deemed suitable to be returned to stock.

Note: A 15% restocking charge will be deducted from the credit. If the cost to return the product to stock exceeds 15%, the

actual cost will be deducted.

2

Table of contents

Welcome to Follett Corporation
Specifications
Installation

Top mount icemakers (models T400A/W, MCD400A/W and MFD400A/W)
Satellite-fill icemakers (models MCD400A/W, R400A/W)
Ventilation
Ice transport tube

Start up

Operation

Cleaning
Weekly exterior care
Monthly condenser cleaning

Semi-annual evaporator cleaning

Service

Icemaker operation
Technical specifications
Refrigeration system diagram
Refrigeration pressure data
Compressor data
Gearmotor data
MCD400A/W wiring diagram
Electrical control system operation
Refrigeration system
Service procedures
Evaporator disassembly
Evaporator reassembly
Gearmotor replacement

Troubleshooting
Replacement parts

4
5
7
7

8
13
14
16
16
16
16
17
17
18
18
19
19
19
19
20
20
21
27
28
28
28
28
29
31

3

Welcome to Follett

Follett equipment enjoys a well-deserved reputation for excellent performance, long-term reliability and
outstanding after-the-sale support. To ensure that this equipment delivers that same degree of service, we ask
that you review the installation portion of this manual before beginning to install the unit. Our instructions are
designed to help you achieve a trouble-free installation. Should you have any questions or require technical
help at any time, please call our technical service group at [phone] or [phone].

Before you begin

After uncrating and removing all packing material, inspect the equipment for concealed shipping damage. If damage is
found, notify the shipper immediately and contact Follett Corporation so that we can help in the filing of a claim,
if necessary.

Check your paperwork to determine which model you have. Follett model numbers are designed to provide information
about the type and capacity of Follett equipment. Following is an explanation of the different model numbers in the
400 series.

MCD400ABT

Icemaker capacity and refrigerant

400 – 400 lbs (181kg)/day, R404A

Voltage

D – 115V 60Hz

Icemaker series

Nugget icemaker
MCD – Satellite-fill installation, Vision™ ice and beverage dispensers and

R – Remote installation, Symphony
D – Replacement icemaker, Symphony ice and water dispensers
Flake icemaker
MFD – Top installation, Follett ice storage bins

!

Important cautions

top installation, Follett ice storage bins

™

ice and water dispensers

Condenser type

A – air-cooled
W – water-cooled

Application

V – Vision
B – Bin
H – Harmony

Configuration

S – Satellite-fill
T – top-mount

™

Moving parts. Do not operate with front cover removed.

Hot parts. Do not operate with cover removed.

To reduce risk of shock disconnect power before servicing.

Most ice machine cleaners contain citric or phosphoric acid, which can cause skin irritation. Read caution
label on product and follow instructions carefully.

Ice is slippery. Maintain counters and floors around dispenser in a clean and ice-free condition.

Ice is food. Follow recommended cleaning instructions to maintain cleanliness of delivered ice.

4

Specifications

Electrical

Each icemaker and dispenser require a separate circuit with electrical disconnect within 10 ft (6m).
Equipment ground required.
Standard electrical – 115V, 60Hz, 1 phase.
Maximum dispenser fuse – 15 amps,
Maximum icemaker fuse – 20 amps each
Maximum icemaker amperage – 11 amps each
Cord and plug provided on icemaker and dispenser

Electrical connections

Model Electrical connection Circuits required

25FB400A/W, 50FB400A/W, 110FB400A/W cord & plug provided 115/60/1, 20 amp max. fuse size

25CT400A/W, 50CT400A/W, 110CT400A/W cord & plug provided 115/60/1, 20 amp max. fuse size

25CR400A/W, 50CR400A/W, 110CR400A/W dispenser, icemaker 115/60/1, (2) circuits required
and bin signal: dispenser: 15 amp max. fuse size
cord & plug provided icemaker: 20 amp max. fuse size

VU155R400A/W, VU300R400A/W dispenser, icemaker 115/60/1, (2) circuits required
VU155BR400A/W, VU300BR400A/W and bin signal: dispenser: 15 amp max. fuse size
VU155R400A/WX, VU155BR400A/WX cord & plug provided icemaker: 20 amp max. fuse size

VU155NR400A/W, UD300R400A/W dispenser, icemaker 115/60/1, (3) circuits required
VU155R800A/W, VU300R800A/W, and bin signal:
VU155R800A/WX, cord & plug provided dispenser: 15 amp max. fuse size
VU155BR800A/W, VU300BR800A/W, (2) icemakers: 20 amps max. fuse
VU155R800A/WX size each

Plumbing

3/8" OD push-in water inlet
3/4" MPT drain
3/8" FPT condenser inlet (water-cooled condenser only)
3/8" FPT condenser drain (water-cooled condenser only)

Notes: Slope to drain of 1/4" per foot (6mm per 30.4cm run) with a 1/2" min. is recommended.
Water shut-off recommended within 10 feet (3m), drain to be hard piped and insulated.
Separate drains for icemaker and condenser. To prevent back flow, do NOT connect drains.
Follett recommends installation of an activated carbon filter in icemaker inlet water line.

Ambient

Air temperature 100˚ F/38˚ C max. 50˚F/10˚C min. (best performance below 80˚F/27˚C)
Water temperature 90˚F/32˚C max. 40˚F/4˚C min. (best performance below 70˚F/21˚C)
Water pressure 70 P.S.I max. (482 kPA) 10 P.S.I. min. (89 kPA)

5

Dimensions and clearances

Entire front of icemaker must be clear of obstructions/connections to allow removal.

12" (305mm) clearance above icemaker for service.

6" (153mm) minimum clearance between exhaust side of icemaker and any adjacent equipment.

MCD400A & R400A – 18" (457mm) minimum, 10 ft (3m) maximum clearance between discharge and air
intake grilles.

Front view — air-cooled

top mount

Front view — air-cooled

Satellite-fill

1.875" (48mm)

Back view — air-cooled

top mount

13.00"

(331mm)

4.875"

(124mm)

2.375"

(61mm)

C

B

A

Front view — water-cooled

Satellite-fill

Back view — water-cooled

top mount

C

F

B

A

12.875"

(327mm)

8.375"

(213mm)

4.75"

(121mm)

2.25"

(57mm)

1.875" (48mm)

7.00" (178mm)

C

D

E

F

B

A

6.875"

(175mm)

2"

(51mm)

Side view — air-cooled and water-cooled

top mount and Satellite-fill

22.75" (578mm)

20.75" (527mm)

17.00"

(432mm)

Satellite-fill air-cooled units only

A – 3/4" MPT drain
B – 3/8" OD push-in water inlet
C – Electrical cord

Icemaker plug

configuration

NEMA 5-20

D – 3/8" FPT condenser inlet
E – 3/8" FPT condenser drain
F – Bin signal cord

6

Installation

Icemaker performance is very sensitive to the quality of installation. To ensure proper performance, ease of
service and warranty coverage, it is critical that you follow the requirements detailed in this manual. If you cannot
meet these requirements or have questions, call our technical service group immediately at [phone] or
[phone].

Top mount icemaker on bin installation procedure
(models MCD400A/WBT and MFD400A/WBT)

Install icemaker and rough-in utilities

1. Install ice storage bin in its final location.

2. Install one supplied grommet in large knockout in base of icemaker and second supplied grommet in ice
hole provided in top of ice storage bin.

3. Rough in plumbing and electrical per specs provided.

4. Flush all water lines before final hook up.

5. Position icemaker with utility connections facing rear of bin.

A. If new storage bin and icemaker – position icemaker with connections facing rear of bin.
B. If using existing bin – place supplied gasket 2.5" (64mm) from front of bin (Fig. 2). Position icemaker

with utility connections facing rear of bin.

6. Make final plumbing and electrical connections.

7. Working from inside bin storage area, push end of transport tube without fasteners up through grommets
into icemaker, leaving about 2" (51mm) hanging down in bin.

8. Route free end of tube to evaporator port.

9. Slip a hose clamp in free end of tube.

10. Push free end of tube on evaporator port and tighten clamp, making sure clamp is positioned on evaporator
side of flange (no flange on MFD400 series flake icemaker).

11. Position ice tube under float bracket retaining tab.

12. Carefully slip ice level control stat alongside transport tube through both grommets and down into bin.

13. Run ice level control stat down through one side of cap tube fasteners attached to ice transport tube, form a
180˚ bend at end of tube and run back up through fastener (Fig. 1).

14. Adjust loop length to provide desired ice level. Loop must below end of ice transport tube.

15. Carefully bend end of cap tube to prevent it from slipping out of clamp.

Fig. 1

ice level control

stat fastener

ice level control stat

bin top

ice transport tube

Apply supplied gasket to bin top
as shown. Position icemaker on
bin top.

