SP8026-1909
EVOLUTION ELECTRIC STEAMER
21
REF
LETTER
POSSIBLE CAUSE TROUBLESHOOTING STEPS
K
Chamber Pressure Switch
FIG 3.1H
Switch is normally closed.
Disconnect wires from common and normally
closed.
Check for 24VDC between the wires. If there is
not voltage see Control Board for further testing.
If voltage is present, test for continuity across the
common and normally closed terminals.
If there is no continuity, open the door of the
steamer.
If there is still no continuity, replace pressure
switch.
If there is continuity, the steam vent requires
cleaning.
Main Control Board Unplug unit.
With unit unplugged - remove red wire from
Terminal #J7-1 and the Orange wire from #J7-2.
Restore power to the unit. Carefully test for
24VDC accross between the Terminals on the
board. If there is no voltage, replace Main control
board.
If voltage is present, see below.
Door Switch
(switch is located behind
magnetic door plate, could be
left or right of steamer based on
how the unit is hinged).
Perform following test:
Unplug unit.
Reattached Orange wire to #J7-2.
Using a jumper wire - connect Terminal #J7-1 to
the common on the pressure switch.
Resupply power to unit
If starts to heat - replace door switch.
Solid State Relay Check for 24-30 VAC on pins A1 & A2 of each
Solid State Relay. (Green LED should be lit.)
Ensure that Relay Contacts are closing when
receiving the 24-30 VAC from the Control/Keypad
Board.
Check that proper line voltage is being passed
through the Solid State Relay to the Heating
Elements.
Contactor Check that the Contactor is not open, preventing
the line voltage to the Solid State Relay(s)
Cast Heater Check that the correct Amps (based on KiloWatts
of unit) are being drawn from each Element.
Ensure that all the required voltages (based on
required phase needs of the unit) are present to
each Element.
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