SERVICE and PARTS
MANUAL
SD3 Series
SD3 |
ML-130232 |
F45576 (1015)
SD3 Series
TABLE OF CONTENTS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 MODELS COVERED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 REFERENCE MATERIAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 POWER-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 FILL CYCLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 BOOSTER TEMPERATURE CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
BOOSTER TEMPERATURE CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 READY MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 RUNNING A CYCLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 CHANGING CYCLE TIME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 CHANGING CYCLE TIME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 LUBRICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SERVICE PROCEDURES AND ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 CONTROL BOARD PROGRAMMING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 SERVICE PROGRAMMING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 TANK HEATER - TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 BOOSTER HEATER - TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 PUMP MOTOR - TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 THERMISTOR - TEST 1QTM, 2QTM & 3QTM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
QUICK CHECK USING SERVICE DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 MEASURING THERMISTOR RESISTANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 TRANSFORMER 1T - TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 TRANSFORMER 2T - TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 DELIMIMG PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 DOOR TENSION ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
ELECTRICAL OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 COMPONENT FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 COMPONENT LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 CONTROL BOARD / RELAY BOARD LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 CONTROL AND RELAY BOARD LEDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 WIRING DIAGRAM - 1 PHASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 WIRING DIAGRAM - 3 PHASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
25 |
|
QUICK REFERENCE CHART - ELECTRIC HEAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
25 |
||
CONTROL BOARD AND RELAY BOARD LEDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
27 |
||
CONTROL BOARD AND RELAY BOARD . . . . |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
27 |
|
OPERATING CONDITIONS . . . . . . . . . . . . . |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
27 |
|
NO DISPLAY AFTER ON KEY IS PRESSED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
28 |
||
NO FILL OR RINSE . . . . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
29 |
|
LONG FILL TIME (6 MINUTES) . . . . . . . . . . |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
30 |
|
NO WASH CYCLE . . . . . . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
30 |
|
NO TANK HEAT . . . . . . . . . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
31 |
|
SERVICE DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
32 |
|
SERVICE DIAGNOSTICS CHART . . . . . . . . . . . . . |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
33 |
|
OUTPUT TESTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
34 |
|
VERIFY CONTROL BOARD IS CONFIGURED AS AN SD3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
35 |
||
ERROR CODE CHART . . . . . . . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
35 |
|
TROUBLESHOOTING TABLE . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
35 |
|
PARTS CATALOG ............................................................................................................................................. |
|
36 |
|
F45576 (1015) |
© COMPETITIVE 2015 |
Page 2 of 37 |
|
SD3 Series - GENERAL
GENERAL
INTRODUCTION
This manual is applicable to the models and ML numbers listed on the cover page. Procedures apply to all models unless specified otherwise.
MODELS COVERED
SD3-H: Single water inlet. Incoming water of 110°F minimum is heated by a booster tank mounted on the machine. The machine is configured for a 70°F rise depending on incoming water temperature. The booster maintains water temperature to be used for 180°F final rinse.
SD3-P: Single water inlet. Water temperature to machine must be a minimum of 180°F for the final rinse. This water is provided by the customer external of the machine. The SD3-P has the option to be reprogramed to change from plain to chemical.
•Low water protection.
•One incoming plumbing connection to dishwasher through an electrically operated valve.
•The fill/rinse valve is installed prior to the 3.6 gallon booster tank.
•Supply flowing water pressure 20 ±5 psi.
•Provides a minimum 70°F rise with incoming water temperature of 110°F for a final rinse temperature of 180°F at 20 psi (flowing).
•The dishwasher, with the booster, can operate at full capacity with back-to-back cycles (SD3).
•SD3 machines are available in several operating voltages for single or three phase operation.
SPECIFICATIONS
•Operates as an atmospheric booster (SD3 with built-in booster).
ELECTRICAL SPECIFICATIONS
|
|
|
|
|
|
|
|
|
|
|
Minimum Supply |
|
Maximum |
||
Model |
|
Electrical Specs |
|
Rated Amps |
|
Circuit Conductor |
|
Overcurrent |
|||||||
|
|
|
|
|
|
|
|
|
|
|
|
Ampacity |
Protective Device |
||
SD3 with Electric |
|
208-240/60/1 |
|
|
43.0 |
|
|
|
50 |
50 |
|||||
|
208-240/60/3 |
|
|
24.9 |
|
|
|
30 |
30 |
||||||
Heat |
|
|
|
|
|
|
|||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
480/60/3 |
|
|
13.4 |
|
|
|
15 |
15 |
||||||
|
|
|
|
|
|
|
|
||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Booster Ampacity |
|
208-240/60/1 |
|
|
35.4 |
|
|
|
50 |
50 |
|||||
|
208-240/60/3 |
|
|
20.4 |
|
|
|
30 |
30 |
||||||
Ratings 8.5KW |
|
|
|
|
|
|
|||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
480/60/3 |
|
|
10.2 |
|
|
|
15 |
15 |
||||||
|
|
|
|
|
|
|
|
||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Optional SD3 Single |
|
208-240/60/3 |
|
|
45.4 |
|
|
|
60 |
60 |
|||||
Point Electrical |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
480/60/3 |
|
|
23.7 |
|
|
|
30 |
30 |
||||||
Service Connection |
|
|
|
|
|
|
|||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|||||||
|
|
|
|
WATER SUPPLY REQUIREMENTS |
|
|
|||||||||
Model |
|
Temperature |
|
|
Flowing |
|
Hardness |
|
Chlorides ppm |
Water Usage |
|||||
|
|
(minimum) |
|
Pressure |
|
grains/gal.1 |
|
||||||||
|
|
|
|
|
|
|
|
|
|||||||
SD3 -P (Plain) |
|
|
140°F |
|
|
20±5 psi |
|
Under 3 |
|
≤ 50 |
|
0.74 gal/rack |
|||
|
|
|
|
|
|
|
|
|
|
|
|
||||
SD3-H (Hot) |
|
|
110°F |
|
|
|
|
1 to 3 |
|
|
|||||
|
|
|
|
|
|
|
|
|
|
|
|
||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Page 3 of 37 |
|
F45576 (1015) |
|
SD3 Series - GENERAL
WATER SUPPLY REQUIREMENTS
Model |
Temperature |
Flowing |
Hardness |
Chlorides ppm |
Water Usage |
|
(minimum) |
Pressure |
grains/gal.1 |
||||
|
|
|
1 Water hardness below 4 grains/gal requires water treatment to reduce potential corrosion. Hardness above 6 grains/gal should be treated by water conditioner, water softener or in-line treatment.