Fig. 2 – Replacing existing icemakers

bin top

existing gasket

top view shown

add gasket

front of icemaker

(64mm)

Before turning power on

1. Clean and sanitize ice storage bin in accordance with cleaning procedure in ice storage bin installation
information packed with ice storage bin.

2. Turn water to icemaker on.

3. Remove cover on float reservoir.

4. Push down on float to force water out overflow tube and into evaporator drain pan.

5. Check that water drains freely from evaporator drain pan.

6. Lift float and check that float valve shuts off incoming water when raised.

7

2.5"

After turning power on

1. Turn power to icemaker on and confirm that gearmotor, compressor and fan motor start immediately.

2. Check that ice begins to enter bin within approximately 10 minutes.

3. With icemaker running, check that float reservoir water level is approximately 3/8" (10mm) below internal
overflow and adjust to this level (raised line on side of reservoir) if necessary.

4. After making ice for 10 minutes, put ice against ice level control stat cap tube and check that icemaker
shuts down.

5. Warm ice level control stat with your fingers and check that icemaker restarts in approximately 20 minutes.
(Bin must be calling for ice.)

Satellite-fill icemaker installation procedure
(models MCD400A/WHS and MCD400A/WVS)

Satellite-fill icemaker performance is very sensitive to the quality of installation. To ensure proper performance, ease
of service and warranty coverage. it is critical that you follow the requirements detailed in this manual. If you can not
meet these requirements or have questions, call our technical service group immediately at [phone] or (610)
252-7301.

Installing Satellite-fill icemaker and rough-in utilities without optional slide-out accessory

The requirements below are for icemaker installation without the Follett slide-out accessory. These procedures
ensure that the icemaker can be easily removed as one unit for cleaning and maintenance. For installation with the
slide-out accessory, refer to instructions to install icemaker and rough-in utilities with optional slide-out accessory.

General requirements

Front of icemaker free of obstructions, plumbing lines, electric conduits.
12" (305mm) minimum clearance above icemaker for access to icemaker components.
6" (153mm) minimum clearance between exhaust side of icemaker and adjacent equipment.
Do NOT weld icemaker to counter channels.
Large, removable panels in counter face to allow icemaker removal.
Machine stand accessory required for icemakers not supported on counter channels.

Connection requirements

Compression fittings for water and drain lines.
Separate drains for condenser and icemaker. Do NOT connect drains.
20 amp power supply with 6 feet.

bin signal from
dispenser
to icemaker

12"
305mm

separate power
to dispenser

front of
icemaker
clear

clearance

separate power
to icemaker

water shut off

compression fittings
for water and drain lines

Note: Diagram intended as guide only. All field wiring to be installed in accordance with NEC and
local electrical codes.

8

Field wiring diagrams for Satellite-fill icemaker installations

All field wiring must be installed in accordance with NEC and local electrical codes.

Field wiring diagram is intended only to aid electrician or technician in understanding how equipment works.

Should local codes require a hard-wired connection and/or shielded wiring, eliminate the cord and plug(s) and
follow the appropriate field wiring diagram.

MCD400A/W and R400A/W icemakers have separate power supply from dispenser.

Electric disconnects required within 10 ft (3m) for all hard-wired connections.

Recommended junction box preparation of
hard-wired Satellite-fill icemakers.

1. Cut plugs from supplied power cords.

2. Replace upper (power) strain relief with
a cord connector.

3. Mount two 2" x 4" junction boxes using
supplied holes in icemaker face.

4. Make power and bin signal connections.

25, 50 or 110 ice and water dispenser with ONE Satellite-fill icemakers (dispenser models

25CR400A/W, 25HR400A/W, 50CR400A/W, 50HR400A/W, 110CR400A/W)

Electric
power
source

Upper icemaker
junction box
(power)

GNDGRN

X

W

B

LEGEND

WIRENUT FIELD
CONNECTIONS

EQUIPMENT

X

GROUND

B BLACK

WHITE

W

GREEN

GRN

BL BLUE

YELLOW

Y

RED

RD

Dispenser
junction box

GNDGRN

X

B

W

R

Electric
power
source

Lower icemaker
junction box
(bin signal)

W

B

VU155/VU300 ice and beverage dispenser with either ONE or TWO Satellite-fill icemakers

Note: 24V bin signal; Verify black bin signal wire is on the 24V terminal

Icemaker #1

Electric
power
source

Left junction box

W

B

GND

GRN

DISPENSER

Right junction box

BL

RD

(optional)

Lower junction box
(24V bin signal)

Y

Icemaker #2
(optional)

Lower junction box
(24V bin signal)

9

Electric
power
source

B

W

Electric
power
source

W

B

Upper junction box
(power)

GND

Upper junction box
(power)

GND

X

X

W

B

GRN

W

B

GRN

Installing Satellite-fill icemaker and rough-in utilities with optional slide-out accessory

The slide-out accessory allows the icemaker to be pulled out on a track from below a counter without
disconnecting utilities. A leg supports the icemaker in the full-out position. If your order did not include a
slide-out accessory proceed to icemaker ventilation and exhaust.

Step 1 – Installing track accessory (Follow either A or B below for Satellite-fill icemaker)

Track must be positioned flush against inside of counter and slightly above counter access opening.

A. When icemaker stand is used (required if icemaker is not supported on counter channels)

1. Bolt vertical utility panel to slide-out track assembly with supplied 10/32 screws.

2. Secure slide-out track assembly to icemaker stand with 10/32 screws provided.

3. Position icemaker stand in desired location and adjust stand legs to proper height and level in
both directions.

4. Using holes in flanged legs as template, mark floor for 12 anchoring holes to be drilled.

5. Remove stand/track assembly and drill marked holes.

6. Reposition and anchor stand to floor with 12 fasteners appropriate to floor material (not supplied).

Stand MUST be anchored to avoid tipping and possible injury when icemaker is pulled out.

B. When icemaker is supported on counter channels

1. Bolt vertical utility panel to slide-out track assembly with supplied 10/32 screws.

2. Position track assembly on counter channels (Fig. 3).

3. Using holes in track assembly as a template, mark and drill required holes in counter channels.

4. Remove track assembly on channels and drill marked holes.

5. Reposition track assembly on channels and secure using appropriate hardware (not supplied).

14"

(356mm)

12.75

(324mm)

14"

(356mm)

13"

(331mm)

slide-out-track

verical utility panel

10

Step 2 – Installing Satellite-fill icemaker on slide-out track

A. When icemaker is shipped with slide-out track accessory (follow either A or B)

1. Connect inlet water, drain, and power supply to back of vertical utility panel.

2. Place icemaker on slide-out track assembly.

3. Connect drain and water lines.

4. Connect electrical plugs from icemaker to utility panel.

B. When icemaker is installed in and shipped with counter

1. Remove two outer rear screws from icemaker and install supplied spacer and screw (Fig. 3).

2. Place icemaker on slide-out track assembly.

3. Connect drain and water lines.

4. Connect electrical plug from icemaker to utility panel.

5. Remove pin from adjustable leg.

6. Place hold-down strap over leg block and secure strap to slide-out assembly with supplied screws (Fig. 4).

7. Reinstall pin in leg block.

8. At job site remove hold-down strap and make utility connections at rear utility panel.

position track accessory so that 2" (51mm) duct
supplied with air-cooled satellite-fill icemaker mates
with back of counter opening.

counter front

grille supplied with air-

cooled satellite-fill icemakes

bin signal cord

(icemaker connection)

(air-cooled units only)

Fig. 3

Fig. 4

air in

hold-down strap
(for installation; remove
and discard)

power cord

bin signal cord

Remove screw. Install
supplied screws and spacers.

11

supplied screws (for installation;
remove and discard)

Front view

3/8" OD push-in condenser inlet

(water-cooled only)

5.25"

(134mm)

Side view

(All customer field
connections are made
to rear of vertical
utility panel)

3/8" OD push-in condenser drain

(water-cooled only)

3/8" OD push-in icemaker water inlet

barbed push-on icemaker drain

3/8" OD push-in condenser inlet

(water-cooled only)

3/8" OD push-in condenser drain

(water-cooled only)

3/8" OD push-in icemaker water inlet

icemaker power cord

bin signal cord connector

(to connect to dispenser bin signal cord)

3/4" MPT icemaker drain

icemaker
power outlet

icemaker
twist-lock
bin signal cord

25.875"

(658mm)

cord holder

vertical utility panel

16.75"

(415mm)

Plan view

22.75"

(578mm)

(40mm)

1.563"

22.75"

(578mm)

Icemaker front

16"

(407mm)

19.25"

(489mm)

25.875"

(658mm)

1.563"

(40mm)

12

Satellite-fill icemaker ventilation and exhaust requirements

Fabricator-supplied, custom air intake grilles must have 12" x 12" (305mm x 305mm) opening yielding 100 sq.
inches (645 sq. cm) of open air space within duct perimeter. Block off any open area outside of the air duct.

