Owner’s Manual
Keep with machine for reference
MODEL CMA-180UC
INSTALLATION & OPERATION
Rev 1.16B
CMA DISHMACHINES
12700 KNOTT AVENUE
GARDEN GROVE, CALIFORNIA 92841
800-854-6417
FAX 714-895-2141
www.cmadishmachines.com
TABLE OF CONTENTS
MODEL CMA-180UC
1.
SPECIFICATIONS ........................................................................................ 2
1.1.
CMA-180UC ......................................................................................................................... 2
1.2.
CMA-180UC OPERATIONAL CYCLE ...................................................................................... 3
2.
GETTING STARTED..................................................................................... 5
2.1.
INTRODUCTION TO CMA-180UC ........................................................................................... 5
2.2.
RECEIVING AND INSTALLATION.............................................................................................. 6
3.
2.2.1.
Electrical ....................................................................................................................... 6
2.2.2.
Plumbing........................................................................................................................ 6
2.2.3.
BETA Detergent And Rinse Dispenser (Optional). ........................................................ 7
2.2.4.
NOVA Detergent and Rinse Dispenser (Optional). ....................................................... 8
2.2.5.
Safe Ttemp Feature .......................................................................................................10
2.2.6.
Water Tempering Kit ....................................................................................................11
2.2.7.
Booster Heater Setup ....................................................................................................12
2.2.8.
Installers Checklist .......................................................................................................12
OPERATION ............................................................................................... 13
3.1.
INITIAL SETUP .......................................................................................................................13
3.1.1.
Flow Disc (New Models). .............................................................................................13
3.1.2.
Rinse Pressure Regulator (Old Models Prior January 2008).......................................13
3.1.3.
Rinse and Wash Temperatures .....................................................................................13
3.1.4.
Post Instructions ...........................................................................................................13
3.2.
STARTUP PROCEDURES..........................................................................................................13
3.3.
OPERATING AND CLEANING INSTRUCTIONS ..........................................................................14
3.4.
PREVENTIVE MAINTENANCE CHART .....................................................................................15
3.5.
QUICK SERVICE GUIDE ...........................................................................................................16
3.6.
TROUBLESHOOTING ...............................................................................................................17
4.
PARTS KIT ................................................................................................. 20
4.1.
INITIAL PARTS KIT (P/N 1100.66) .........................................................................................20
4.2.
DRAIN PUMP .........................................................................................................................21
4.3.
DRAIN PUMP REMOVAL INSTRUCTIONS ................................................................................22
5.
CUSTOMER NOTICE ................................................................................. 23
6.
ELECTRICAL DIAGRAM ............................................................................ 24
www.cmadishmachines.com
1. Specifications
1.1.
METRIC
EQUIVALENT
CMA-180UC
WATER CONSUMPTION
PER RACK
.75 GAL.
(2.83 L)
PER HOUR
17.9 GAL.
(67.6 L)
WASH TIME-SEC
94
94
RINSE TIME-SEC
16
16
DWELL TIME-SEC
10
10
2 MIN.
2 MIN.
30
30
WASH TANK CAPACITY
2.5 GAL.
(9.46 L)
PUMP CAPACITY
38 GPM
(144 LPM)
REQUIRED MINIMUM TEMP. *
110°F
(43°C)
RECOMMENDED TEMP. **
140°F
(60°C)
WATER INLET
½”
1.27cm
DRAIN CONNECTION
1”
2.54cm
OPERATING CYCLE
TOTAL CYCLE
OPERATING CAPACITY
RACKS PER HOUR
WATER REQUIREMENTS
RINSE PRESSURE SET
2
20 PSI±5 PSI
1.41 kg/cm
WASH-°F
150°F -160°F
(65.5°C/71°C)
RINSE -°F
180°F -195°F
(82°C/90°C)
CYCLE TEMPERATURES
FRAME DIMENSIONS
DEPTH
25”
(63.5 cm)
WIDTH
24”
(60.96 cm)
HEIGHT
33 ¼”
(84.45 cm)
