S – 150 Controller User Manual
MKTF – 429-A 18 08/16
Operating Hours
The current operating hours are shown on the bottom line.
Temperature
The current water temperature is shown on the bottom line after the operating hours. When the unit is
offline because of a shutdown condition, the reading is replaced with ‘–––’.
Warning Messages
Warning messages are also shown on the second line. If any warnings are active, the active warnings
will alternate with the normal displays for the bottom line. The following lists the warning messages.
HI TDS / Conductivity: The TDS / Conductivity reading has exceeded the programmed limit.
TANK LOW: The tank low input is active.
TANK LOW 99: The tank low input has cleared, but the tank low restart delay is active.
The number reflects the minutes left in the delay.
OP HOURS EXCEEDED: The current operating hours have exceeded the programmed limit.
Tank Full Operation
The unit can be operated with 1 or 2 level switches. With 1 level switch, the switch is connected to the
tank full high input. When this switch has been active for five seconds, the unit will shut down on tank
full. TANK FULL will show on the display. When the tank full condition clears, the display will show
TANK FULL 99. The number is the tank full restart time and the unit will restart when this delay times
out.
For 2 level switch operation, the upper switch is connected to the tank full high input and the lower
switch is connected to the tank full low input. When both switches are clear, the RO unit will run. The
RO unit will continue to run when the water level rises and the lower switch becomes active. When the
upper switch becomes active, after the five second delay, the RO unit will shut down. TANK FULL will
show on the display. When the tank level drops and the upper level switch clears, the display will show
TANK FULL 99 and the RO unit will remain off. The number is the tank full restart time and the number
will blink until the lower level switch clears. When the lower level switch clears, the number will remain
steady and the RO will restart when the delay times out.
Tank Full Restart
The tank full restart is the delay before the RO unit starts when a tank full condition clears. This delay
can be in minutes or in seconds. The TF Restart Setpoint selects seconds or minutes.
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