Intake air requirements — air-cooled icemakers (MCD400AHS, MCD400AVS & R400A only)

1. Check that 2" (51mm) duct is installed on condenser front.

2. Cut a 12" x 12" (305mm x 305mm) opening in counter face to align with duct.

3. Position icemaker to mate duct flush with back of counter opening.

4. Install supplied grille on outside of counter opening.

Exhaust air — all icemakers (MCD400A/W & R400A/W)

Provide 100 sq. in. (645 sq. cm) of counter opening for exhaust air at least 18" (457mm) from intake opening
but not more than 10 ft (3m) away.

MCD400AHS, MCD400AVS & R400A — Side View

Standard
louvered grille
(supplied)

Air intake

Standard 51mm
(2") duct
mates counter
opening
(behind grille) to
condenser front

Exhaust air

Supplied 2" (51mm) duct MUST be installed
to front of icemaker and mated flush to inside
of counter face opening.

Front View

Exhaust air
out side to
opening at least
457mm (18" )
from air intake

Air in
through louver

Air out through louver

Provide at least 645 sq. cm
(100 sq. inches) of counter
opening for exhaust air

13

Satellite-fill icemaker ice transport tube installation

Incorrect ice transport tube installation can result in wet ice and dispensing problems. Follow guidelines below
to ensure correct installation. Call factory for assistance if you are unable to meet these requirements.

General requirements

Maximum length of tube run – 20 ft (6m). Factory approval required for longer runs.

Run tube without dips.

One continuous length of tube; no splices.

Minimum radius of bends in tube – 6" (153mm) inside radius.

Maximum number of bends – 6.

Insulation on entire run of ice tube.

Procedure

1. If installing MCD series icemaker refer to additional connection specifications for Vision series ice and
beverage dispensers instructions below.

2. Select side, rear or top knockout in icemaker cabinet for tube entrance.

3. Install supplied grommet in knockout.

4. Remove icemaker top panel.

5. Install supplied insulation on entire length of tube.

6. Run insulated tube without dips between icemaker and dispenser and secure in place.

7. Cut insulation off tube where tube enters grommet.

8. Slide end of tube without insulation through grommet and run to evaporator port.

9. Cut tube to that length.

10. Install a section of insulation on tube from grommet to evaporator port.

11. Slip supplied hose clamp over free end of tube.

12. Pull insulation back from free end of tube.

13. Push tube on evaporator port.

14. Position clamp behind lip on evaporator port and tighten clamp.

Correct installation

• Length of run no more than 20 ft (6m)

• Tube run continuously from icemaker to
dispenser

• Insulation on entire run of tube

• No dips or tight bends

• Tube secured in place

• No splices

Incorrect installation

• Dips in tube where water can collect

• Splice or tight bend that restricts ice flow

• Uninsulated tube that results in wet ice and
potential dispensing problems

14

Additional ice transport tube connection specifications for Vision series ice and beverage dispensers

Check to make sure bin signal on icemaker control board is switched to 24 volt connection.

1. Push one end of ice transport tube(s) through hole(s) provided in side of dispenser.

2. Route tube into ice tube bracket inside dispenser and engage bracket tabs in holes located in end of ice
transport tube(s) (see drawings below).

3. Verify bin thermostat capillary tube is mounted correctly (see drawings below).

Ice tube retainer bracket

1" (25mm)

ice tube
retaining
bracket

ice tube

Bin thermostat capillary tube mounting

Front View, VU155 Front View, VU300

ice tube
retaining
bracket

thermostat thermostat

tabs in ice tube

ice tube

retainer bracket
engage holes in ice
tube and hold tube
in place

ice tube
retaining
bracket

ice tube

ice tube

thermostat

15

Ice transport tube installation detail

install insulation on full run of tube

Dispenser

Evaporator

install clamp behind lip on
evaporator port

grommet

Satellite-fill icemaker start up procedure

The start-up procedure below is intended to ensure that icemaker is operating properly after installation has been
made. Check each item listed and call factory immediately for assistance if you experience problems with unit.

Before turning on power

1. Turn on water to icemaker.

2. Push down on float to force water through overflow chamber into evaporator drain pan and check for proper
drainage of drain pan.

3. Check that float valve shuts off incoming water when raised.

4. Check that hose clamp securely holds ice transport tube on evaporator port.

After turning on power

1. Turn on power to icemaker and confirm that gearmotor, fan motor and compressor start immediately.

2. Check that ice begins to enter dispenser bin area within approximately 10 minutes.

3. Check that float reservoir water level is approximately 3/8" (.95mm) below overflow during icemaker
operation and adjust to this level if necessary.

4. Put ice against bin level thermostat in dispenser bin and check that compressor and fan motor shut down
approximately 10 seconds after thermostat opens. Gearmotor should run for an additional 60 seconds.

5. Check that icemaker comes back on in approximately 20 minutes (bin signal must be present).

Operation

Cleaning and preventive maintenance (all models)

Preventive maintenance

Periodic cleaning of Follett’s icemaker system is required to ensure peak performance and delivery of clean,
sanitary ice. The recommended cleaning procedures that follow should be performed at least as frequently as
recommended and more often if environmental conditions dictate.

Cleaning of the condenser can usually be performed by facility personnel. Cleaning of the icemaker system,
in most cases, should be performed by your facility’s maintenance staff or a Follett authorized service agent.
Regardless of who performs the cleaning, it is the operator’s responsibility to see that this cleaning is performed
according to the schedule below. Service problems resulting from lack of preventive maintenance will not be

covered under the Follett warranty.

Weekly exterior care

The exterior may be cleaned with a stainless cleaner such as 3M Stainless Steel Cleaner & Polish or equivalent.

16

Monthly condenser cleaning (air-cooled icemaker only)

1. Use a vacuum cleaner or stiff brush to carefully clean condenser coils of air-cooled icemakers to ensure
optimal performance.

2. When reinstalling counter panels in front of remote icemakers, be sure that ventilation louvers line up with
condenser air duct.

Semi-annual evaporator cleaning (every 6 months)

Solution A – Ice machine cleaner: Prepare one gallon (3.8L) of Follett

SafeCLEAN™ Ice Machine Cleaner (one 7 oz packet) or equivalent. Solution
temperature must be at least 120° F (49°C).

Warning: Most ice machine cleaners contain citric or phosphoric acid that
can cause skin irritation. Read caution label on product and follow instructions
carefully.

Solution B – Sanitizing solution: Prepare 2 gallons (9L)

Combine 1 oz (30ml) bleach with 2 gal (8L) hot water (at least 120°F (49°C))
or use 200ppm of Ecolab Mikro-chlor Cleaner or equivalent 5.25% sodium
hypochlorite solution.

1. Remove icemaker panels required to gain access to water reservoir'
components (Fig. 5) and electrical control box.

2. Turn compressor switch on electrical box to OFF position.

3. Dispense all ice from dispenser.

4. Shut off water to icemaker.

5. Drain water from reservoir through float/evaporator drain line (Fig. 5.1).
Reinsert hose into hose clip (Fig. 5.3).

6. Fill reservoir and evaporator (Fig. 5.2) with Solution A.

7. Verify compressor switch is in the off position. Restart icemaker and
allow gearmotor to run for 15 minutes.

8. While waiting 15 minutes, follow steps 8a through 8c.

a) Remove ice compression nozzle (Fig. 6.1). Soak in Solution A.
Note: No compression nozzle on MFD400 series flake icemaker.
b) Descale drain pans (Fig. 6.2) by grasping firmly and gently bending

up and down. Vacuum residue out.

c) Inspect all drain lines. Clean as necessary with Solution A (Fig. 5).

9. Disconnect icemaker power.

10. Drain Solution A through float/evaporator drain line (Fig. 5.3). Rinse
evaporator by filling reservoir (Fig. 5.2) with potable water and draining
evaporator through float/evaporator drain line (Fig. 5.3) three times.
Reinsert hose into hose clip (Fig. 5.3) and insert plug into end of drain
line (Fig. 5.1).

11. Connect ice transport tubes (Fig. 6.3) directly to evaporator outlet ports
(without ice compression nozzle) (Fig 6.4).