MAX CLEARANCE FOR DISHES
14.5”
(36.8 cm)
208 VOLTS
1 PH—60 Hz
230 VOLTS
1 PH—60 Hz
33 AMPS
35 AMPS
5.3 kW
6.5 kW
1 HP
1 HP
ELECTRICAL RATING*
BOOSTER HEATER
WASH PUMP MOTOR
THIS SYSTEM REQUIRES THREE POWER WIRES, WHICH INCLUDES A
CURRENT CARRYING NEUTRAL. AN ADDITIONAL FOURTH WIRE MUST BE
PROVIDED FOR MACHINE GROUND.
SHIPPING WEIGHT
234#
(106 kg)
* For machines having "SAFETY TEMP" feature. ** For faster heat recovery.
Note: The required flowing water pressure to the dishwasher is 15-65 PSIG. If pressures higher than
65 PSIG are present, a pressure regulating valve must be installed in the water line to the dishwasher
(by others). If flowing pressure is lower than 15 psi, improper machine operation may result.
MODEL CMA-180UC INSTALLATION & OPERATION MANUAL Rev. 1.16B
Page 2
1.2.
CMA-180UC Operational Cycle
The CMA-180UC Operational Cycle has a total cycle time of 2 minutes (120 seconds). The
Timing Diagram and the steps listed below detail the individual functions that are executed
during each Operational Cycle.
Seconds: 0
10
20
30
40
50
60
70
80
90
100
110
120
Instant
Start Relay
Cam Timer
Motor Cam
Rinse Cycle
Cam
Wash Cycle
Cam
Optional Drain
Pump Cam
Safe-TTemp Cam
1. With the machine powered up toggling the START switch begins a cycle.
a) Toggling the START switch energizes both the Cam Timer motor and the Instant Start
Relay. The Instant Start Relay latches ON the power to the Cam Timer motor so that
the START switch can be released a moment after it has been toggled without the Cam
Timer motor losing power.
b) After about 1.5 seconds the Cam Timer’s first cam—the Cam Timer Motor Cam—
latches ON the power to the Cam Timer motor and drops out the Instant Start Relay.
The Cam Timer motor continues to run for a total of 2 minutes, at which time it
switches OFF—resetting the Cam Timer—and waits for the next START command.
2. The Cam Timer’s third cam controls the Wash Pump. The Wash Pump comes ON about 3
seconds into the Operational Cycle and continues to run for 94 seconds. This 94-second
period is the Wash Cycle.
3. At the same time that the Wash Pump comes ON the Cam Timer’s fourth cam powers ON
the Optional Drain Pump—if one is present—and keeps it running for about 7 seconds
before powering OFF. This cam turns ON again midway through the Rinse Cycle and
stays ON for 10 seconds, turning OFF 2 seconds after the Rinse Cycle has completed.
4. About 3 seconds after the Wash Cycle has completed the Cam Timer’s second cam, which
controls the Rinse Cycle, turns ON—energizing the Water Solenoid—and stays ON for 16
seconds. This 16-second period is the Rinse Cycle.
MODEL CMA-180UC INSTALLATION & OPERATION MANUAL Rev. 1.16B
Page 3
5. When the cam timer assembly approaches the final rinse portion of the cycle, the “Safe-TTemp” sixth micro switch will pause cam timer assembly if the booster heater has not
reached 180 degrees. Machine will remain in wash cycle mode until 180-degree rinse
temperature is reached, and at this time the cam timer will advance automatically into the
rinse cycle and dispense 180 degrees rinse water over the dishes.
MODEL CMA-180UC INSTALLATION & OPERATION MANUAL Rev. 1.16B
Page 4
Getting Started
2. Getting Started
2.1.
Introduction to CMA-180UC
The CMA-180UC is a hot water sanitizing, single rack, under-counter dishmachine. It is a
standalone machine featuring a self-contained booster heater. The only external connections
necessary are power supply, water supply, drainpipe, and optional chemical dispensers. The
machine uses re-circulated wash water and fresh water final-rinse.
Operation of the CMA-180UC is extremely user friendly. To initially fill the machine each day,
push the switch marked “FILL”. The machine is full when water begins to flow into the scrap tray.
The booster tank heater will maintain the wash water temperature at 155°F. The booster heater
will produce a minimum of 180°F final rinse water each cycle.
The supply water to the CMA-180UC must be a minimum of 140°F at 24 PSI (Pounds per Square
Inch) with a 6 GPM (Gallons Per Minute) flow rate and 60 GPH (Gallons Per Hour) recovery rate.
The pipe supplying the water must be ½” minimum. The plumbing connection is located at the
back of the machine. (See specification sheet on page 2).
The drain is a 1" barbed fitting on the back of the machine for easy attachment of your drain
hose.
The machine retains the features of the standard CMA-180 Series in that it has a scrap tray and
the manner in which the tank is filled ensures that the dishes are always rinsed with fresh water
instead of re-circulated water. The CMA-180UC is the first under-counter dishmachine of its kind
to discharge soil from the wash tank into a scrap tray outside of the wash chamber. This feature
keeps the wash water much cleaner over long periods of time. The scrap tray may be emptied on