MACHINE CYCLE TIMES AND CAPACITY (RACKS / HOUR)
|
Cycle |
|
Time in Seconds (maximun time settings) |
|
||||
Model |
|
|
Wash |
|
|
|
||
Settings |
1st 1/2 Fill |
2nd 1/2 Fill |
Dwell2 |
Rinse2 |
Sani-Dwell2 |
|||
|
Duration1 |
|||||||
|
|
|
|
|
|
|
||
|
1 |
Variable up |
Variable |
38 (38-99) |
|
|
|
|
|
|
|
|
|
|
|||
All |
2 |
120 |
2 (2-15) |
10 (10-35) |
7 (7-15) |
|||
to 150 |
75-120 |
|||||||
|
|
|
|
|
|
|||
|
4 |
360 |
|
|
|
|||
|
|
|
|
|
|
|||
1 Machine cycles 1, 2, and 4 are selected via the keypad. Cycle 1 wash duration is adjustable through the SERVICE PROGRAMMING mode, where the wash time can be adjusted to values above NSF minimums.
2 Dwell, rinse and sani-dwell times are adjustable to values above NSF minimums. Times chosen for each parameter will apply to all cycle selections.
REFERENCE MATERIAL
For replacement parts, refer to SD3 Catalog of Replacement Parts.
Refer to Lubrications Manual F-20067 for current values.
For operation and care instructions, refer to Operator's Manual.
POWER-UP
On power-up, the control board will perform a self-test. Once the control successfully completes and exits the selftest routine, the machine is ready for operation.
FILL CYCLE
The fill consists of two parts. The first part of the fill is defined as the time required to fill the tank until the float switch 1FS closes (150 seconds maximum). The time duration for the second part of the fill is equal to the time elapsed for the first part of fill multiplied by 1.25 (75 seconds minimum, 120 seconds maximum).
The chamber door must be closed for the fill/rinse solenoid (1SOL) to be energized and begin filling the tank. Opening the chamber door before the float switch is closed will de-energize the fill/rinse solenoid 1SOL suspending the fill cycle. When the chamber door is closed, the fill cycle will continue. If the
chamber door is opened any time after the float switch is closed, the fill cycle will be terminated, even if second part of fill did not complete. When the chamber door is closed after the float switch is closed, a wash cycle will begin.
If the float switch does not close after the maximum allowed time for the first half of fill (150 seconds), an [ E2 ] error code will be displayed. To clear an error from the display, cycle power by turning the machine off then back on. When the float switch closes, the controls will begin regulating tank heat. When the fill cycle is complete, the FILL icon turns off while the tank temperature continues to be displayed. The machine will continue heating the tank as required to reach and maintain the tank heat set point.
BOOSTER TEMPERATURE
CONTROL
Booster Temperature Control
NOTE: The Rinse Assurance is on by default for an SD3. Adjustments to this selection can be made by the service technician through CONTROL BOARD PROGRAMMING.
Once the initial fill is complete, if no cycles are run, the booster has eight minutes to reach its set point. If the booster does not reach temperature within the eight minute timeout, an error code [ EE ] will be displayed. To clear an error from the display, cycle power by turning the machine off then back on.
F45576 (1015) |
|
Page 4 of 37 |
|
SD3 Series - GENERAL
The control board is programed to cause the booster heater to turn on at the beginning of every rinse cycle and turn off at the end of the cycle. This occurs even if the booster water temperature meets or is above the booster temperature set point. Should the booster temperature be below the set-point, the booster heater will remain energized until set-point is achieved.
If the booster water temperature is below the booster temperature set point at the end of a wash cycle, and Rinse Assurance is enabled, the wash cycle will be extended (maximum total wash time is one minute). The extended wash time allows the booster water temperature to reach set point before the rinse cycle begins.
The tank float also controls the heat for the booster. If the float is down (float switch open), the booster heater circuit will be disabled. If the float is up (float switch closed), the control board will regulate the booster heat as needed.
READY MODE
When a cycle is not in progress, the machine will be maintained in a ready state. In the ready state, tank and booster temperatures are maintained. If water level drops below the tank float in ready mode, tank and booster heating elements are de-energized and a fill cycle will be initiated the next time the chamber door is opened and then closed. An error code [ Ed ] will be displayed indicating the machine has a slow leak. To clear an error from the display, cycle power by turning the machine off then back on.
the default settings. Refer to SERVICE PROGRAMMING for procedures on altering the preprogrammed times of cycle one.
NOTE: Cycle 1's times cannot be adjusted below the NSF minimums.
LUBRICATION
Component |
Lubrication Type |
|
Impeller O - Ring |
P 80® Rubber Lube |
|
|
|
|
Booster Heater Screws |
Never Seez |
|
|
|
|
All NPT Fittings |
Pipe Thread Sealant, |
|
Locktite 565 |
||
|
||
High-Limit Thermostat |
Thermal-Joint Compound |
|
1TAS |
||
|
||
High-Limit Thermostat |
Thermal-Joint Compound |
|
3TAS (Booster Option.) |
||
|
||
|
|
TOOLS
•Standard set of hand tools.