12. Fill reservoir and evaporator (Fig. 5.2) with Solution B.

13. Rinse ice compression nozzle in clear water and submerge in cup of Solution B while performing steps 14
through 16.

14. Turn on bin signal switch in electrical box to allow gearmotor to run.

15. Wait 10 minutes. Turn compressor switch on.

16. Keep reservoir (Fig. 5.2) full of Solution B while making ice for 20 minutes.

17. Turn compressor switch off.

18. Rinse ice compression nozzles (Fig. 6.1) with water and reinstall.

Note: No compression nozzles on MFD400 series flake icemaker.

19. Drain any remaining sanitizing solution from reservoir through float/evaporator drain line (Fig. 5.1).

20. Fill reservoir (Fig. 5.2) with 120˚F (49˚C) water. Empty water through float/evaporator drain line (Fig 5.3).
Repeat 3 times.

21. Turn on water to icemaker.

22. Turn compressor switch on.

23. Replace reservoir cover and any panels removed to clean icemaker.

24. Make ice for 30 minutes. Dispense and discard all ice.

25. Clean and sanitize dispenser as outlined in dispenser operation and service manual.

17

Fig. 5

2

1

3

Fig. 6

1

3

4

2

Service

Icemaker Operation (all models)

Follett’s icemaker consists of four distinct functional systems:

• Refrigeration system

• Water system

• Harvesting system

• Electrical control system

These four systems work together to accomplish the production and harvesting of ice. A problem in any one
of these systems will result in improper operation of the entire ice production cycle. When troubleshooting the
icemaker, it is important to analyze the entire system operation to determine which system is not functioning
properly, then pinpoint the component within that system that is malfunctioning. Determine what corrective action
must be taken before making any adjustments or replacing any components.

The icemaking process

The Follett icemaker uses a stainless steel jacketed evaporator and operates on a continuous freezing cycle. Water is
supplied to the evaporator from the water reservoir where the water level is controlled by a float valve. This valve also
shuts off the water supply when the icemaker is not running.

When the icemaker is running, a
layer of ice forms on the interior
surface of the evaporator. This ice
is continuously removed by a slowly
rotating (12 RPM) auger. The auger
carries the ice upward into the
cavity formed by the top bearing
housing and the compression
loop, where it is compressed to
remove excess water. When the
ice reaches the desired hardness
it rotates within the cavity and is
forced through a discharge port and
compression nozzle and into the ice
transport tube. The discharge tube
and compression nozzle are slightly
restricted to further compress
the ice and produce the desired
hardness. Note: MFD series flake
icemakers have no compression
nozzle. As the formation of ice
continues, ice in the transport tube
is pushed through the tube to the
storage compartment in the ice
dispenser or ice storage bin.

Harvest system diagram

evaporator
port

ice transport tube

compression nozzle

auger

water
inlet

A solid state control board located
in the electrical box of the icemaker
controls the normal operation of the
icemaker and monitors gearmotor
torque. This control board will shut
down the icemaker should an
over-torque condition occur. It is
very important that you familiarize
yourself with the operational
sequences detailed in this manual
before attempting to service
the icemaker.

18

Technical specifications (all models)

Refrigeration system diagram

high side

service port

condenser

high pressure

switch

filter dryer

compressor

low

pressure

liquid

thermostatic

expansion

valve

evaporator

high

pressure

vapor

high

pressure

liquid

Refrigeration pressure data

Notes: 1) Water regulating valve is factory set at 225 PSIG head pressure.

2) Readings within 10% of above table values should be considered normal.

low side

service port

low

pressure

vapor

Air-cooled Icemaker
Refrigeration Pressure

Discharge Pressure/Suction Pressure

Ambient air temperature ˚F/˚C

˚F/˚C

50/10

70/21

90/32

Icemaker inlet water temperature ˚F/˚C

60/16

174/23

174/23

190/25

80/27

245/31

244/30

265/32

100/38

237/37

326/38

347/40

psi

psi

psi

Water-cooled Icemaker
Refrigeration Pressure

Discharge Pressure/Suction Pressure

Condenser inlet water temperature ˚F/˚C

˚F/˚C

50/10

70/21

90/32

Icemaker inlet water temperature ˚F/˚C

50/10

236/28

237/28

236/28

70/21

235/29

230/30

235/30

90/32

250/34

250/34

250/34

Compressor data

Compressor current draw

Air-cooled

Ambient air temp. 60˚F/15.6˚C 70˚F/21.1˚C 80˚F/26.7˚C 90˚F/32.2˚C 100˚F/37.8˚C

6.3A 6.5A 6.7A 6.9A 7.1A

Water-cooled

Water temp. at float 50˚F/10˚C 60˚F/15.6˚C 70˚F/21.1˚C 80˚F/26.7˚C 90˚F/32.2˚C

6.6A 6.7A 6.7A 6.8A 6.9A

Locked rotor amps 58.8

psi

psi

psi

19

Air-cooled icemaker capacity/24 hrs.

X

Ambient Air Temperature ˚F/˚C

60

70

80

90

32
335
152
329
150
323
147
297
135
270
123

100

38
273
124
270
123
266
121
247
112
227
103

lbs.
kg.
lbs.
kg.
lbs.
kg.
lbs.
kg.
lbs.
kg.

Inlet Water Temperature ˚F/˚C

F

C
50
10
60
16
70
21
80
27
90
32

16
510
232
482
219
454
206
424
193
394
179

21
454
206
435
198
417
190
385
175
354
161

27
397
180
389
177
380
173
347
158
313
142

Note: Nominal values – actual production may vary by ± 10%

Gearmotor data

Gearmotor current 2.25A (nominal)

Water-cooled icemaker capacity/24 hrs.

Performance with new RG Group 1/2 ton coil
(Note: Data expressed in lbs/hr and kg/hr)

Ambient Air Temperature ˚F/˚C

60

70

80

90

32
437
199
399
181
371
168
342
155
323
146

100

38
428
194
394
179
361
163
333
151
309
140

Inlet Water Temperature ˚F/˚C

F

C
50
10
60
16
70
21
80
27
90
32

16
451
204
423
192
394
179
371
168
352
160

21
447
202
413
187
390
177
361
163
342
155

27
442
200
409
185
380
172
352
160
333
151

lbs.
kg.
lbs.
kg.
lbs.
kg.
lbs.
kg.
lbs.
kg.

Electrical control system operation

MCD400A/WBT, MCD400A/WHT and MFD400A/WBT wiring diagram

Follett icemakers used on top of an ice storage bin have a slightly different circuitry. A diagram for these
icemakers is shown below. The operational and diagnostic stages for these icemakers will be otherwise the same
as the following stages 1 - 10.

INPUT

WHITE

T.O.L.

WHITE

POWER

W

B

COMPRESSOR

R

C

S

RED

BLACK

2

4

3

FAN

M

BLACK

ORANGE

BLACK

BLACK

YELLOW

BLACK

M

S

HIGH PRESSURE
SAFETY SWITCH

GEARMOTOR

START

RUN

L

1

G

BLACK

BLACK

BLACK

GRD

WHITE

WHITE

RED

T.O.L.

GRD

L1

L1
L2

CONTROL

L2
L2

BOARD

L2

L2

COMPRESSOR
FAN
DRIVE

BLACK

BLUE

LINE VAC

COMMON

24V

RESET

WATER
SENSOR

PWR

DR

C

20M

60M

2ND

WTR

B-T

B-E

WHITE

BLACK

RED
RED

COMPRESSOR
SWITCH

WHITE

RED

BIN T-STAT

BIN SIGNAL
FROM DISPENSER
JUNCTION BOX

20

Electrical control system operation

X

The D400A/W, MCD400A/WVS and R400A/W wiring diagrams which follow illustrate the circuitry of Follett
icemakers used with ice dispensers. Both normal operation of the icemaker (Stages 1 - 6) and non-normal
diagnostic sequences showing torque-out (Stages 7 - 10) for use in troubleshooting icemaker problems are
shown.

Follett icemakers used on top of an ice storage bin have a slightly different circuitry. The operational and
diagnostic stages for these icemakers will be otherwise the same as Stages 1 - 10 that follow.

Circuitry notes

When the icemaker is used with a dispenser it receives power from two sources – the main power supply and the
bin control signal power from the dispenser. Disconnect both power sources before performing service. When
performing electrical service, always use a meter to determine whether or not the components being serviced are
energized.

High pressure cutout opens at 425 PSI and closes at 287 PSI (auto reset).

Compressor switch should read open in on position.

Compressor start relay is position sensitive. See label on start relay for proper orientation.

Bin signal may be 120V, 60Hz; 230V, 50Hz; or 24V, 60Hz. If bin signal is 24V, 60Hz, black bin signal wire must be
moved from LINE VAC terminal to 24V terminal.

Flashing water LED at any time indicates that water signal to board had been lost for more than
one second.