a periodic basis without interruption of the flow of work, thereby providing a much cleaner
environment for the wash and rinse cycle. There are also enhancements that can be chosen
when required such as drain pump kits and other accessories. Refer to Section 4 “Parts ” for the
parts list and accessories available for the machine.
This manual is structured to provide a complete reference guide to the CMA-180UC. 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 for the machine when problems occur.
We are committed to providing the best machines and customer service in the food industry and
your feedback is welcome.
DISCLAIMER OF LIABILITY OF WARRANTY: CMA EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES, EXPRESS OR IMPLIED, RELATING TO THE INSTALLATION OF ANY AND ALL
CMA EQUIPMENT THAT IS INSTALLED BY CHEMICAL DEALERS, CONTRACTED SERVICERS OR THIRD PARTY SERVICERS TO CMA EQUIPMENT.
IF THE INSTALLATION
INSTRUCTIONS ARE NOT FOLLOWED EXACTLY (TO THE LETTER), OR, IF ANY PERSON OR COMPANY CONDUCTING THE INSTALLATION OF THE CMA EQUIPMENT, REVISE THE
INSTALLATION PROCEDURES OR ALTER THE INSTRUCTIONS IN ANY MANNER, THE CMA WARRANTY BECOMES VOID. IF, DUE TO THE IMPROPER INSTALLATION OF CMA
EQUIPMENT, THIS EQUIPMENT CEASES TO OPERATE PROPERLY OR AFFECTS OTHER PARTS OF THE CMA DISHWASHING EQUIPMENT, IN THAT THE OTHER PARTS BECOME
DEFECTIVE, THE CMA WARRANTY BECOMES VOID. CMA WILL NOT BE LIABLE OR RESPONSIBLE OR WARRANT CMA EQUIPMENT, DUE TO IMPROPER INSTALLATION OF ANY
CMA MODEL DISHWASHER.
MODEL CMA-180UC INSTALLATION & OPERATION MANUAL Rev. 1.16B
Page 5
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 packaging material. Unwrap the machine and check for the following
component parts:
The Wash Tank Scrap Screen is shipped inside the wash cavity of the machine. This screen must
be in place during operation. It has been designed to perform two basic functions:
1. Strain water that is circulating through the spray arms and pump assembly.
2. A basket to catch broken glass, or heavy solids that may plug the impeller.
Set the machine in place, and level from side-to-side and front-to-back to prevent door leaks.
Steam generated from normal operation may escape from door. Wood, laminates, veneers, etc.
are unsuitable materials for use in areas exposed to dishwasher steam and detergents. Stainless
steel or other moisture-resistant shields are recommended for surfaces adjacent to sides and
tops of under counter dishwashers.
2.2.1. Electrical 1
Prior to installation make sure the electrical supply is compatible with the specifications on the
machines data plate.
Single-phase 230 volt, 60 Hz dedicated circuit should be used to supply electrical energy to the
CMA-180UC dishwasher (see specification sheet page 2). This system requires three power
wires, which include a current carrying neutral. An additional fourth wire must be provided for
ground. Approximately 4-feet of ¾” flexible conduit with power leads (L-1, L-2, Neutral and
Ground) extending out of the conduit are provided for easily connecting the power at installation.
The power connection must be located such that there is sufficient length of the flexible conduit
remaining to permit the machine to be moved for cleaning.
WARNING: Electrical and grounding connections must comply with the applicable portions of the
National Electrical Code and/or other local electrical codes.
Note: For supply connections, use copper wire only rated at 90 degree C minimum.
2.2.2. Plumbing2
Notice to Plumber: The plumber connecting this machine is responsible for making certain that
the water lines are THOROUGHLY FLUSHED OUT BEFORE connecting to the dishwasher.
The machine is equipped with a ½” NPT connection located at the lower left-hand corner (facing
the back) of the machine. A 140°F water line should be plumbed to this point (see specification
sheet page 2). The water line used must be of sufficient length and flexibility to permit the
machine to be moved for cleaning.
The supply water to the CMA-180UC must be a minimum of 140°F at 24 PSI (Pounds per Square
Inch) with a 6 GPM (Gallons Per Minute) flow rate and 60 GPH (Gallons Per Hour) recovery rate.
The pipe supplying the water must be ½” minimum. The plumbing connection is located at the
back of the machine. (See specification sheet on page 2).
Note: high iron levels in the water supply can cause staining and may require an iron filter. High
chlorine levels in the water supply can cause pitting and may require a chloride removal system.
If an inspection of the dishwasher or booster heater reveals lime buildup after the equipment has
been in service, water treatment is recommended. If water softener is already in place, ensure
there is a sufficient level of salt.
1,2
All 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
MODEL CMA-180UC INSTALLATION & OPERATION MANUAL Rev. 1.16B
