CMA Dishmachines EST User manual

www.cmadishmachines.com
MODELS
EST/EST TALL
SERVICE & PARTS MANUAL
Rev 1.08
CMA DISHMACHINES
12700 KNOTT STREET
GARDEN GROVE, CALIFORNIA 92841
800-854-6417
FAX [phone]

www.cmadishmachines.com
TABLE OF CONTENTS
MODEL EST
1. SPECIFICATIONS.........................................................................................2
1.1 EST................................................................................................................................................. 2
2. GETTING STARTED .....................................................................................3
2.1. INTRODUCTION TO THE EST............................................................................................................ 3
2.2. RECEIVING AND INSTALLATION ...................................................................................................... 4
2.2.1. Electrical ................................................................................................................................ 4
2.2.2. Plumbing................................................................................................................................. 4
2.2.3. Connecting the Scrap Accumulator and Drain....................................................................... 5
3. OPERATION..................................................................................................6
3.1. INITIAL SETUP ................................................................................................................................. 6
3.2. STARTUP PROCEDURES.................................................................................................................... 7
3.3. QUICK SERVICE GUIDE..................................................................................................................... 8
3.4. TROUBLESHOOTING......................................................................................................................... 9
4. ADDENDUM FOR MACHINES INSTALLED IN THE CITYOFCHICAGO................11
5. PARTS MANUAL ........................................................................................12
5.1. INITIAL PARTS KIT (P/N 01100.84)................................................................................................12
5.2. OPTIONAL SANI ALARM .................................................................................................................13
5.3. EXPLODED VIEW DRAWINGS..........................................................................................................14
5.3.1. Cabinet Assembly (EST/EST Tall).........................................................................................14
5.3.2. Control Box Assembly............................................................................................................15
5.3.3. Door Actuator Assembly (EST/EST Tall) ..............................................................................16
5.3.4. Door Actuator Assembly for Corner EST/EST Tall...............................................................17
5.3.5. Pump Assembly......................................................................................................................18
5.3.1. Plumbing System Assembly (Effective August 2012).............................................................19
5.3.2. Plumbing System Assembly....................................................................................................20
5.3.3. Spray System Assembly (EST/EST Tall) ................................................................................21
5.3.4. Power Drain Assembly ..........................................................................................................22
5.3.5. Power Drain Retrofit Kit p/n 00104.95.................................................................................23
5.3.6. Peristaltic Pump Assembly ....................................................................................................24
6. ELECTRICAL DIAGRAM ............................................................................25

MODEL EST SERVICE & PARTS MANUAL Rev. 1.08Page 2
1. Specifications
1.1 EST
WATER CONSUMPTION
PER RACK 1.09 GAL. (4.12 L)
PER HOUR 43.6 GPH. (165LPH)
OPERATING CYCLE
WASH TIME-SEC. 53 53
RINSE TIME-SEC. 30 30
DWELL TIME-SEC. 7 7
TOTAL CYCLE 90 SEC. 90 SEC.
OPERATING CAPACITY
RACKS PER HOUR 40 40
WASH TANK CAPACITY 1.09 GAL. (4.12 L)
PUMP CAPACITY 52 GPM (196.8 LPM)
WATER REQUIREMENTS
REQUIRED MINIMUM TEMP. 120°F (49°C)
RECOMMENDED TEMP. 140°F (60°C)
WATER INLET ½” 1.27 cm
DRAIN CONNECTION 2” 5.1 cm
DIMENSIONS
DEPTH 25 ¾” (65.405 cm)
WIDTH 25 ¾” (65.405 cm)
HEIGHT 55-56” (140-142 cm)
MAX CLEARANCE FOR DISHES 17” (43.18 cm)
STRANDARD RACKS 19 ¾” x 19 ¾” (50 x 50 cm)
ELECTRICAL RATING VOLTS
(60-Hz) AMPS
115 16
WASH PUMP MOTOR 1 HP
SHIPPING WEIGHT
APPROXIMATE 273# (124 kg)
METRIC
USA

Getting Started
MODEL EST SERVICE & PARTS MANUAL Rev. 1.08Page 3
2. Getting Started
2.1. Introduction to the EST
The EST Dishmachine is safe and easy to operate with its “Auto Start/Stop” and it’s economical
to operate—using only 1.25 gallons of water per cycle and less than 1900 watts of power when
running. The EST Dishmachine’s top mounted controls include built-in chemical pumps and a
deliming system that assures proper chemical usage. Its integrated scrap tray prevents food soil
from entering the drain system. The EST can be run at a rate of 37 racks/148 covers per hour
and its heavy-duty stainless steel construction assures long life and years of trouble free
operation.
The EST is available for straight or corner applications.
This manual is structured to provide a complete reference guide to the EST Dishmachine. It is
presented in a manner that all users will be able to comprehend and use as an effective tool in
supporting the operation and maintenance of the dishmachine. The first section explains how the
machine is packaged and what to look for when receiving the machine.
After unpacking the machine, this manual explains how to install and set up the machine for use.
Requirements are given for plumbing, wiring, and space considerations. These attributes of the
machine are always taken into consideration by our well-trained sales representatives prior to the
order being placed. In the manual, guidance is also given for installation to ensure that the
machine will be able to run at optimum conditions.
The Operation section of the manual may be used for instruction and procedures when required.
We make this portion of the manual easy to understand so that all levels of operators may be
able to read and comprehend the operation of the machine. The function of the machine itself is
mostly automatic and takes little training to put into full operation. The Operation section also
includes diagnostic considerations (troubleshooting) for the machine when problems occur.
The remaining sections of the manual—Parts Manual and Electrical Diagram—have the parts
lists with exploded view drawings and the wiring diagram for the machine.
CMA warranties the workmanship of the machine.
We are committed to providing the best machines and customer service in the food industry and
your feedback is welcome.