Ten-second delay: There is a 10 second delay in reaction to loss of water (WTR) or bin (B-E) signals. If signals
are not lost for more than 10 seconds, no reaction will occur.

Normal operation – Stage 1

Power is supplied to L1 of the control board. The ice level control in the dispenser is closed and calling for ice,
supplying signal voltage to the control board. The control board will now go through the start-up sequence. Less
than 30 seconds will elapse as the water sensor located in the float reservoir checks for water in the reservoir.
The Bin Empty LED (B-E) will be on.

INPUT

POWER

G

B

W

WHITE

COMPRESSOR

C

T.O.L.

RED

WHITE

GRD

BLACK

R

S

FAN

BLACK

YELLOW

BLACK

1

M

L

S

GEARMOTOR

START

RUN

BLACK

BLACK

BLACK

M

BLACK

ORANGE

BLACK

HIGH PRESSURE
SAFETY SWITCH

2

4

3

WATE R

SENSOR

WHITE

WHITE

RED

T. O. L .

GRD

L1
L1
L2

CONTROL

L2
L2

BOARD

L2
L2

COMPRESSOR
FAN
DRIVE

B
LACK

B
LUE

BIN SIGNAL
FROM DISPENSER
JUNCTION BOX
(MCD400A/WVS series –
blk wire is on 24V)

LINE VAC

PWR

RESET

DR

C

20M

60M

2
4V

WHITE

2ND

WTR

B-T

B-E

COMPRESSOR

SWITCH

WHITE

RED

BIN T- STAT

RED

RED

COMMON

BLACK

21

X

Normal operation – Stage 2

X

The water sensor verifies water in the float. The Water OK LED (WTR) comes on. At the same time, the
gearmotor, compressor, and condenser fan motor come on, lighting the Drive LED (DR) and compressor LED
(C). The compressor is started through a current style relay that is pulled in by the initial high current draw of the
compressor. The gearmotor start windings are also energized through a current relay. The B-E and WTR LED
remain on.

INPUT

POWER

G

B

W

WHITE

COMPRESSOR

C

T.O.L.

RED

WHITE

GRD

BLACK

R

S

FAN

BLACK

YELLOW

BLACK

1

M

L

S

GEARMOTOR

START

RUN

BLACK

BLACK

BLACK

M

BLACK

ORANGE

BLACK

HIGH PRESSURE
SAFETY SWITCH

2

4

3

WATE R

SENSOR

WHITE

WHITE

RED

T. O. L .

GRD

L1
L1
L2

CONTROL

L2
L2

BOARD

L2
L2

COMPRESSOR
FAN
DRIVE

B
LACK

B
LUE

BIN SIGNAL
FROM DISPENSER
JUNCTION BOX
(MCD400A/WVS series –
blk wire is on 24V)

LINE VAC

PWR

RESET

DR

C

20M

60M

2
4V

WHITE

2ND

WTR

B-T

B-E

COMPRESSOR

SWITCH

WHITE

RED

BIN T- STAT

RED

RED

COMMON

BLACK

Normal operation – Stage 3

After the initial high current draw drops off, the gearmotor start relay contacts open dropping out the start winding.
As the compressor comes up to normal running speed, the compressor start relay contacts open, dropping out
the start winding of the compressor. The icemaker is now in a normal icemaking mode. The icemaker will produce
ice until the bin level control in the ice dispenser is satisfied. The B-E, DR, C and WTR LEDs are all on.

INPUT

POWER

G

B

W

WHITE

COMPRESSOR

C

T.O.L.

RED

WHITE

GRD

BLACK

R

S

FAN

BLACK

YELLOW

BLACK

1

M

L

S

GEARMOTOR

START

BLACK

BLACK

BLACK

RUN

M

BLACK

ORANGE

BLACK

HIGH PRESSURE
SAFETY SWITCH

2

4

3

WATE R

SENSOR

WHITE

WHITE

RED

T. O. L .

GRD

L1
L1
L2

CONTROL

L2
L2

BOARD

L2
L2

COMPRESSOR
FAN
DRIVE

B
LACK

B
LUE

BIN SIGNAL
FROM DISPENSER
JUNCTION BOX
(MCD400A/WVS series –
blk wire is on 24V)

LINE VAC

PWR

RESET

DR

C

20M

60M

2
4V

WHITE

2ND

WTR

B-T

B-E

COMPRESSOR

SWITCH

WHITE

RED

BIN T- STAT

RED

RED

COMMON

BLACK

22

Normal operation – Stage 4

X

X

Once the ice level control opens, the B-E LED goes out. After a 10 second delay the LED (C), compressor, and
fan motor go off and the B-T LED comes on. (Should the ice level control not remain open for 10 seconds, the
icemaker will continue to run.) The gearmotor continues to run for 60 seconds. The purpose of this function is to
drive the remaining ice out of the evaporator and to boil off any refrigerant remaining in the evaporator.

INPUT

POWER

G

B

W

WHITE

COMPRESSOR

C

T.O.L.

RED

WHITE

GRD

BLACK

R

S

FAN

BLACK

YELLOW

BLACK

1

M

L

S

GEARMOTOR

START

RUN

BLACK

BLACK

BLACK

M

BLACK

ORANGE

BLACK

HIGH PRESSURE
SAFETY SWITCH

2

4

3

WATER

SENSOR

WHITE

WHITE

RED

T. O. L .

GRD

L1
L1
L2

CONTROL

L2
L2

BOARD

L2
L2

COMPRESSOR
FAN
DRIVE

BLACK

BLUE

PWR

RESET

DR

C

20M

60M

24V

WHITE

2ND

WTR

B-T

B-E

COMPRESSOR

WHITE

RED

COMMON

L
INE VAC

BLACK

BIN SIGNAL
FROM DISPENSER
JUNCTION BOX
(MCD400A/WVS series –
blk wire is on 24V)

RED

RED

SWITCH

BIN T-S TAT

Normal operation – Stage 5

The B-T LED will remain on for 20 minutes. The icemaker will not start while the B-T LED is on. To restart the
icemaker for troubleshooting purposes, depress the reset button to clear the control board.

INPUT

POWER

G

B

W

WHITE

COMPRESSOR

C

T.O.L.

RED

WHITE

GRD

BLACK

R

S

FAN

BLACK

BLACK

1

M

L

S

GEARMOTOR

START

RUN

BLACK

BLACK

BLACK

M

BLACK

ORANGE

BLACK

HIGH PRESSURE
SAFETY SWITCH

2

4

YELLOW

3

WATE R

SENSOR

WHITE

WHITE

RED

T. O. L .

GRD

L1
L1
L2

CONTROL

L2
L2

BOARD

L2
L2

COMPRESSOR
FAN
DRIVE

BLA

CK

BLUE

PWR

RESET

DR

C

20M

60M

2
4V

WHITE

2ND

WTR

B-T

B-E

COMPRESSOR

WHITE

RED

COMMON

LINE VAC

BLACK

BIN SIGNAL
FROM DISPENSER
JUNCTION BOX
(MCD400A/WVS series –
blk wire is on 24V)

RED

RED

SWITCH

BIN T- STAT

23

Normal operation – Stage 6

X

X

When the dwell time of 20 minutes has expired, the B-T LED goes off. The icemaker will go through the normal
start-up sequence when the bin level control signals the control board for ice. The WTR LED will remain on as
long as the water sensor in the float reservoir senses water.

INPUT

POWER

G

B

W

WHITE

COMPRESSOR

C

T.O.L.

RED

WHITE

GRD

BLACK

R

S

FAN

BLACK

YELLOW

BLACK

1

M

L

S

GEARMOTOR

START

BLACK

BLACK

BLACK

RUN

M

BLACK

ORANGE

BLACK

HIGH PRESSURE
SAFETY SWITCH

2

4

3

WATE R

SENSOR

WHITE

WHITE

RED

T. O. L .

GRD

L1
L1
L2

CONTROL

L2
L2

BOARD

L2
L2

COMPRESSOR
FAN
DRIVE

B
LACK

B
LUE

PWR

RESET

DR

C

20M

60M

2
4V

WHITE

2ND

WTR

B-T

B-E

COMPRESSOR

WHITE

RED

COMMON

LINE VAC

BLACK

BIN SIGNAL
FROM DISPENSER
JUNCTION BOX
(MCD400A/WVS series –
blk wire is on 24V)

RED

RED

SWITCH

BIN T- STAT

Diagnostic sequence – Stage 7

The 20 minute error LED (20M) is on indicating that the control board has sensed an over-torque condition
(above 3 AMPS on the gearmotor) and shut the icemaker down. The 20M LED will remain on for 20 minutes after
an over-torque condition has occurred. The icemaker will remain off as long as the 20M LED is on. When the 20M
LED goes off, the control board will try to go through a normal start-up sequence. The WTR LED remains on as
long as the water sensor in the float reservoir senses water.