Page 6
Warning: If water pressure exceeds 50 PSI, pressure reducing valve (PRV) is recommended.
The CMA-180UC is supplied with a drain pump for elevated drains. For floor gravity drain
applications the drain pump should not be used and a good commercial grade hose needs to be
connected to the discharge side of the diverter valve (drain valve) and run to the floor drain. If
removing a drain pump, safe-end (insulate electrically) the white and purple wires and secure
them out of the way. If a drain pump is used with a floor drain, the drain hose must rise 12 to 16”
before dropping to the floor drain (to reduce any chance of the pump cavitations).
Warning: Water hardness greater than 3 grains per gallon requires a water softener to prevent
damage to heating elements (scale build- up) and booster tank rinse flow restriction. Rinse flow
restriction will cause the booster tank to expand and contract causing metal flex, which will
eventually crack the tank.
2.2.3. BETA Detergent And Rinse Dispenser (Optional).
Optional built-in Beta dispenser (CMA p/n 14585.00) has easy access for chemical settings
behind the front kick panel. Both initial charge and recharge are factory pre-set. Basic settings for
both detergent and rinse speed are 50%. Operating fine-adjustment screws on the dispenser can
control the amount of chemicals drawn into chemical lines.
Undercounter machine with the optional dispenser must be ordered separately, as option at time
of order. Optional dispenser has to be pre-wired prior to shipment (see electrical diagram for
wiring options).
Note: Use only commercial-grade detergents and rinse aids recommended by your chemical
professional. Do not use detergents and rinse aids formulated for residential dishwashers.
MODEL CMA-180UC INSTALLATION & OPERATION MANUAL Rev. 1.16B
Page 7
2.2.4. NOVA Detergent and Rinse Dispenser (Optional) 1.
The NOVA Detergent and Rinse Dispenser has its own reference manual.
Familiarize yourself with the dispenser’s reference manual before proceeding with
installation.
1. The NOVA dispenser is pre-wired with a multi-conductor electrical cable that is to
be run through a conduit to the power block inside the control panel drawer. Use
a ½” watertight conduit meeting all local and national codes. A conduit fitting is
present on the bottom of the dispenser where the power cable exits. A mounting
plate to receive the ½” conduit is provided on the top right-hand corner (facing
the back) of the machine.
i.
Run an appropriate length of ½” conduit from your dispenser to the mounting
plate where it will be secured. The conduit needs to be of sufficient length
and flexibility to permit the machine to be moved for cleaning without having
to disconnect any wiring.
ii.
Run your dispenser wires through the conduit and through the enclosed area
across the top of the machine and then feed them through the access hole
provided in the back of the control panel drawer.
iii. With the machine’s power “OFF”, connect your detergent and rinse dispenser
wires to the power block supplied and labeled (“DISPENSER 110V - 3 AMPS
MAX”) inside the control panel drawer. The table that follows lists the
function of each conductor of the multi-conductor electrical cable.
Wire Colors
Circuit Voltage
Function
Gray/Violet
Black
Brown
90 VAC-130 VAC 50/60 Hz
90 VAC-130 VAC 50/60 Hz
No Connection. Insulate this wire!
Main AC Power
Main AC Power
This wire is LIVE!
Yellow
White/Yellow
90 VAC-130 VAC 50/60 Hz
90 VAC-130 VAC 50/60 Hz
Detergent Signal
Detergent Signal
Violet
White/Violet
90 VAC -130 VAC 50/60 Hz
90 VAC -130 VAC 50/60 Hz
Rinse Signal
Rinse Signal
The individual conductors need to be connected as shown in Figure 2.2.4
and as described on next page.
1
All 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
MODEL CMA-180UC INSTALLATION & OPERATION MANUAL Rev. 1.16B
Page 8
Brown (LIVE) wire
Multi-conductor cable
Rinse Signal wires
(Blue terminals)
Detergent Signal wires
(Red terminals)
Black (Main Power)
Gray/Violet
(Main Power Neutral)
(Same terminal as rinse neutral)
Note: Machine Neutral
(White wires)
Figure 2.2.4
Note: In Figure 2.2.4 the machine’s wire harness was left out of the back of the
power block to more clearly show the dispenser wires.
2. Remove the plug from the mixing chamber located by the vacuum breaker on the
back of machine; and install the rinse injection fitting (supplied with your
dispenser). See Figure 2.2.4.
Figure 2.2.4.
3. A 7/8" detergent injection hole is provided in the back of the wash tank. Remove
the S.S. plug and install the detergent fitting (supplied with your dispenser).
4. The final step of installing the CMA supplied Detergent and Rinse Dispenser is
programming it to your specific application. The reference manual supplied with
the dispenser shows you how to program it.