Getting Started
MODEL EST SERVICE & PARTS MANUAL Rev. 1.08Page 4
2.2. Receiving and Installation
The dishwasher is shipped from the factory in a corrugated box on a wooden pallet. The
installation guidelines give a systematic procedure for setting up the machine.
Start by removing the dishmachine from the box. Remove the packaging, unwrap the machine
and check for the following components:
Scrap Accumulator complete with lid and scrap tray.
Inside the wash tank is a box with one control box key, 4 legs, thermometer, spray
arms, machine manual and a cam timer wrench.
Tube Stiffeners: The tube stiffeners must be used to prevent the feed tubes from
curling up inside the chemical pail allowing the tip to rise out of the chemical.
Remove the tie-wraps securing the tube stiffeners to the dishmachine to free them up
for use. Be careful not to remove any of the tie-wraps securing the tube bundle. Red
is for detergent, white for sanitizer, and blue for rinse aid.
2.2.1. Electrical*
The EST Dishmachine must be hard wired directly to a dedicated 115 VAC, 60Hz circuit
equipped with proper circuit protection. The main power switch is at the top-right side of the
control box.
2.2.2. Plumbing*
The water supply connection is made with a ½” hot water line to the water supply inlet on the top
of the machine. The water supplied to the machine is recommended to be 140° F. The time
necessary to deliver water to the machine is controlled by the number four cam. This cam
provides the serviceman with the opportunity to fine tune the machine to deliver the proper
amount of water with each cycle.
The EST Dishmachine has a 2” drain. The following section explains how to connect the drain.
*Electrical and plumbing connections must be made by a qualified person who will comply with all
available Federal, State, and Local Health, Electrical, Plumbing and Safety codes

Getting Started
MODEL EST SERVICE & PARTS MANUAL Rev. 1.08Page 5
2.2.3. Connecting the Scrap Accumulator and Drain
The scrap accumulator is designed to perform two basic functions:
1. It allows a method to discharge all the heavy solids out of the machine with each
wash cycle.
2. It provides accumulation capacity to allow draining the contents of one cycle
regardless of the discharge rate of the existing drain.
The drainpipe is connected to the scrap accumulator drain using a 2” no-hub connector as shown
in Figure 2.2.3 below.
2" DRAIN
SLEEVE 2"
NO-HUB 2" DRAINPIPE
SCRAP ACCUMULATOR
HOSE
CLAMPS
Figure 2.2.3

MODEL EST SERVICE & PARTS MANUAL Rev. 1.08Page 6
3. Operation
3.1. Initial Setup
All machines are equipped with switches to prime the peristaltic pumps at anytime the master
switch is "ON".
Following completion of the installation, always fill the machine with water before starting
machine.
1. With the power “ON” hold the fill button until the water level overflows into the scrap
accumulator.
2. Check the chemical lines to the chemical containers.
a. Red: detergent line.
b. Blue: rinse agent line.
c. Clear/White: sanitizers destainer line.
3. Activate the prime switches for the three chemical pumps until product is
discharging into the machine.
4. To start the machine, close the doors - this will automatically start the machine. The
machine will run through its cycle.
5. Operate the machine one cycle and watch to ensure that the chemicals are
delivered and stop during the cycle. Remember: red tube - detergent: blue tube -
rinse: and clear/white tube - sanitizer. Check temperature at the end of the cycle for
140°F, 60°C.
The amount of product delivered by each cam is controlled by adjusting the cam’s
opening. When the micro switch rides down into the cam the peristaltic pump motor
begins to rotate. It will continue to rotate until it rides up out of the groove.
Therefore, to extend the amount of product delivered to the machine, open the
grove; to reduce the amount of product delivered to the machine, close the groove.
The cams are slip fit and a cam adjustment wrench is provided.
CAUTION: The motors on the new peristaltic pumps may be stalled by excessive tightening of
the cover plate screws. If a peristaltic pump does not turn when the micro switch is activated,
loosen the screws on the cover plate.
Technical personnel are available during normal business hours at CMA Headquarters should
you, as an installer, have any questions please call 800-854-6417.