INPUT

POWER

G

B

W

WHITE

COMPRESSOR

C

T.O.L.

RED

WHITE

GRD

BLACK

R

S

FAN

BLACK

BLACK

1

M

L

S

GEARMOTOR

START

RUN

BLACK

BLACK

BLACK

M

BLACK

ORANGE

BLACK

HIGH PRESSURE
SAFETY SWITCH

2

4

YELLOW

3

WATE R

SENSOR

WHITE

WHITE

RED

T. O. L .

GRD

L1
L1
L2

CONTROL

L2
L2

BOARD

L2
L2

COMPRESSOR
FAN
DRIVE

B
LACK

B
LUE

BIN SIGNAL
FROM DISPENSER
JUNCTION BOX
(MCD400A/WVS series –
blk wire is on 24V)

LINE VAC

PWR

RESET

DR

C

20M

60M

2
4V

WHITE

2ND

WTR

B-T

B-E

COMPRESSOR

SWITCH

WHITE

RED

BIN T- STAT

RED

RED

COMMON

BLACK

24

Diagnostic sequence – Stage 8

X

X

If the restart is successful the 20M LED goes off, the 60 minute timer LED (60M) comes on. The 60M LED will
remain on for 60 minutes from restart. A lighted 60M LED tells the technician that the icemaker has experienced
an over-torque condition. If the icemaker runs without problems for 60 minutes and no additional torque errors
occur, the 60M LED will go off and the icemaker will continue normal operation.

INPUT

POWER

G

B

W

WHITE

COMPRESSOR

C

T.O.L.

RED

WHITE

GRD

BLACK

R

S

FAN

BLACK

BLACK

1

M

L

S

GEARMOTOR

START

RUN

BLACK

BLACK

BLACK

M

BLACK

ORANGE

BLACK

HIGH PRESSURE
SAFETY SWITCH

2

4

YELLOW

3

WATE R

SENSOR

WHITE

WHITE

RED

T. O. L .

GRD

L1
L1
L2

CONTROL

L2
L2

BOARD

L2
L2

COMPRESSOR
FAN
DRIVE

BLA

CK

BLUE

PWR

RESET

DR

C

20M

60M

2
4V

WHITE

2ND

WTR

B-T

B-E

COMPRESSOR

WHITE

RED

COMMON

LINE VAC

BLACK

BIN SIGNAL
FROM DISPENSER
JUNCTION BOX
(MCD400A/WVS series –
blk wire is on 24V)

RED

RED

SWITCH

BIN T- STAT

Diagnostic sequence – Stage 9

The second error (2ND) LED will come on if an over-torque condition occurs while the 60M LED is still lighted.
The 2ND LED will indicate to the technician that two consecutive over-torque situations have occurred. The
icemaker will shut down at this time and lock out. It will not restart unless the manual reset button is depressed.

INPUT

POWER

G

B

W

WHITE

COMPRESSOR

C

T.O.L.

RED

WHITE

GRD

BLACK

S

FAN

BLACK

YELLOW

BLACK

1

M

L

S

GEARMOTOR

START

BLACK

BLACK

BLACK

RUN

M

R

4

ORANGE

BLACK

HIGH PRESSURE
SAFETY SWITCH

2

3

BLACK

WATE R

SENSOR

WHITE

WHITE

RED

T. O. L .

GRD

L1
L1
L2

CONTROL

L2
L2

BOARD

L2
L2

COMPRESSOR
FAN
DRIVE

B
LACK

B
LUE

PWR

RESET

DR

C

20M

60M

2
4V

WHITE

2ND

WTR

B-T

B-E

COMPRESSOR

WHITE

RED

COMMON

LINE VAC

BLACK

BIN SIGNAL
FROM DISPENSER
JUNCTION BOX
(MCD400A/WVS series –
blk wire is on 24V)

RED

RED

SWITCH

BIN T- STAT

25

Diagnostic sequence – Stage 10

X

If the water level in the float reservoir drops to an unacceptable level, the WTR LED will go out, shutting the
icemaker off. Also, the BT LED will come on, preventing the icemaker from restarting for twenty minutes. If water
is restored, the WTR LED will come back on and flash to alert the technician that water to icemaker has been
lost. The icemaker will then restart at the end of the 20 minute time delay. The flashing WTR LED can be cleared
by pressing the reset button.

INPUT

POWER

G

B

W

WHITE

COMPRESSOR

C

T.O.L.

RED

WHITE

GRD

BLACK

R

S

FAN

BLACK

YELLOW

BLACK

1

M

L

S

GEARMOTOR

START

BLACK

BLACK

BLACK

RUN

M

BLACK

ORANGE

BLACK

HIGH PRESSURE
SAFETY SWITCH

2

4

3

WATE R

SENSOR

WHITE

WHITE

RED

T. O. L .

GRD

L1
L1
L2

CONTROL

L2
L2

BOARD

L2
L2

COMPRESSOR
FAN
DRIVE

B
LACK

B
LUE

PWR

RESET

DR

C

20M

60M

2
4V

WHITE

2ND

WTR

B-T

B-E

COMPRESSOR

WHITE

RED

COMMON

LINE VAC

BLACK

BIN SIGNAL
FROM DISPENSER
JUNCTION BOX
(MCD400A/WVS series –
blk wire is on 24V)

RED

RED

SWITCH

BIN T- STAT

26

Refrigeration system (all models)

All service on refrigeration systems must be performed in accordance with all federal, state and local laws. It is
the responsibility of the technician to ensure that these requirements are met. Recharging icemaker to other than
factory specifications will void the warranty.

R404A icemaker charge specifications

Model Charge Refrigerant type

T400A, MCD400A, MFD400A, R400A, D400A (air-cooled) 19oz (539g) R404A

T400W, MCD400W, MFD400W, R400W , D400W (water-cooled) 7oz (200g) R404A

Refrigerant replacement requirements

1. Non-contaminated refrigerant removed from any Follett refrigeration system can be recycled and returned to

the same system after completing repairs. Recycled refrigerant must be stored in a clean, approved storage
container. If additional refrigerant is required, virgin or reclaimed refrigerant that meets ARI standard 700-88
must be used.

2. In the event of system contamination (for example, a compressor burn out, refrigerant leak, presence of non­condensibles or moisture), the system must be repaired, evacuated and recharged using virgin or reclaimed
refrigerant that meets ARI standard 700-88.

3. Follett Corporation does not approve of recovered refrigerants. Improper refrigeration servicing procedures
will void the factory warranty.

Evacuation

Evacuate the system to a level of 500 microns. When the 500 micron level is reached, close valves and both
manifold and shut down the vacuum pump. Allow the system to sit for approximately 20 minutes. During this
period the system pressure should not rise. If the system pressure rises and stabilizes there is moisture in the
system and further evacuation is needed. If the pressure continues to rise check the system for leaks.

Ambients Minimum Maximum

Air temperature1 50˚F/10˚C 100˚F/37.8˚C
Water temperature2 40˚F/4.4˚C 90˚F/32.2˚C

1

Ambient air temperature is measured at the air-cooled condenser coil inlet.

2

Ambient water temperature is measured in the icemaker float reservoir.

Ice capacity test

Icemaker production capacity can only be determined by weighing ice produced in a specific time period.

1. Replace all panels on icemaker.

2. Run icemaker for at least 15 minutes.

3. Weigh and record weight of container used to catch ice.

4. Catch ice for 15 or 20 minutes.

5. Weigh harvested ice and record total weight.

6. Subtract weight of container from total weight.

7. Convert fractions of pounds to decimal equivalents (ex. 6 lbs 8oz = 6.5 lbs).

8. Calculate production using following formula:

1440 min. x wt. of ice produced
= Production capacity/24 hr. period
Total test time in minutes

9. Calculated amount per 24 hours should be checked against rated capacity for same ambient and water
temperatures in Ice Production Tables.

27

Service procedures

Evaporator disassembly (Fig. 7)

1. Disconnect power to icemaker.

2. Shut off water to icemaker.

3. Drain evaporator and float tank.

4. Disconnect plastic tubing from evaporator water inlet, drain pan

stub, compression nozzle tubing and reservoir overflow tubing from
secured clip.

5. Disconnect ice transport tube from compression nozzle.

Note: No compression nozzle on MFD400 series flake icemakers.

6. Loosen nut and remove upper vee band coupling from top of

evaporator.

7. Lift top bearing assembly straight up with a slight rotating motion and

remove.

8. Remove ice compression loop located at top of auger.

9. Lift auger straight up and out of evaporator.

10. Remove nut and lower vee band coupling from bottom of evaporator.

11. Lift evaporator to clear bottom bearing assembly.

12. Loosen hex head bolt in side of mounting base with 5/16 wrench and

lift lower bearing assembly.