Keep in mind while reading the reference manual that the CMA-180UC
operates in “probe-less” mode. (This mode is selected by setting a value of
“2” in screen 21).

Screen 22 must be set to “1” (Door).
MODEL CMA-180UC INSTALLATION & OPERATION MANUAL Rev. 1.16B
Page 9
2.2.5. Safe Ttemp Feature
The CMA “SafeTtemp” feature assures the final rinse cycle is always at a consistent minimum of
180 degrees.
th
How it works: the “SafeTtemp” function operates off the 5 cam (labeled “SafeTtemp”) on the
timer assembly. When the cam timer assembly completes the wash cycle, and approaches the
final rinse portion of the cycle, the “SafeTtemp” micro switch will drop into the cam slot and pause
cam timer assembly if the booster heater has not reached 180 degrees. Machine will remain in
wash cycle mode until 180 degree rinse temperature is met, and at this time the cam timer will
advance automatically into the rinse cycle and dispense 180 degrees rinse water over the dishes.
Note: if Safe Ttemp cam is not to be used, it becomes a spare cam.
CMA -180“SafeTtemp” Installation Instructions:
1) Remove the 4cam timer assembly (note wire colors and wire placement for all 4cam
timer micro switches) and install 5cam timer in its place.
2) Place all wires removed from 4cam timer assembly in exact position on 5cam timer
assembly.
3) The cam timer motor receives (1) yellow wire and (1) white wire (re-connect the yellow
wire only from dishmachine harness to the motor).
4) The “SafeTtemp” 5 cam timer assembly kit includes a two white harness – connect white
wire with female bullet connector to the timer motor, stripped end to #22/NC on contactor,
th
and spade end to center terminal 5 micro switch.
5) Connect white wire with male bullet connector from the kit to the white wire with female
bullet connector coming from dishmachine harness, stripped end to #21/NC on contactor,
th
and spade end to top terminal on 5 micro switch.
L1
L2
L3
HEATER CONTACTOR
T1
T2
T3
21
A1
N/C
22
SafeTtemp
harness
A2
Dishmachine
harness
Female bullet
connector
Male bullet
connector
Female bullet
connector
Male bullet
connector
MODEL CMA-180UC INSTALLATION & OPERATION MANUAL Rev. 1.16B
Page 10
2.2.6. Water Tempering Kit
MODEL CMA-180UC INSTALLATION & OPERATION MANUAL Rev. 1.16B
Page 11
2.2.7. Booster Heater Setup
The booster tank must be filled with water before the heating element is energized.
For this reason the “High Limit Switch” has intentionally been disconnected at the
factory and will require re-connection before the heating element will turn on.
Follow the procedure below to complete the initial installation:
1. Close the door on the machine.
2. Turn the Power switch to the "ON" position.
3. Hold the “FILL” switch in until water overflows into the scrap tray.
4. Turn the Power switch to the "OFF" position.
5. Connect blue wire with disconnect, identified by red tag, to the High Limit
Switch which is located behind the thermostat behind the front kick panel.
2.2.8. Installers Checklist