•VOM with A/C current tester (any quality VOM with a sensitivity of at least 20K ohms per volt can be used).
•Anti Static Kit
•Temperature Tester.
•Clamp on type amp meter for meausring heating element current draw.
RUNNING A CYCLE
After the fill cycle is complete, a cycle is initiated by raising and lowering the chamber door.
NOTE: If the chamber door is raised any time during a cycle, the wash pump and rinse solenoid will deenergize. The control will start a new cycle once the chamber door is closed.
CHANGING CYCLE TIME
Changing Cycle Time
Wash cycle duration can be selected at any time whether the machine is at rest or in a cycle. Pressing the CYCLE button will step through the preprogrammed timed cycle selections 1, 2, or 4. The selected cycle time will be retained by the control even when power is removed and turned back on.
Cycle selection 1 is programmable allowing the wash, dwell, rinse, and sani-dwell times to be changed from
Page 5 of 37 |
|
F45576 (1015) |
|
SD3 Series - SERVICE PROCEDURES AND ADJUSTMENTS
SERVICE PROCEDURES AND ADJUSTMENTS
CONTROL BOARD
PROGRAMMING
Certain procedures in
this section require electrical test or measurements while power is applied to the machine. Exercise extreme caution at all times and follow Arc Flash procedures. If test points are not easily accessible, disconnect power and follow Lockout/Tagout procedures, attach test equipment and reapply power to test.
NOTE: The control board is mounted in the machine in such a way that the printing is upside down. The control board will be depicted in the manual as it is found on the machine for consistency purposes.
NOTE: Prior to removing board from machine, check and note the settings of the programmable variables as outlined under SERVICE PROGRAMMING when possible. When unable to access Service Programming, check with establishment manager to determine customer control settings.
NOTE: The replacement control board will come programmed as a different model. Step through this procedure to set up the control board to function as an SD3.
1.Remove FRONT COVER.
2.Open control door.
3.Carefully short the two FACTORY pins of J5 together and press the ON key on switch membrane keypad (user controls on front of machine). Keep short across pins of J5 until display indicates [ 88 ], then remove the short.
A.Display will cycle between [ SET ty ] and [ Sd, fd, GL, AS, HL, or St ].
NOTE: SD3 machine type designation is [ St ].
Fig. 1
4.Program the control board using the information retrieved from the board being replaced and the information found in CONTROL BOARD PROGRAMMING table.
5.Use the SELECT switch on control board to select the feature and the (up arrow) switch to change the feature settings.
Fig. 2
NOTE: The display will alternate between the feature and setting.
6.Press OFF key on switch membrane keypad (user controls on front of machine) to store selections.
7.Program the variables. Refer to SERVICE PROGRAMMING.
8.Close control door.
9.Check machine for proper operation by running one fill cycle and two normal cycles.
F45576 (1015) |
|
Page 6 of 37 |
|
SD3 Series - SERVICE PROCEDURES AND ADJUSTMENTS
CONTROL BOARD PROGRAMMING
Feature Description |
Display |
Setting |
Display |
|
|
|
Standard 1 |
Sd |
|
|
|
Not Applicable in SD3 |
||
|
|
|
||
|
|
|
|
|
|
|
Not Applicable in SD3 |
fd |
|
Machine Type |
ty |
|
|
|
Not Applicable in SD3 |
GL |
|||
|
|
Not Applicable in SD3 |
AS |
|
|
|
|
|
|
|
|
Not Applicable in SD3 |
HL |
|
|
|
|
|
|
|
|
SD3 |
St |
|
|
|
Hot SD3 with Booster |
H |
|
|
|
|
|
|
ID |
Id |
Chemical |
C |
|
|
|
|
|
|
|
|
Plain SD3 No Booster |
P |
|
Rinse Assurance |
tc |
Yes2 |
yE |
|
No |
no |
|||
|
|
|||
|
|
|
|
|
Manual Temperature Control |
tr |
These parameters are not available for SD3. If either one of |
||
Flow Options |
FL |
these are displayed, return to MachineType and select [ St ]. |
||
|
|
|
|
|
Diagnostics override |
dG |
Show Error Codes2 |
1 |
|
|
|
Disable Error Codes |
2 |
|
|
|
|
|
|
Shorted water thermistor |
SP |
These parameters are not available for SD3. If either one of |
||
detections |
these are displayed, return to MachineType and select [ St ]. |
|||
|
||||
1 Default setting.
2 This feature is not available on SD3 - Plain or Chemical models.
SERVICE PROGRAMMING
Certain procedures in
this section require electrical test or measurements while power is applied to the machine. Exercise extreme caution at all times and follow Arc Flash procedures. If test points are not easily accessible, disconnect power and follow Lockout/Tagout procedures, attach test equipment and reapply power to test.
Page 7 of 37 |
|
F45576 (1015) |
|
SD3 Series - SERVICE PROCEDURES AND ADJUSTMENTS
NOTE: Service programming mode can be accessed by two methods.
Entering Programming Mode When Machine is OFF
1.Remove front cover.
2.Open control door.
3.Press and hold the PROG switch on the control board, then press the ON key on the switch membrane keypad (user controls on front of machine) to enter programming mode.
A. Release PROG switch when display shows [ 88 ].
Entering Programming Mode When Machine is ON (Tank Temperature Displayed and Fill Cycle is Complete)
1.Remove FRONT COVER.
2.Open control door.
3.Press and hold the PROG switch on the control board, then press the CYCLE key on the switch membrane keypad (user controls on front of machine) to enter programming mode.
A. Release PROG switch when display shows [ 88 ].
Programming Mode
NOTE: Refer to SERVICE PROGRAMMING CHART.
1.Change each function setting by pressing the (up arrow) switch on board until correct value is entered.