13. Remove condensate shield.

14. Remove 4 Allen head machine screws holding mounting base to

gearbox.

15. If replacing evaporator, remove compression nozzle from evaporator

port.

Fig. 7

Evaporator reassembly (Fig. 7)

1. Clean gearmotor boss, output shaft and shaft well.

2. Install drain pan and evaporator mounting base.

3. Fill gearmotor shaft well with food-grade grease (Fig. 8).

4. Install condensate shield and seat against gearmotor boss.

5. Install mounting base O ring in groove in evaporator mounting base.

6. Lower bottom bearing assembly into evaporator mounting base.

7. While maintaining a downward pressure on bottom bearing

assembly, tighten hex head bolt with a 5/16 wrench.

8. Position evaporator over lower bearing assembly and align grooves

with pins in bearing assembly.

9. Install vee band clamp and nut and tighten to 70 in/lb.

10. Place auger in center of evaporator and rotate to mate with drive pin.

11. Install ice compression loop, orienting loop as shown in Fig. 7.

Note: No compression nozzle on MFD400 series flake icemakers.

12. Install upper bearing and seal assembly, rotating bearing to slip pin.

into auger slot.

13. Install upper vee band clamp and nut and tighten to 70 in/lb.

14. If evaporator was replaced, reinstall compression nozzle.

Gearmotor replacement (Fig. 8)

1. Disassemble evaporator as described above.

2. Disconnect the wire connectors.

3. Remove 4 screws holding gearmotor mounting plate to base of

icemaker and lift gearbox and motor clear of icemaker (Fig. 8.1).

4. Remove machine screws holding mounting plate to motor (Fig. 8.2).

5. Install new motor in reverse order.

28

Fig. 8

apply
grease
here

1

2

Troubleshooting chart

Flashing water LED at any time indicates that water signal to board had been lost for more than one second.

Ten-second delay: There is a 10 second delay in reaction to loss of water (WTR) or bin (B-E) signals. If signals are not lost
for more than 10 seconds, no reaction will occur.

Problem

1. Icemaker will
not run.

System status:

compressor,
gearmotor, and fan
motor inoperative.

2. Compressor will
not run.

System status:

gearmotor and fan
motor run.

3. Unit cycles
intermittently.

System status:

compressor, gear
motor, and fan
motor cycle.

4. Low ice production.

Poor quality ice.

5. Water leaks
from bottom of
evaporator.

Indicators/possible cause

1. No power to unit.

2. Open bin level control.

3. Water OK LED (WTR) not on.

4. 20M or 2ND LED is on indicating that first
or second torque error has occurred.

5. Gearmotor locked up (immediate torque
error indicated by LEDs when board is
reset).

6. Open coil on gearmotor start relay
causing an immediate torque error.

1. Condenser coil plugged causing open
overload or high pressure cut-out.

2. Defective starting capacitor.

3. Defective starting relay.

4. Open motor winding.

5. No power output from compressor output
terminal on control board.

1. Float reservoir running dry, sensing probe
signalling for system to shut down.

1. Dirty condenser coil.

2. Restricted air flow to condenser coil.

3. Mineral coated evaporator.

4. High ambient water supply and/or air
temperature.

5. Improper exhaust air provisions.

6. Faulty expansion valve.

7. Low refrigerant charge.

8. Superheat incorrect.

9. Inefficient compressor.

1. O ring seal broken.

Corrective action

1. Check that unit is plugged in, circuit
breakers are on.

2. Adjust or replace ice level control.

3. Check reservoir for water, restore
water to unit.

4. See Problem #6.

5. Repair or replace gear motor.

6. Replace gearmotor start relay.

1. Clean condenser coil and replace
overload if necessary.

2. Replace start capacitor.

3. Replace relay.

4. Check winding resistance and
replace compressor if necessary.

5. Check terminal connection and
replace control board if necessary.

1. Check water supply to float and float
operation. PC board will have flashing
WTR LED.

1. Clean condenser.

2. Remove obstruction.

3. Clean evaporator.

4. Precool water and/or install air duct
per Follett installation manual.

5. Provide proper exhaust air provisions
per Follett installation manual.

6. Replace expansion valve.

7. Check for leaks; repair, evacuate, and
weigh in correct charge.

8. Check that TEV sensing bulb is
securely clamped in place and not
damaged; check that insulated bulb
cover is in place. Replace TEV if
necessary.

9. Replace compressor.

1. Replace O ring.

29

Troubleshooting

Problem

6. Icemaker runs
for short period
of time and shuts
down on torque
error.

System status:

20M or 2nd LED
are lit.

7. Evaporator is iced
up on the outside.
No ice production.

System status:

compressor,
gearmotor and fan
motor running.

8. Compressor cycles
intermittently.

System status:

gearmotor and fan
motor run.

9. Unit runs but not
making ice.

System status:

compressor,
gearmotor and fan
motor running.

10. Compressor and
fan motor will not
run. Gearmotor
runs.

Indicators/possible cause

1. Kink in ice transport tube.

2. Bin level control remains in closed
position.

3. Ice transport tube ruptured internally.

4. Worn evaporator bearings.

5. Faulty gearmotor start relay. Icemaker
torques out within 5 seconds of start-up.

6. Torque-out occurs when storage bin fills
to capacity.

1. Gearmotor running but no output rotation.

2. Float reservoir empty.

3. Air bubble in water supply line. Water in
reservoir but not in evaporator.

1. Compressor start relay in wrong position.

2. High pressure cutout open due to high
head pressure.

3. Clogged or dirty condenser coil.

4. Improper ventilation.

5. Defective compressor.

1. Clogged or dirty condenser coil.

2. Compressor not pumping.

3. Low refrigerant charge.

1. Compressor switch in OFF position.

2. No output on compressor and fan motor
terminals on control board.

3. Failed fan motor causes high pressure
cut-out to open.

Corrective action

1. Eliminate kink and check that tube
routing complies with Follett icemaker
installation manual.

2. Adjust or replace control.

3. Replace complete run of ice transport
tube.

4. Inspect bearings for roughness or
binding and replace if necessary.

5. Replace gearmotor start relay.

6. Ensure that ice contacts bin
thermostat before backing ice up in
transport tube. Reference dispenser
manual for proper thermostat and ice
tube mounting.

1. Check for broken gearmotor output
shaft or damaged gearbox.

2. Check for defective water sensor
(water OK (WTR) LED remains on
even when float empty or probe
removed from water).

3. Purge air from line.

1. Position relay with arrow or word “top”
facing up.

2a. Check supply and temperature of

water to w/c condenser.

2b. Check discharge pressure and adjust

water regulator value.

3. Clean condenser coil.

4. Provide inlet and exhaust air
provisions per Follett icemaker
installation manual.

5. Replace compressor.

1. Clean condenser coil.

2. Replace compressor.

3. Check for leaks; repair, evacuate, and
weigh in correct charge.

1. Turn compressor switch on.

2. Replace control board.

3. Replace fan motor.

11. Intermittent noises
from evaporator.

1. Mineral build-up on evaporator surface.

30

1. Clean evaporator with liquid IM
cleaner.

Replacement parts

Evaporator

Order parts online
www.follettice.com

Part # Description Reference #

502735 Coupling, vee band, includes nut 1
502736 Bearing assembly, top 2
502110 Loop, ice compression, beveled (all icemakers

except MFD400 series – see flaker-specific
components below) 3

502737 Auger (all icemakers except MFD400A/W –

see flaker specific components below) 4
502725 Evaporator (includes insulation jacket, 502740) 5
500496 O ring, bearing housing 6
502738 Bearing assembly, bottom
(includes O rings and condensate shield) 7
501063 O ring, mounting base 8
500744 Shield, condensate 9
501080 Screw, Allen 1/4 20 x 1/2 (set of 4) 10
502733 Mounting base, evap. (includes 501063) 11
502227 Bolt, mounting base 12
502730 Gearbox & motor assembly 13
502729 Mounting base, gearbox Not shown
502220 Compression nozzle, with double drain
(no nozzle in MFD400 series) 14
502221 Compression nozzle, with single drain
(no nozzle in MFD400 series) 15
502727 Drain pan, evaporator 16
502226 Clamp, compression nozzle and screw 17
500680 Tubing, compression nozzle drain(s)
(sold by foot) 18
501111 Grease, Chevron SRI-2, 14oz Not shown
502739 Bracket, drain hose 19
502740 Insulation jacket, evaporator 20
502742 Relay, start, gearmotor 21
502744 Drip cover, gearmotor 22
502743 Evaporator & gearmotor assembly Not shown
502775 Oil, gearmotor (1 pint) Not shown