Dishmachine checked for concealed damage

Hot water supply is 140° F (60 C) — minimum

Incoming water supply line is ½” — minimum

Incoming water supply is 6 GPM minimum at 24 PSI

Supply circuit breaker for machine is properly sized (50 amp)

Service voltage and phase type are correct to machine data plate

If drain pump is used, drain hose rises 12 to 16” before dropping to drain

Drain hose is installed with air gap (discharge 1” above drain)

Optional detergent and rinse dispenser (if present) is properly installed

Dishmachine is properly grounded

Dishmachine is properly leveled

Machine circuit breaker is labeled “DISHWASHER”

Machine has been “hard-wired” with correctly sized wire

Booster tank has been filled with water (before High Limit Switch is reset)

High Limit Switch for heater has been reset (after Booster Tank has been filled)
MODEL CMA-180UC INSTALLATION & OPERATION MANUAL Rev. 1.16B
Page 12
3. Operation
3.1.
Initial Setup
3.1.1. Flow Disc (New Models).
Flow Disc has been placed on the exit side of the water valve. The Flow Disc
reduces pressure to the standard recommended 20 PSI.
3.1.2. Rinse Pressure Regulator (Old Models Prior January 2008).
The CMA-180UC requires a supply water input pressure of 24 PSI minimum. This
pressure is then reduced by the supply water regulator. Use the following procedure
to adjust the rinse pressure to 20 PSI:
1. Close the door on the machine.
2. Turn the Power switch to the "ON" position.
3. While holding the “FILL” switch—to activate the water solenoid—adjust the
pressure regulator until the gauge reads 20 PSI. (Regulator is located behind
the front kick panel).
3.1.3. Rinse and Wash Temperatures
1. Turn the Power switch to the "ON" position.
2. After the machine has warmed up for about ten-minutes, note the wash and
rinse temperatures. The wash temperature must be 155°F minimum. The
3
rinse temperature must be 180°F minimum . If necessary, adjust the
temperatures by removing the front kick panel and turning the thermostat
adjustment clockwise to increase, counterclockwise to decrease. This one
adjustment controls both temperatures.
3.1.4. Post Instructions
Install wall chart and instruct machine operator on proper cleaning and
operation of the CMA-180UC.
3.2.
Startup Procedures
1. Open the door of the machine and check that the scrap screen is in place, and that
the spray arms and end plugs are secure.
2. Close the door of the machine and turn the Power switch to the "ON" position.
3. Hold the fill button about 25 seconds or until the water overflows into the scrap tray.
4. Once the water is filled to the proper level, press the rocker switch marked “START” –
the machine will automatically begin its cycle.
5. Check machine’s operating temperatures — Adjust if necessary. See section 3.1.3
Rinse and Wash Temperatures.
6. At the end of the wash period, drain the machine by pushing the rocker switch
marked “DRAIN”. Clean the wash tank screen and scrap tray screen. Remove and
clean the spray arms. (See wall chart instructions).
3
Rinse cycle temperature must be observed during a rinse cyclewhile the machine is in operation.
MODEL CMA-180UC INSTALLATION & OPERATION MANUAL Rev. 1.16B
Page 13
Parts Manual
3.3.
Operating and Cleaning Instructions
MODEL CMA-180UC INSTALLATION & OPERATION MANUAL Rev. 1.16B
Page 14
Parts Manual
3.4.
Preventive Maintenance Chart
MODEL CMA-180UC INSTALLATION & OPERATION MANUAL Rev. 1.16B
Page 15
Parts Manual
3.5.
Quick service guide
MODEL: CMA 180UC HIGH TEMP UNDER COUNTER
TECHNICAL ISSUE
CAUSE
SOLUTION
Pressure regulator is not set properly Set regulator to 18-20 psi
Faulty rinse micro switch
Replace micro switch, P/N 00411.00
Drain hose elevated too high
Must be lowered to goose neck level
Obstruction in drain hose
Check hose & clean
Scrap exit screen
Clean exit screen
Faulty drain pump
Replace pump, P/N 15503.00
Machine not level
Adjust machine legs to level
Machine is leaning forward
Adjust machine legs to level
Wash arm end cap missing
Replace end cap, P/N 00308.20
Door gasket
Loose wire at display, board or
transformer
Replace gasket, P/N 14506.60
Secure connectors
Faulty temperature sensing wire
Correct, replace, P/N 03202.66
Faulty temperature sensing unit
Replace unit, P/N 03203.00
Faulty transformer
Replace transformer, P/N 03202.60
Clean scale from heater
Adjust thermostat
Rinse water temperature low /high
Scaled heating element
Booster heater’s thermostat not
properly set
Incoming water temperature to
booster heater below 140 F
Adjust external water heater in the facility
Pump motor not running
Loose lead connections
Faulty # 3 micro switch
Check and crimp connectors
Replace micro switch, P/N 00411.00
Faulty contactor
Replace contactor, P/N 15504.00
Faulty wash pump motor
Faulty # 3 micro switch
Replace wash pump motor, P/N 00201.00
Replace micro switch, P/N 00411.00
Scrap trap over flows
Door leaks
Thermometer failure
Pump motor runs continuously
Faulty contactor
Replace contactor, P/N015504.00
