CONTROL BOARD AND RELAY
BOARD
On dishwashers equipped with the
optional booster, the heat circuit is enabled when tank
float switch is closed. Do not operate machine with
dishwasher tank full of water and booster tank empty.
NOTE:
The SD3 dishwasher uses the same control
board assembly as some other models. The control
board must be programmed as an SD3 for the
machine to function properly. Most SD3 related
problems can be found quickly by using the on-board
LEDs as a diagnostic tool.
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.
Operating Conditions
•
Refer to the proper wiring diagram for the model
being serviced.
•
Power is present to machine. The control board
is configured to the machine data plate to operate
as an SD Hot (H) or Plain (P) machine.
•
Correct water supply to machine, turned on and
at correct pressure (20 psi ± 5 psi).
•
Control board is properly grounded.
No Display After ON Key is Pressed
1.
Press the ON key on switch membrane keypad.
A.
If display does not turn on, but all Cycle
LEDS on keypad are lit for a brief time, then
one of the Cycle LEDs remains lit, check the
display board.
B.
If there is no action on display and keypad.
Verify:
1)
Switch membrane keypad is plugged
into control board (two connectors).
2)
Display board is plugged into control
board.
3)
Fuse F2 on relay board is good.
4)
Input voltage to control board is
present (11.5 - 16VAC) across 1PL 1/3.
Fig. 18
a.
If voltage is not present, check
transformer 2T.
5)
VUNREG on control board has voltage
present (14 - 19VDC).
Fig. 19
a.
If voltage is not present, verify that
the connector is connected
correctly to J1 on control board. If
it is correct, replace control board.
6)
5VDC at keypad connector J4-4.
Fig. 20
SD3 Series - TROUBLESHOOTING
F45576 (1015)
Page 28 of 37
Summary of Contents for SD3 Series
Page 1: ...SD3 Series SD3 ML 130232 SERVICE and PARTS MANUAL F45576 1015 ...
Page 23: ...WIRING DIAGRAM 1 PHASE Fig 16 SD3 Series ELECTRICAL OPERATION Page 23 of 37 F45576 1015 ...
Page 24: ...WIRING DIAGRAM 3 PHASE Fig 17 SD3 Series ELECTRICAL OPERATION F45576 1015 Page 24 of 37 ...
Page 39: ...SD3 DISHWASHER REPLACEMENT PARTS F 43302 Rev B October 2015 2 2015 ...
Page 41: ...CONTROLS SD3 DISHWASHER REPLACEMENT PARTS F 43302 Rev B October 2015 4 ...
Page 43: ...CONTROL CABLES SD3 DISHWASHER REPLACEMENT PARTS F 43302 Rev B October 2015 6 ...
Page 45: ...CONTROL BOX SD3 DISHWASHER REPLACEMENT PARTS F 43302 Rev B October 2015 8 ...
Page 47: ...MOTOR AND PUMP SD3 DISHWASHER REPLACEMENT PARTS F 43302 Rev B October 2015 10 ...
Page 49: ...UPPER WASH ARM SD3 DISHWASHER REPLACEMENT PARTS F 43302 Rev B October 2015 12 ...
Page 51: ...LOWER WASH ARM SD3 DISHWASHER REPLACEMENT PARTS F 43302 Rev B October 2015 14 ...
Page 53: ...RINSE PIPING WITHOUT BOOSTER SD3 DISHWASHER REPLACEMENT PARTS F 43302 Rev B October 2015 16 ...
Page 55: ...RINSE PIPING WITH BOOSTER SD3 DISHWASHER REPLACEMENT PARTS F 43302 Rev B October 2015 18 ...
Page 57: ...BOOSTER PIPING SD3 DISHWASHER REPLACEMENT PARTS F 43302 Rev B October 2015 20 ...
Page 59: ...ELECTRIC BOOSTER TANK SD3 DISHWASHER REPLACEMENT PARTS F 43302 Rev B October 2015 22 ...
Page 63: ...DRAIN UNIT SD3 DISHWASHER REPLACEMENT PARTS F 43302 Rev B October 2015 26 ...
Page 67: ...DOOR ASSEMBLY SD3 DISHWASHER REPLACEMENT PARTS F 43302 Rev B October 2015 30 ...
Page 69: ...PANELS AND RACK SUPPORT SD3 DISHWASHER REPLACEMENT PARTS F 43302 Rev B October 2015 32 ...
Page 71: ...SD3 DISHWASHER REPLACEMENT PARTS FORM 43302 Rev B OCTOBER 2015 PRINTED IN U S A ...
