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
SD3 Series - SERVICE PROCEDURES AND ADJUSTMENTS
F45576 (1015)
Page 10 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 ...