Water regulator not adjusted properly Adjust regulator to 18-20 PSI
Low water pressure at the final rinse
Scrap trap overflows over night
Poor cleaning results
Wash tank will not drain.
Clogged final rinse spray jets
Missing final rinse spray end cap
Clean jets
Replace end cap, P/N 00308.17
Low incoming water pressure from
facility
Increase pressure to 18-20 psi
Faulty water solenoid diaphragm
Clean or replace diaphragm, P/N 00706.00
Low wash or rinse water temp.
Check temperature settings
Wash arm bearing or jets
Clean bearing and arm jets
Rinse arm bearing or jets
Tank discharge screen dirty
Clean bearing and arm jets
Clean screen
Drain valve not operating
Check power to drain valve
Drain valve faulty
Replace Drain valve, P/N 04103.00
MODEL CMA-180UC INSTALLATION & OPERATION MANUAL Rev. 1.16B
Page 16
Parts Manual
3.6.
Troubleshooting
PROBLEM
LIKELY CAUSE
SOLUTION
Machine inoperative
Power off at circuit breaker
Reset circuit breaker
Defective power switch
Replace power switch
P/N: 15521.50
Motor inoperative
Door is open
Close door
Control panel is pulled out
Secure control panel
Defective reed switch
Replace reed switch
P/N: 00557.55
Defective timer assembly
Replace timer assembly*
P/N: 14408.80
Defective pump motor contactor
Replace contactor
P/N: 15504.00
Defective motor
Replace motor
P/N: 00201.66
Motor runs with door open
Defective reed switch
Replace reed switch
P/N: 00557.55
Defective pump motor contactor
Replace contactor
P/N: 15504.00
Heater (no heat)
High limit switch opened or
defective
P/N: 17523.51
Reset or replace switch
Defective thermostat
Replace thermostat
P/N: 13417.89
Defective heater contactor
Replace heater contactor
P/N: 15504.50
Defective heater
Replace heater
P/N: 15517.00
Heater (never turns off)
Defective thermostat
Replace thermostat
P/N: 13417.89
Defective heater contactor
Replace heater contactor
P/N: 15504.50
*The timer assembly motor (P/N: 00501.00) or micro switches (P/N: 00411.00) can be replaced
independently if that’s the only component that’s failed.
MODEL CMA-180UC INSTALLATION & OPERATION MANUAL Rev. 1.16B
Page 17
Parts Manual
PROBLEM
LIKELY CAUSE
SOLUTION
Low heat during operation
Low incoming water temperature
Turn up supply water heater
(below 140° F)
Insulate supply water pipe
Thermostat out of adjustment
Adjust thermostat
Cold water mixing with supply
Isolate hot water from cold
water
Defective heater
Replace heater
P/N: 15517.00
Low rinse water pressure
Regulator at maximum but
rinse pressure still low
Pressure regulator out of
adjustment
Adjust pressure regulator
Defective pressure gauge (actual
pressure is okay)
P/N: 13605.45
Insufficient water supply flow
Supply larger supply line
Defective water solenoid valve
Replace pressure gauge
Replace water solenoid valve
P/N: 03603.10
Low rinse water flow
No rinse water flow
Low rinse water pressure
See “Low rinse water
pressure” in PROBLEM
column
Limed up rinse arm spray nozzles
De-lime rinse arm nozzles
Defective water solenoid valve
Replace water solenoid valve
P/N: 03603.10
Defective (Rinse Relay) ice cube
relay
Replace ice cube relay
Rinse water runs with door
open
Defective reed switch
Replace reed switch
Water overflows scrap tray
onto floor
Drain hose is kinked
Un-kink drain hose
Drain hose is not properly
elevated before dropping to drain
(if drain pump is used)
Elevate drain hose 12 to 16”
above pump before dropping
to drain
P/N: 00631.00
P/N: 00557.55
Defective timer assembly
Replace timer assembly*
P/N: 14408.80
Defective drain pump
(if drain pump is used)
With power on, activating
start switch does not begin
cycle
Replace drain pump
P/N: 15503.00
Defective start switch (cycle light
will not light either)
Replace start switch
Defective timer assembly
Replace timer assembly*
P/N: 15521.00
P/N: 14408.80
*The timer assembly motor (P/N: 00501.00) or micro switches (P/N: 00411.00) can be replaced
independently if that’s the only component that’s failed.
MODEL CMA-180UC INSTALLATION & OPERATION MANUAL Rev. 1.16B
Page 18
Parts Manual
PROBLEM
LIKELY CAUSE
SOLUTION
Start switch requires > 1
second activation to run
cycle
Defective (Instant Start) ice cube
relay
P/N: 00631.00
Activating fill switch does
not fill machine
Defective drain/fill switch
Replace drain/fill switch
Replace ice cube relay
P/N: 15522.00
Defective water solenoid valve
Replace water solenoid valve
P/N: 03603.10
Fill (rinse water) won’t shut
off
Defective water solenoid valve
Replace water solenoid valve
P/N: 03603.10
Defective drain/fill switch
Replace drain/fill switch
P/N: 15522.00
Defective timer assembly
Replace timer assembly*
P/N: 14408.80
Activating drain switch
does not drain machine
Defective (Rinse Relay) ice cube
relay
Replace ice cube relay
Drain hose is kinked
Un-kink drain hose
Defective drain/fill switch
P/N: 00631.00
Replace drain/fill switch
P/N: 15522.00
Defective drain valve
Replace drain valve
P/N: 04103.00
Cycle light does not light
while cycle runs
Defective cycle light
Power light does not light
but machine runs
Defective power light