2.Press the SELECT switch on the board to enter next function.
NOTE: Pressing the OFF key on display keypad at any time during programming will store your selections.
Fig. 3
3.To exit service programming and store your selections do one of the following:
A.Press OFF key (machine will shut down).
B.Press PROG switch (machine will stay on with tank temperature being displayed).
C.Close control door.
D.Check for proper operation by running one fill cycle and two normal cycles.
F45576 (1015) |
|
Page 8 of 37 |
|
SD3 Series - SERVICE PROCEDURES AND ADJUSTMENTS
SERVICE PROGRAMMING CHART
PARAMETER |
|
DISPLAY |
PROGRAMMING |
DEFAULT |
|
ICONS |
|
NUMERIC VALUE |
VARIABLES |
||
|
|
|
|||
|
|
|
|
Chemical Models: |
130°F |
|
SET |
|
Programmed |
120-150°F |
|
Tank Temperature |
|
|
|||
WASH |
|
Temperature |
Hot Models: 150-170°F |
158°F |
|
|
|
||||
|
|
|
|
Plain Models: 150-170°F |
158°F |
Booster Temperature (Hot |
SET |
|
Programmed |
180 - 195°F (Hot Models |
186°F |
Machines Only |
RINSE |
|
Temperature |
Only) |
|
|
|
||||
|
|
|
|
|
|
Cycle 1 Wash Time |
SET |
|
Programmed Wash |
38 - 99 seconds |
38 sec. |
WASH |
|
Time |
|||
|
|
|
|
||
|
|
|
|
|
|
|
|
|
[1dt] Alternating with |
|
|
Dwell Time (all cycles) |
SET |
|
Programmed Dwell |
2 - 15 seconds |
2 sec. |
|
|
|
Time |
|
|
Rinse Time (all cycles) |
SET |
|
Programmed Rinse |
10 - 15 seconds |
10 sec. |
RINSE |
|
Time |
|||
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
SD3 -H and -P |
7 sec. |
|
|
|
[dt] Alternating with |
7 - 15 seconds |
|
|
|
|
|
||
Sani-dwell Time (all cycles) |
SET |
|
Programmed Sani- |
SD3 - C |
|
|
|
|
Dwell Time |
dE = disabled; 1 - 15 |
dE |
|
|
|
|
||
|
|
|
|
seconds |
|
°F or °C |
SET |
|
No Numeric Display |
°F,° C |
°F |
Display |
°F or °C |
|
|||
|
|
|
|
||
|
|
|
|
|
|
Idle Shut Down Time |
SET |
|
[IdL] Alternating with |
dE = 0 = disabled; 0 - 12 |
6 |
IdL |
|
Programmed Shut |
(hours) |
||
|
|
Down Time in Hours |
|
||
Empty Water Level Detection 1 |
SET |
|
Present Sensitivity |
20 - 80 |
60 |
|
Setting |
||||
|
|
|
|
|
|
Clean Float Setting 1 |
SET |
|
Present Sensitivity |
0 - 18 |
15 |
|
Setting or [dE] |
||||
|
|
|
|
|
|
1 Although parameter is adjustable, this setting has no affect on the float switch circuit of SD3 machines.
Page 9 of 37 |
|
F45576 (1015) |
|
SD3 Series - SERVICE PROCEDURES AND ADJUSTMENTS
TANK HEATER - TEST
Certain procedures in
this section require electrical test or measurements while power is applied to the machine. Exercise extreme caution at all times and follow Arc Flash procedures. If test points are not easily accessible, disconnect power and follow Lockout/Tagout procedures, attach test equipment and reapply power to test.
NOTE: Tank must be filled with water (float switch closed) in order to test tank heat circuit.
1.Remove FRONT COVER.
2.Open control door.
3.Apply power to machine.
A.Measure incoming voltage across line side of the tank contactor 2CON and verify it matches machine specifications on data plate.
4.Verify the following conditions are met.
A.Tank is full of water.
B.Float switch 1FS is closed.
C.Wash tank thermistor 1QTM is good, not open or shorted.
D.There is a demand for heat (tank water temperature is below set point).
5.Turn machine on.
Shorting J8 terminals together without
having water in the tank may result in damaging the tank heater.
A.If temperature control circuit is not calling for heat (relay board TANK HEAT LED not lit), run machine through a cycle to activate tank heater. Alternately, short the relay board TANK HEAT (AM) -J8 pins together to energize the tank heater.
Fig. 4
6.While the TANK HEAT (AM) LED is on, verify that the tank heat contactor 2CON is energized.
A.If contactor is not energized, check for 120VAC across coil.
1)If 120VAC is not present, check high limit thermostat 1TAS.
B.If contactor is energized, check:
1)Voltage across all legs on load side of contactor.
2)Current flow through all elements of heater.
RATED TANK HEATER ELEMENT CURRENTS
Voltage/Phase |
Amperes |
Power (Watts) |
208/60/1 |
26A |
5.4kW |
240/60/1 |
30A |
7.2kW |
|
|
|
208/60/3 |
15A |
5.4kW |
|
|
|
240/60/3 |
17.3A |
7.2kW |
480/60/3 |
6A |
5kW |
|
|
|
7.If the current reading on any of the elements is not correct:
A.Check the contacts of contactor 2CON.
B.Check the wash tank heater element resistance.
INDIVIDUAL TANK ELEMENT RESISTANCE
Voltage |
Cold Resistance |
208 - 240V |
21.7 - 25.1Ω |
|
|
480V |
105 - 121.7Ω |
F45576 (1015) |
|
Page 10 of 37 |
|
SD3 Series - SERVICE PROCEDURES AND ADJUSTMENTS
BOOSTER HEATER - TEST
Certain procedures in
this section require electrical test or measurements while power is applied to the machine. Exercise extreme caution at all times and follow Arc Flash procedures. If test points are not easily accessible, disconnect power and follow Lockout/Tagout procedures, attach test equipment and reapply power to test.