15

14

18

21

19

18

22

2

1

1

7

8

10

11

12

3

4

20

16

17

5

6

9

13

Flaker-specific components

Part # Description Reference #

00124123 Auger (with paddle) 3
00124115 Loop, compression, notched 4

31

Air-cooled icemakers

9

Order parts online
www.follettice.com

7

6

8

1

16

13

11

10

14

2

15

17

3

4

12

5

32

Air-cooled icemakers

Part # Description Reference #

502724 Drier 1
501187 Condenser coil, A/C 2
502116 Water sensor Not shown
501986 Reservoir mounting bracket 3
500504 Float valve & reservoir 4
00141440 Drain kit, evaporator 5
Evaporator (see page 35 for complete breakdown) 6
502079 Tubing, polypropylene, reservoir supply (sold by foot) Not shown
502078 Fitting, plastic, float valve (includes sleeve & stem) Not shown
502220 Compression nozzle, with double drain Not shown
502221 Compression nozzle, with single drain Not shown
502726 Valve, expansion, thermal 7
502727 Drain pan, evaporator 8
502732 High pressure cutout 9
501966 Tubing, evaporator drain, 3/4" (19mm) ID x 1" (26mm) OD
(sold by the foot) Not shown
502729 Mounting bracket, gearbox 10
502730 Gearbox & motor assembly, 115V, 60Hz 11
501191 Tubing, plastic, food grade, 1/2" (13mm) ID (sold by foot) 12
500474 Fan blade 13
500672 Motor, fan, 115V, 60Hz 14
501188 Bracket, fan motor 15
502782 Overload, compressor, 115V, 60Hz Not shown
502731 Compressor, 115V, 60Hz 16
502728 Base – L400A 17
500376 Strainer, water, threaded connections Not shown
502920 Strainer, push-in connections Not shown
501820 Shroud, condenser coil Not shown
502734 Water inlet & drain assembly, brass Not shown
502924 Water inlet fitting, plastic Not shown
502925 Water inlet elbow, plastic Not shown
00109728 Drain fitting, plastic Not shown
502830 Jacket, insulation, TXV Not shown

Order parts online
www.follettice.com

33

Water-cooled icemakers

Order parts online
www.follettice.com

18

7

16

13

1

12

14

15

5

9

8

10

3

11

4

17

6

2

34

Water-cooled icemakers

Part # Description Reference #

502724 Drier 1
500537 Valve, water regulating (includes 501810) 2
501810 Iso-washer (for water regulating valve) Not shown
502116 Water sensor Not shown
500504 Float valve & reservoir 3
501986 Reservoir mounting bracket 4
502079 Tubing, polypropylene, reservoir supply (sold by foot) Not shown
502078 Fitting, plastic, float valve (includes sleeve & stem) Not shown
502220 Compression nozzle, with double drain Not shown
502221 Compression nozzle, with single drain Not shown
Evaporator (see page 35 for complete breakdown) 5
00141440 Drain kit, evaporator 6
502954 Drain kit, evaporator, water-cooled freestanding units 6
502726 Valve, expansion, thermal 7
502727 Drain pan, evaporator 8
501966 Tubing, evaporator drain, 3/4" (19mm) ID x 1" (26mm) OD (sold by foot) Not shown
502730 Gearbox & motor assembly, 115V, 60Hz 9
502729 Mounting bracket, gearbox 10
501191 Tubing, plastic, food grade, 1/2" (13mm) ID (sold by foot) 11
500672 Motor, fan, 115V, 60Hz 12
501188 Bracket, fan motor 13
500790 Fan blade 14
502782 Overload compressor, 115V, 60Hz Not shown
502731 Compressor, 115V, 60Hz 15
00111898 Coil, condenser 16
502741 Base, L400W 17
500376 Strainer, water, threaded connections Not shown
502920 Strainer, push-in connections Not shown
502734 Water inlet and drain assembly, brass Not shown
502924 Water inlet fitting, plastic Not shown
502925 Water inlet elbow, plastic Not shown
00109728 Drain fitting, plastic Not shown
502348 Assembly, drain, single fitting Not shown
502732 High pressure cutout 18
502830 Jacket, insulation, TXV Not shown

Order parts online
www.follettice.com

35

Electrical components

Order parts online
www.follettice.com

1

2

EARTH

L1
L1

L2
L2
L2
L2
L2
COMP.

FAN
DRIVE

3

POWER

RESET

I.D.

LABEL

SOFTWARE

I.D.

WATER
PROBE

VAC

LINE

COMM.

VAC

24

DR
C
20M

60M
2ND
WTR
B-T

B-E

COMP.

SWITCH

4

5

Part # Description Reference #

502780 Capacitor, start, compressor, 115V, 60Hz 1
501588 Relay start, compressor, 115V, 60Hz 2
502331 Board, control circuit, 115V, 60Hz 3
502116 Water sensor Not shown
502392 Switch, on/off, compressor 4
500514 Bin thermostat (MCD400A/WBT, MCD400A/WHT, MFD400A/WBT
and MFD400A/WHT only) Not shown
501959 Board, stand off control (4 required) 5

36

Order parts online
www.follettice.com

Water filter kits and cartridges

00130229 Follett QC4-FL4S water filter system (includes FL4S primary cartridge and head, coarse

pre-filter and head, pressure gauge, flushing valve; assembled and installed on mounting

bracket)
00130245 Follett FL4S primary replacement cartridge
00130211 Everpure coarse pre-filter cartridge

Ice machine cleaner

00132001 SafeCLEAN environmentally-friendly cleaner, carton of 24 x 7 oz packets

Miscellaneous

501860 Condensate pump
501781 Regulator, water pressure (25 psi)
502775 Oil, gearmotor, 1 pint
501111 Grease, Chevron, SRI-2, 14 oz tube
500377 Clamp, ice tube
501921 Grommet, ice tube
502783 Duct – 2" (51mm)
502781 Gasket, air duct
501425 Grille
501986 Bracket, float mounting
501759 Cord and plug (female), dispenser bin signal (F1105A/W)
501858 Cord and plug (female), dispenser power (all 25, 50, 110 series dispensers)
501786 Cord and plug (female), dispenser bin signal (all 25 and 50 series top mount and
freestanding dispensers)
501702 Control board adapter (R404A to R12)
502051 Cord and twist-lock plug (male), icemaker bin signal
502052 Cord and twist-lock plug (male), icemaker power
502333 Plug, twist-lock, two lead, male
502334 Plug, twist-lock, two lead, female
502235 Plug, twist-lock, three lead, male
502336 Plug, twist-lock, three lead, female
502794 Panel, right hand, louvered, R400A, MCD400A/W
502795 Cover, top, R400A/W, MCD400A/W
502796 Panel, front utility, R400A, MCD400A
502797 Panel, top front, R400A,MCD400A
502798 Panel, left hand & rear, R400A/W, MCD400A/W
502799 Panel, front, R400W, MCD400W
502800 Filler, base, R400A/W, MCD400A/W
502801 Condenser, L400W
502802 Power cord, R400, MCD400
502803 Bin signal cord, R400, MCD400
502874 Grille, condenser, T400A and MCD400AHT
502875 Filter, air, T400A and MCD400AHT

37

Replacement icemaker ordering matrix

Dispenser models Replacement
icemaker model

Dispensers with top mounted icemakers

50CT400A & 50HT400A D400A
50HT400W & 50HT400W D400W
25CT 400A & 25HT400A D400A
25CT400W & 25HT400W D400W
110CT400A D400A
110CT400W D400W

Dispensers with remote icemakers

25CR400A & 25HR400A R400A
25CR400W & 25HR400W R400W
50CR400A & 50HR400A R400A
50CR400W & 50HR400W R400W
110CR400A R400A
110CR400W R400W
All U150/VU155 series with air-cooled icemakers FC400A
All U150/VU155 series with water-cooled icemakers FC400W
All VU300 series with air-cooled icemakers FC400A
All VU300 series with water-cooled icemakers FC400W

Dispenser models Replacement
icemaker model

Order parts online
www.follettice.com

Freestanding dispensers with icemakers in the base

25FB400A D400A
25FB400W D400W
50FB400A D400A
50FB400W D400W
110FB400A D400A
110FB400W D400W

Nugget icemaker on top of bin

MCD400ABT MCD400ABT
MCD400WBT MCD400WBT

Flake icemaker on top of bin

MFD400ABT MFD400ABT
MFD400WBT MFD400WBT

38

39

801 Church Lane • Easton, PA 18040, USA
Toll free [phone] • [phone]
Fax [phone] • www.follettice.com

L

®

208600R13

03/07

U

U

L

®

C