Wash tank or final rinse
temperature does not
display
Defective digital thermometer
Both the wash tank
temperature and the final
rinse temperature do not
display
Defective thermometer
transformer
Wash tank or final rinse
displays wrong
temperature
Defective digital thermometer
Replace cycle light (green)
P/N: 00406.60
Replace power light (red)
P/N: 00406.00
Replace digital thermometer
P/N: 03202.45
Replace thermometer
transformer
P/N: 03202.60
Replace digital thermometer
P/N: 03202.45
Defective thermister
Replace thermister
P/N: 03202.65
*The timer assembly motor (P/N: 00501.00) or micro switches (P/N: 00411.00) can be replaced
independently if that’s the only component that’s failed.
MODEL CMA-180UC INSTALLATION & OPERATION MANUAL Rev. 1.16B
Page 19
Parts Manual
4. Parts Kit
4.1.
Initial Parts Kit (P/N 1100.66)
P/N
DESCRIPTION
Qty
15504.00
Motor Contactor, 2-Pole 20 Amp
1
15504.50
Heater Contactor, 2-Pole 35 Amp
1
00501.00
2-Minute Timer Motor
1
00631.00
Ice Cube Relay 120 V
1
00707.00
½ Water Solenoid Repair Kit JE
1
00738.15
Solenoid Coil JE 220V
1
15523.00
Rocker Switch Start Momentary
1
15523.50
Rocker Switch Drain/Fill
1
15524.00
Rocker Switch Power Maintained
1
00556.10
Reed Switch
1
03623.00
1/2” Vacuum Breaker Repair Kit – Watts
1
00707.00
1/2” Water Solenoid Repair Kit – J/E
1
04113.00
L1X/L1-C Drain Valve 120V
1
00206.70
Pump Seal Kit
1
13417.89
Heater Thermostat
1
17523.60
High Limit Switch 200°F
1
00411.00
Microswitch
1
03203.01
Dual Temperature Display Kit
1
00738.15
Solenoid Coil JE 115V/60Hz
1
MODEL CMA-180UC INSTALLATION & OPERATION MANUAL Rev. 1.16B
Page 20
Parts Manual
4.2.
ITEM NO.
NO. REQ’D
Drain Pump
P/N
DESCRIPTION
ITEM NO.
NO. REQ’D
P/N
DESCRIPTION
1
1
15503.00
Drain Motor Ultra Jet for CMA-180UC
6
4
03101.00
Hose Clamp 1”
2
2
00932.50
Twist Tie
7
1
15603.00
Drain Line Gooseneck
3
1
15601.10
Black Drain Hose 1" ID X 3 1/2"
8
2
03801.10
10-32 SS Nut
4
1
15605.00
Drain Hose with Goose Neck
9
2
04806.00
#10 Brass Washer
5
1
15601.60
Robber Hose 90 Deg.
MODEL CMA-180UC INSTALLATION & OPERATION MANUAL Rev. 1.16B
Page 21
Parts Manual
4.3.
Drain Pump Removal Instructions
Drain Pump (P/N 15503.00) should only be used if a floor drain is not accessible to
the machine at installation.
When converting the UC-180 dishwasher to a gravity drain unit, remove the drain pump
assembly as shown in Figure 1. Re-route the 6Ft drain hose to the center port were the
drain pump was located, moving the displaced line to the open port of the valve. Insure
there is a 1” air gap between the discharge and floor drain as shown in Figure 2.
Disconnect
purple and white
wires
Remove this cover to
disconnect the wires
Remove this
hose clamp
over Drain
Valve.
Remove drain hose from
the drain gooseneck
Disconnect 3inch pump inlet
drain hose.
Figure 1
Figure
Figure 2
MODEL CMA-180UC INSTALLATION & OPERATION MANUAL Rev. 1.16B
Page 22
Parts Manual
5. Customer Notice
CMA-180UC Installation Guidelines
Improper installation of this product may void the warranty on this machine. Please follow
these guidelines for recommended installation and to ensure the warranty of this model is
authorized by CMA Dishmachines.
Dishmachine Installation Requirements
1. Machine must be level. Adjust leveling feet to accommodate uneven floor
surfaces.
2. Drain height should not exceed maximum height of 16”. If there is a floor
drain, it is highly recommended the pump drain be removed. Connect
supplied drain line to 3-way valve on back of machine and gravity feed to
the floor drain.
3. PRV must be adjusted not to exceed 20 psi. Recommended pressure is
between 18-20 psi.
4. Water supply to machine must be a minimum 120°F for 3 minute cycle
models and 140°F for 2 minute cycle models.
5. A four-wire, (neutral, ground and two 110v lines) 220v single phase
connection is required. There is a six foot cord provided with the machine.
CMA recommends a minimum 50-amp dedicated circuit, but you should
consult your local building code requirements for proper breaker size.
Activating/Adjusting the Booster Heater
1. Booster heater must be filled with water prior to connecting the blue wire
from high limit switch. The high limit switch can be found by removing the
front panel and locating the red button on the front of the heater tank.
2. Once the booster has been connected, the thermostat should be adjusted
to maintain 180°F during the final rinse cycle. The thermostat is located on
the front of the booster tank and is accessible by removing the front panel
on the machine.
Automatic Dispensing Equipment
1. Applications utilizing automated dispensers for administering warewash
chemicals must use 110v dispenser equipment. There is a 110v power
block for installing this equipment inside the control panel.
MODEL CMA-180UC INSTALLATION & OPERATION MANUAL Rev. 1.16B
Page 23
Electrical Diagram
6. Electrical Diagram
MODEL CMA-180UC INSTALLATION & OPERATION MANUAL Rev. 1.16B
Page 24
Electrical Diagram
MODEL CMA-180UC INSTALLATION & OPERATION MANUAL Rev. 1.16B
Page 25