NOTE: Tank must be filled with water (float switch closed) in order to test booster heat circuit.
1.Measure incoming voltage and verify it matches machine specifications.
2.Remove FRONT COVER.
3.Open control door.
4.Apply power to machine and booster.
A.Measure incoming voltage across line side of the tank contactor 2CON and booster contactor 3CON. Verify voltages match machine specifications on data plate.
5.Verify the following conditions are met.
A.Tank is full of water.
B.Float switch 1FS is closed.
C.Booster thermistor 3QTM is good, not open or shorted.
D.There is a demand for heat (booster water temperature is below set point).
6.Turn machine on.
Shorting J9 terminals together without
having water in the tank may result in damaging the tank heater.
A.If temperature control circuit is not calling for heat (relay board BOOSTER LED not lit), run machine through a cycle to activate booster heater. Alternately, short the relay board pins BOOSTER - J9 together to energize the booster heater.
Fig. 5
7.While the BOOSTER LED is on, verify that the booster contactor 3CON is energized.
A.If contactor is not energized, check for 120VAC across coil.
1)If 120VAC is not present, check high limit thermostats 2TAS and 3TAS.
B.If contactor is energized, check:
1)Voltage across all legs on load side of contactor.
2)Current flow through all elements of heater.
BOOSTER HEATER ELEMENT CURRENTS
Voltage/Phase |
Amperes |
Power (Watts) |
200/60/1 |
45.1A |
9kW |
|
|
|
208/60/1 |
40.7A |
9.8kW |
240/60/1 |
54.2A |
13kW |
|
|
|
200/60/3 |
26A |
9kW |
|
|
|
208/60/3 |
27.2A |
9.8kW |
240/60/3 |
31.3A |
13kW |
|
|
|
480/60/3 |
13.6A |
13kW |
|
|
|
8.If the current reading on any of the elements is not correct:
A.Check the contacts of contactor 3CON.
B.Check the booster heater element resistance.
INDIVIDUAL ELEMENT RESISTANCE
Voltage |
Cold Resistance |
200 - 208V |
9.0 - 10.5Ω |
|
|
220 - 240V |
12 - 13.9Ω |
380 - 415 |
30.2 - 34.9Ω |
|
|
440 - 480V |
48.2 - 55.7Ω |
|
|
Page 11 of 37 |
|
F45576 (1015) |
|
SD3 Series - SERVICE PROCEDURES AND ADJUSTMENTS
INDIVIDUAL ELEMENT RESISTANCE
Voltage |
Cold Resistance |
575 - 600V |
75.3 - 87.0Ω |
|
|
PUMP MOTOR - TEST
Certain procedures in
this section require electrical test or measurements while power is applied to the machine. Exercise extreme caution at all times and follow Arc Flash procedures. If test points are not easily accessible, disconnect power and follow Lockout/Tagout procedures, attach test equipment and reapply power to test.
NOTE: The pump motor for all machines is rated at 2 H.P. and has thermal overload protection.
1.Remove FRONT COVER.
2.Open control door.
3.Apply power and measure incoming voltage verifying it meets machine requirements.
4.Turn machine on and take an amperage reading of one of the tank heater leads connected to contactor (2CON).
SD3 MOTOR CURRENTS (Maximum)
Voltage/phase |
Amps |
208/60/1 |
11.0A |
240/60/1 |
10.6A |
|
|
208/60/3 |
5.6A |
|
|
240/60/3 |
5.4A |
480/60/3 |
2.7A |
|
|
NOTE: Current consumption for a normally operating pump and motor assembly will be less than the amperage values listed.
5.If motor current exceeds those values listed in the table, inspect pump for blockage causing a locked-rotor condition.
A. If blockage is not present, replace motor.
6.If current in one phase of a three phase motor is low or missing, also inspect incoming line service, contactor 1CON and other related circuitry to missing phase.
THERMISTOR - TEST 1QTM, 2QTM & 3QTM
Certain procedures in
this section require electrical test or measurements while power is applied to the machine. Exercise extreme caution at all times and follow Arc Flash procedures. If test points are not easily accessible, disconnect power and follow Lockout/Tagout procedures, attach test equipment and reapply power to test.
NOTE: The temperature/resistance characteristics are the same for all the thermistors used in SD3.
NOTE: The resistance of each thermistor can be measured by removing the plug connected to J2 on the control board.
1.Remove FRONT COVER.
2.Open control door.
Quick Check Using Service Diagnostics
1.Enter Service Diagnostics mode.
A.Apply power. With machine off, press and hold the PROG and SELECT switches on control board and press and release the ON key on the switch membrane keypad.
B.Continue to hold in on the PROG and SELECT switches until display shows [ 88 ] then release both switches.
NOTE: XXX represents the actual water temperature.
C.Press the SELECT switch repeatedly until [ WASH XXX°F (°C) ] which is tank water temperature.
D.Press the SELECT switch once to display [ XXX°F (°C) RINSE ] which is rinse water temperature.
E.Press the SELECT switch once to display [ WASH XXX°F (°C) RINSE ] which is booster water temperature.
Measuring Thermistor Resistance
1.Disconnect the plug from J2 on the control board.
F45576 (1015) |
|
Page 12 of 37 |
|
SD3 Series - SERVICE PROCEDURES AND ADJUSTMENTS
Fig. 6
2.Refer to the following photograph to locate the thermistor leads of interest.
Fig. 7
PINS FOR THERMISTORS AND FLOAT SWITCH
3.Refer to the table that follows for thermistor resistance values.