Operation
MODEL EST SERVICE & PARTS MANUAL Rev. 1.08Page 7
3.2. Startup Procedures
Please follow the instructions given here before each shift to assure trouble free operation.
2. Drain the water if it is cold by activating the drain switch until all the water is
out of the machine.
3. Check the drain screen and, if needed, remove it from the machine and clean
it out. After cleaning, replace it properly into the sump housing.
4. Check the wash arm spray tips. If they are clogged, clean them with a
toothpick and rinse them at the sink. Replace the wash arms.
5. Press and hold the fill switch until the water overflows into the scrap
accumulator.
6. Once a proper water level is established, check the temperature of the water
(it should be approximately 140°F, 60°C).
7. Insert the tray of dishes into the machine and close the doors. The machine
will automatically start when the doors are closed.
8. After the machine stops, raise the doors, remove the tray of dishes and allow
to dry before stacking.
If the doors are lifted during a cycle, the machine will automatically stop running.
The EST will run through the wash and rinse cycles automatically feeding the proper chemicals
and then turn itself off.
In an emergency you can turn off the machine by turning off the master switch located on the side
of the control box.

Operation
MODEL EST SERVICE & PARTS MANUAL Rev. 1.08Page 8
3.3. Quick service guide
MODELS: EST
TECHNICAL ISSUE
Cause
Solution
Machine starts while doors are
open
Faulty magnetic door switch
Replace the switch, P/N 00557.55
Faulty start/fill switch
Replace the switch, P/N 03470.01
Faulty #1 micro switch (start/stop)
Replace micro switch, P/N 00411.00
Continuous cycles
Faulty start/fill switch
Replace micro switch, P/N 00411.00
Faulty door switch
Replace the switch, P/N 00557.55
Delimer switch in wrong position
Switch to NORMAL
position
Wash motor runs continuously
Faulty delime switch
Replace the switch, P/N 00475.00
Faulty motor contactor
Replace contactor, P/N 00404.82
Delimer switch on wrong position
Switch to NORMAL
position
Sanitizer pump does not run
Faulty delimer switch
Replace the switch, P/N 00475.00
Faulty # 6 micro switch
Replace micro switch, P/N 411.00
Faulty sanitizer pump motor
Replace the motor, P/N 00416.00
Broken Spring
Replace spring, P/N 00105.82
Drain valve does not operate
Faulty #3 Micro switch
Replace micro switch, P/N 00411.00
Faulty drain motor
Replace drain motor, P/N 00104.82
Faulty #4 micro switch (Fill)
Replace micro switch, P/N 00411.00
Debris inside water solenoid valve
Clean valve replace diaphragm kit,
P/N 00707.00
Machine does not fill
Faulty start/fill switch
Replace the switch, P/N 03470.01
Drain not closing
check function of drain sys.
Faulty water solenoid coil/valve
Replace coil/valve, P/N 00738.10 or
03603.10
Faulty check valve
Replace valve, P/N 00718.00
Water leaks out of vacuum breaker
Low incoming water pressure
Increase water pressure to 20 psi
Faulty vacuum breaker kit
Replace vac. Brkr kit, P/N 03623.00
Machine only runs when start/fill
switch is depressed
Faulty #1 micro switch (start/stop)
Replace micro switch, P/N 00411.00
Faulty magnetic door switch
Replace door switch, P/N 00557.55
Will not start/ nothing works
Wall breaker tripped
Reset breaker
Master on/off switch faulty or in off
position
Reset or replace switch, P/N 00471.10
Runs, but none of the other
functions engage
Faulty #2 Micro switch (cycle
reset)
Replace micro switch, P/N 411.00
Faulty ice cube relay (yellow relay)
Replace relay, P/N 00636.00

Operation
MODEL EST SERVICE & PARTS MANUAL Rev. 1.08Page 9
3.4. Troubleshooting
PROBLEM LIKELY CAUSE SOLUTION
Machine inoperative Power off at circuit breaker Reset circuit breaker
Defective power switch Replace power switch
P/N: 00471.10
Motor inoperative Door is not fully closed Close door
Defective door safety switch Replace door safety switch
P/N: 00562.00
Defective timer assembly Replace timer assembly*
P/N: 00407.83
Defective pump motor contactor Replace contactor
P/N: 00404.82
Defective motor Replace motor
P/N: 00201.00
Defective Delime-Off-Normal
Switch Replace Toggle switch
P/N: 00475.00
Motor runs with door open Defective door safety switch Replace door safety switch
P/N: 00562.00
Defective pump motor contactor Replace contactor
P/N: 00404.82
Water temperature below
120° F. Low incoming water temperature Turn up supply water heater
Insulate supply water pipe
Cold water mixing with supply Isolate hot water from cold
water
Defective thermometer
(actual temperature is okay) Replace thermometer
P/N: 03202.00
Low rinse water flow Limed up rinse arm spray nozzles Delime rinse arm nozzles
No rinse water flow Defective water solenoid valve Replace water solenoid valve
P/N: 03603.10
Rinse water runs with door
open Defective door safety switch Replace door safety switch
P/N: 00562.00
With power on, activating
start switch does not begin
cycle
Defective fill/start switch (running
light will not light either) Replace toggle switch
P/N: 03470.01
Defective timer assembly Replace timer assembly*
P/N: 00407.83
*The timer assembly motor (P/N: 00407.83) or micro switches (P/N: 00411.00) can be replaced
independently if that’s the only component that’s failed.