mr. steam MS-150T, Installation, Operation & Maintenance Manual, Page: 17 / 32

mr
.
steam steambaths
®
Installation, Operation & Maintenance Manual
16
Liquid Level Control Board - Explaination of LED Indicators
With TEMPO or TEMPO/PLUS control OFF
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Dry Water level indicator–LED is ON when no water is detected (for more that 5 seconds). OFF when
water level is satisfactory. For units with AutoFlush, if more that two hours have elapsed since
last usage and this LED is OFF it is indicative of an autoflush or water level probe circuit malfunction.
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75 Min LED is ON when 75-minute time out feature is active.
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5V +5 VDC indicator –LED is ON when there is 208/240 Volt incoming power connected,
24 Volt transformer secondary output and on-board 5 Volt DC control power are present.
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With TEMPO or TEMPO/PLUS control ON
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HTR Room temperature status indicator–LED is ON when control is calling for heat,
OFF when temperature is satisfied or PAUSE button is engaged.
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RLY Water feed solenoid relay indicator–LED is ON when relay is closed and sending 24 Volts
WTR to the water feed solenoid valve coil, OFF when water level is satisfied and relay is open.
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RLY AutoFlush relay indicator–LED is ON when relay is closed an sending 24 Volts to AutoFlush
FLUSH valve motor (closing valve).
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RLY Contactor relay indicator–LED is ON when relay is closed and sending 24 Volts to the
HTR contactor coil. (This LED comes ON after LED's ”DRY” & “RLY HTR” go OFF.)
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Liquid Level Control Board PN 103899
(shown without wiring)
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Enlarged Detail
of LED Indicators
TA
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IN
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