TEMPERATURE VS. RESISTANCE FOR 1QTM,
2QTM AND 3QTM THERMISTORS
DEGREE (°F) |
RESISTANCE (Ω) |
70°F |
120 kΩ |
|
|
80°F |
91 kΩ |
90°F |
72 kΩ |
|
|
100°F |
55 kΩ |
|
|
110°F |
44 kΩ |
120°F |
34.5 kΩ |
|
|
130°F |
28 kΩ |
|
|
140°F |
22.5 kΩ |
150°F |
18 kΩ |
|
|
160°F |
14.5 kΩ |
|
|
170°F |
12 kΩ |
180°F |
10 kΩ |
|
|
TEMPERATURE VS. RESISTANCE FOR 1QTM,
2QTM AND 3QTM THERMISTORS
DEGREE (°F) |
RESISTANCE (Ω) |
190°F |
8.2 kΩ |
200°F |
6.9 kΩ |
|
|
210°F |
5.8 kΩ |
|
|
250°F |
2.9 kΩ |
257°F |
2.626 kΩ |
|
|
284°F |
1.734 kΩ |
|
|
290°F |
1.6 kΩ |
|
|
TRANSFORMER 1T - TEST
Certain procedures in
this section require electrical test or measurements while power is applied to the machine. Exercise extreme caution at all times and follow Arc Flash procedures. If test points are not easily accessible, disconnect power and follow Lockout/Tagout procedures, attach test equipment and reapply power to test.
NOTE: Transformer 1T steps down incoming line voltage to 120VAC for use by the machine's control components.
1.Remove FRONT COVER.
2.Open control door.
3.Remove right side cover.
4.Verify transformer is strapped correctly by comparing connection wiring points on transformer with machine data plate.
Fig. 8
Page 13 of 37 |
|
F45576 (1015) |
|
SD3 Series - SERVICE PROCEDURES AND ADJUSTMENTS
5.Connect power to machine.
6.Verify incoming AC line voltage at the line service connection point.
7.Verify incoming voltage is present to primary side of transformer 1T.
8.Measure output AC voltage across secondary windings of transformer. Voltage should be approximately 120VAC.
A.If voltage is present, transformer is functioning.
B.If output voltage is not present, verify transformer wiring connections.
1)If connections are correct, replace transformer.
C.If output voltage is low, disconnect power from machine.
1)Disconnect one side of the secondary.
2)Apply power to machine.
3)Check output voltage across secondary windings.
a.If voltage is still low, replace transformer.
b.If voltage is approximately 120VAC, check components and related wiring connected to the secondary.
TRANSFORMER 2T - TEST
Certain procedures in
this section require electrical test or measurements while power is applied to the machine. Exercise extreme caution at all times and follow Arc Flash procedures. If test points are not easily accessible, disconnect power and follow Lockout/Tagout procedures, attach test equipment and reapply power to test.
1.Remove FRONT COVER.
2.Open control door.
3.Remove right side cover.
4.Connect power to machine.
5.Verify incoming 120VAC voltage is present to primary side of transformer 2T.
Fig. 9
A.If 120VAC is not present, check fuse F2 on relay board.
1)If fuse is good, perform TRANSFORMER 1T - TEST.
6.Measure output AC voltage across secondary windings of transformer. Voltage should range between (11.5 - 16VAC).
Fig. 10
A.If voltage is present at output, transformer is functioning.
B.If voltage is not present at output, verify transformer wiring connections.
1)If connections are correct, replace transformer.
C.If voltage is low, disconnect power from machine.
1)Disconnect one side of the secondary.
2)Apply power to machine.
3)Check voltage across secondary windings.
F45576 (1015) |
|
Page 14 of 37 |
|
SD3 Series - SERVICE PROCEDURES AND ADJUSTMENTS
a.If voltage at output is still low, replace transformer.
b.If voltage at output is between 11.5 - 16VAC, check the control board assembly.
DELIMIMG PROCEDURE
DELIMING SOLUTION, RINSE
AGENTS, OR ANY OTHER KIND OF ACID MUST NOT COME IN CONTACT WITH BLEACH OR RINSE SOLUTION CONTAINING BLEACH USED IN CHEMICAL SANITIZING MACHINES. MIXING MAY CAUSE HAZARDOUS GAS TO FORM. THIS ENTIRE PROCEDURE MUST BE FOLLOWED STEP-BY-STEP FOR SAFE AND SATISFACTORY RESULTS.
1.Remove rack, drain tank, press "OFF".
2.Press and hold "Cycle & "ON for three seconds.
3.Open door & add delime agent per supplier instructions for 14 gallon tank.
4.Close door, pump starts & display flashes “DELIME”. After 12 minutes display scrolls “DRAIN ”.
5.Check interior, close door to run additional cycles if necessary.
6.Drain tank, turn unit off.
NOTE: The delime counter feature is disabled from the factory.
DOOR TENSION ADJUSTMENT
NOTE: Door is adjusted correctly if the door remains in place at any position.
1.Loosen lock nut.
3.Lock adjusting nut in position with lower nut.
Fig. 11
2.Holding the spring rod in position to prevent rotation, adjust the nut to provide proper tension.
