WP440L-Series Reverse Osmosis System
Installation Instructions and User Manual
Page | - 22 -
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.
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 Set-point selects seconds or minutes.
A timed tank full override can be initiated when the RO unit is shut down due to a tank full condition. Pressing the Alarm
Silence/Reset key for 3 seconds during a tank full condition will enable the tank full override. The RO will start and TF
OVERRIDE 9 will show on the display. The number is the minutes remaining in the override timer. When the override times
out, the unit will return to the tank full shut down condition.
If the pressure fault input becomes active and stays active for the delay programmed in the PF Delay Set-point, the unit will
shut down for a pressure fault. The display will show PRESS FAULT, the alarm lamp will flash and the audible alarm will
sound. The pressure fault can be cleared by pressing the Alarm Silence/Reset key twice.
Note: The auto reset function is not active for this shut down.
If a pressure fault shut down occurs and the Auto Reset Set-point is programmed to 0, the unit will remain shut down until
manually reset. If the Auto Reset Set-point is programmed to a value greater than 0, the unit will automatically clear the
pressure fault and attempt to restart after this delay times out.
When a shutdown occurs that causes the audible alarm to sound, the alarm can be silenced by pressing the Alarm
Silence/Reset key once. The alarm will remain silenced if the Alarm Silence Set-point is programmed to 0. If the Alarm
Silence Set-point is programmed to a value greater than 0, the alarm will resound after this delay times out. Pressing the
Alarm Silence/Reset key will silence the alarm and reset this delay.
If the pretreat input becomes active and stays active for 2 seconds, the unit will shut down in a pretreat lockout condition.
PRETREAT will show on the display and the unit will remain shut down as long as the pretreat input is active.
Tank Full Restart
Tank Full Override
Pressure Fault
Auto Reset
Alarm Silence
Pretreat