Page 15 of 37 |
|
F45576 (1015) |
|
|
|
SD3 Series - ELECTRICAL OPERATION |
|
||
|
|
ELECTRICAL OPERATION |
|||
|
|
|
|
|
|
|
|
COMPONENT FUNCTION |
|
||
Control Board |
Controls dishwasher electrical operation. |
|
|||
Assembly . . . . . . . . . . . . . |
|
|
|
|
|
Relay Board . . . . . . . . . . |
Controlled by control board assembly, the on board relays and fuses deliver energy to |
||||
|
machine control components. |
||||
Fuse, Relay Board |
1/10A fuse. Protects rinse feeder 1CR coil circuit. |
||||
(F1) . . . . . . . . . . . . . . . . . . . |
|
|
|
|
|
Fuse, Relay Board |
1.0A fuse. Protects primary of transformer 2T, 1CON, 2CON, 3CON, 1SOL and external |
||||
(F2) . . . . . . . . . . . . . . . . . . . |
booster control from over-currents. |
||||
Switch Membrane |
User interface to machine. Used to select wash mode and program control board |
||||
Keypad . . . . . . . . . . . . . . . |
assembly. |
||||
Display Module . . . . . . . |
Provides machine information to user through the use of LEDs, lighted icons, and |
||||
|
illuminated text and numbers. |
||||
Contactor (1CON) . . . . . |
Controls electrical power to wash pump (120VAC coil). |
||||
Contactor (2CON) . . . . . |
Controls electrical power to wash tank heater (120VAC coil). |
||||
Contactor (3CON) . . . . . |
Controls electrical power to booster heater (120VAC coil). |
||||
Relay (1CR) . . . . . . . . . . . |
Controlled by the control board assembly through the relay board, provides a means of |
||||
|
controlling energy to RPS1 and RPS2 on terminal block 3TB. |
||||
Float Switch (1FS) . . . . |
Detects water level in tank. On SD3, control board only uses Low Water Level LED with |
||||
|
the float switch. |
||||
Heater, Booster (BSTR |
Heating element for booster (8.5kW). |
||||
HTR) . . . . . . . . . . . . . . . . . . |
|
|
|
|
|
Heater, Tank (Tank |
Heating element for wash tank (5kW to 7.2kW). |
||||
HTR) . . . . . . . . . . . . . . . . . . |
|
|
|
|
|
High Limit Thermostat |
Protects tank heater circuit. |
||||
(1TAS) . . . . . . . . . . . . . . . . |
|
|
|
|
|
High Limit Thermostat |
Protects booster circuit. Frame mounted, capillary design |
||||
(2TAS) . . . . . . . . . . . . . . . . |
|
|
|
|
|
High Limit Thermostat |
Protects booster circuit. Mounted on the booster. |
||||
(3TAS) . . . . . . . . . . . . . . . . |
|
|
|
|
|
Interlock Switch |
Feed back to control board on state of door (open or closed). |
||||
(1LS) . . . . . . . . . . . . . . . . . . |
|
|
|
|
|
Solenoid (1SOL) . . . . . . |
Fill/rinse solenoid. |
||||
Thermistor, Wash |
Senses tank water temperature. |
||||
(1QTM) . . . . . . . . . . . . . . . . |
|
|
|
|
|
Thermistor, Rinse |
Senses rinse water temperature |
||||
(2QTM) . . . . . . . . . . . . . . . . |
|
|
|
|
|
Thermistor, Booster |
Senses booster water temperature |
||||
(3QTM) . . . . . . . . . . . . . . . . |
|
|
|
|
|
Terminal Block |
Line service to tank contactor 2CON (1 phase only). |
||||
(1TB) . . . . . . . . . . . . . . . . . . |
|
|
|
|
|
F45576 (1015) |
|
|
Page 16 of 37 |
|
|
|
|
|
|||
|
SD3 Series - ELECTRICAL OPERATION |
Terminal Block |
Line service to booster contactor 3CON (1 phase only). |
(2TB) . . . . . . . . . . . . . . . . . . |
|
Terminal Block |
Connection point for detergent and rinse aid control devices. |
(3TB) . . . . . . . . . . . . . . . . . . |
|
Transformer (1T) . . . . . |
Provides 120VAC to control circuit and 2T. |
Transformer (2T) . . . . . |
Provides 12VAC to control board. |
COMPONENT LOCATION
Control Door Mounted Components
NOTE: The components present are determined by the voltage, hertz, phase, and options on the dishwasher.
Control Panel Mounted Components
Page 17 of 37 |
|
F45576 (1015) |
|
SD3 Series - ELECTRICAL OPERATION
CONTROL BOARD / RELAY BOARD LAYOUT
Control Board
F45576 (1015) |
|
Page 18 of 37 |
|
SD3 Series - ELECTRICAL OPERATION
Relay Board NOTE: DETERGENT AND RINSE AID CIRCUITS 1. NOT USED ON SD3.
SEQUENCE OF OPERATION
Refer to the correct wiring diagram for model being serviced when reviewing sequence of operation.
WIRING DIAGRAM - 3 PHASE
WIRING DIAGRAM - 1 PHASE
Initial Conditions
•Door up (Door Interlock 1LS open).
•Dishwasher tank empty (Float 1FS open).
•Water supply requirements (110°F @ 20 ± 5 psi) to machine are satisfied.
•Voltage supplied to machine is correct.
•High limits are closed.
Page 19 of 37
Machine is off. Display is not lit.
A.Line voltage present at the following components.
1)Primary windings of transformer 1T.
2)Line sides of 1CON (pump motor) and 2CON (tank heater).
3)Booster heater line side of 3CON.
4)Relay terminals 1CR 4 and 8.
B.120VAC from transformer 1T present at the following components.
1)Triac Q2 (1CR coil) thru fuse F1.
2)Primary windings of transformer 2T thru fuse F2.
3)Triac Q3 (3CON coil) thru fuse F2.
4)Triac Q4 (1SOL) thru fuse F2.
F45576 (1015)
SD3 Series - ELECTRICAL OPERATION
5)Relay board relays K5-C, K8-C and K9- C thru fuse F2.
NOTE: It is normal for the secondary voltage (output) from transformer 2T to range between 11.5 to 16VAC.
C.12VAC present to control board J1-1/3 from secondary windings of transformer 2T. Acceptable voltage is 11.5 - 16VAC.
1)Power supply on control board converts AC voltage to 12VDC and 5VDC to power control board, display and membrane switch.
2.ON key on membrane switch is pressed.
A.Control board enters self-test, also tests display LEDs.
B.K5 coil on relay board energize.
1)EXT BSTR & VFC (AM) LED on relay board turns on.
3.Self-test completes.
A.Machine type (AP, AH or AC) is displayed followed by tank temperature.
B.MICRO LED on control board blinks at a 1 second on - 1 second off rate.
C.5VDC present across 1QTM, 2QTM, 3QTM and open contacts of 1FS.
D.Tank temperature is displayed.
E.Membrane switch - last selected cycle LED is on. Cycle selection is enabled.
4.Door is shut.
A.Door interlock switch 1LS closes.
B.Control board senses float switch is open and energizes fill/rinse solenoid 1SOL through relay board. Tank begins to fill.
1)FILL LED on relay board turns on.
C.FILL icon and tank temperature are displayed on display board.
NOTE: Once tank float switch is closed, a wash cycle can be started by opening and closing the door even though fill is not complete.
D.Tank float 1FS closes.
1)LOW LEVEL WATER LED on control board turns on.
2)Control board energizes 3CON coil through the relay board. 3CON contacts close energizing booster heater.
a.BOOSTER LED on relay board turns on.
3)Control board signals relay board (relay K9) to energize 2CON coil. 2CON contacts close energizing tank heater.
a.TANK HEAT (AM) LED on relay board turns on.
5.Depending on the fill time required to close float switch 1FS, the control board will fill an additional amount of time (75 - 120 seconds) after which time the control board de-energizes the fill/rinse solenoid 1SOL through the relay board.
A. FILL LED on relay board turns off.
NOTE: Tank Heat and Booster circuits remain energized until set point has been reached; however, a wash cycle may be started at any point.
6.Booster temperature reaches set-point.
A.Control board de-energizes 3CON coil through the relay board. 3CON contacts open de-energizing booster heater.
1)BOOSTER LED on relay board turns off.
7.Tank temperature reaches set-point.
A.Control board de-energizes 2CON coil through the relay board. 2CON contacts open de-energizing tank heater.
1)TANK HEAT (AM) LED on relay board turns off.
8.Door is opened and closed.
A.Control board senses that float switch 1FS was closed before the door was closed and energizes relay K8 on relay board. 1CON contacts close energizing the pump motor MTR. A wash cycle begins.
1)WASH LED on relay board turns on.
2)Machine line voltage present at terminals DPS1 and DPS2.
9.Wash cycle.
A.The WASH icon and water temperature are displayed.
B.Wash cycle continues for time selected.
C.Wash cycle completed.
1)Relay board K8 de-energizes. Wash coil (1CON) de-energizes and pump N.O. contacts open. Pump stops.
F45576 (1015) |
|
Page 20 of 37 |
|
SD3 Series - ELECTRICAL OPERATION
a.WASH LED on relay board turns off.
2)Dishwasher enters a dwell cycle. Default is two seconds.
3)Machine line voltage removed from terminals DPS1 and DPS2.
D.Rinse cycle begins.
1)Control board energizes the fill/rinse solenoid (1SOL) through the relay board.
a.FILL LED on relay board turns on.
2)Control board energizes the rinse feeder relay coil (1CR) through the relay board. Relay 1CR N.O. contacts 4/2 and 8/6 operate (close).
3)The RINSE icon and final rinse temperature are displayed.
4)Machine line voltage present at terminals RPS1 and RPS2.
5)Rinse cycle continues for the programmed time. Default is 10 seconds.
E.Rinse cycle completed.
1)Control board enters seven second sani-dwell. RINSE icon is displayed until sani-dwell cycle is complete.
2)Control board de-energizes the rinse feeder 1CR through the relay board. Relay 1CR de-energizes and 1CR N.O. contacts 4/2 and 8/6 open.
3)Control board de-energizes the fill/ rinse solenoid 1SOL through the relay board. Rinsing stops.
a. FILL LED on relay board turns off.
4)Machine line voltage removed from terminals RPS1 and RPS2.
5)Tank temperature is displayed.
10.Tank Heat and Booster temperatures continue to be monitored and maintained by the control board through the relay board.
|
CONTROL and RELAY BOARD LEDs |
|
|
|
|
|
|
CONTROL BOARD LEDs |
CONTROL BOARD |
|
DESCRIPTION |
DOOR |
|
On when door interlock 1LS is closed. |
|
|
|
MICRO |
|
Flashes at a rate of 1sec on, 1 sec off when machine is on. |
|
|
|
|
|
LOW - On when float switch 1FS is closed. |
|
|
|
WATER LEVEL |
|
MID - Not used with SD3. |
|
|
|
|
|
HIGH - Not used with SD3 |
|
|
|
RS485 |
|
Used with NAFEM Gateway. |
|
|
|
|
|
|
|
|
RELAY BOARD LEDs |
RELAY BOARD |
|
DESCRIPTION |
BOOSTER |
|
On when triac Q3 (booster circuit) is gated on. |
|
Booster heat on. |
|
|
|
|
|
|
|
FILL |
|
On when triac Q4 (fill circuit) is gated on. 1SOL on. |
TANK HEAT AM |
|
On when K9 is energized. Tank heat on. |
|
|
|
EXT BSTR & VFC |
|
On when machine is on. |
|
|
|
WASH |
|
On when K8 is energized. Pump motor on. |
RINSE AID |
|
On when triac Q2 (rinse feeder) is gated on. 1CR is energized. |
|
|
|
Page 21 of 37 |
|
F45576 (1015) |
|
|
SD3 Series - ELECTRICAL OPERATION |
|
|
|
|
|
|
RELAY BOARD LEDs |
RELAY BOARD |
|
DESCRIPTION |
DETERGENT |
|
LEDs present on service replacement relay boards, but not used on SD3 |
SANITIZER |
|
machines. |
F45576 (1015) |
|
Page 22 of 37 |
|
Loading...