14
5.2
CONTROLLER OPERATION
General Operation
The unit has 2 modes of operation, a standby mode and an operating mode that are controlled by
the POWER key. In the standby mode, the unit is effectively off. All outputs are turned off and the
display shows STANDBY. In the operating mode, the unit operates automatically. All inputs are
monitored and the outputs are controlled accordingly. Pressing the POWER key will toggle the unit
from STANDBY to OPERATE or from OPERATE to STANDBY. If power is removed from the unit,
when power is reapplied, the unit will restart in the mode it was in when power was removed.
Display
The display is a 2 line x 20-character backlit liquid crystal display. System operating status and
sensor readings are shown on this display. Set point information can, also, be shown on this
display.
Operating Status Messages
The operating status of the unit is shown on the top line of the display. The following list describes
the items shown for the operating status.
STANDBY - The unit is in the STANDBY mode.
DELAY 99 - The unit is in the RO start delay. The number is the seconds remaining before the RO
pump starts.
OPERATING - The RO unit is operating.
TANK FULL - The unit is shut down due to a tank full condition.
TANK FULL 99 - The unit is shut down due to a tank full condition. If the number is blinking, the
tank full high switch has cleared, but the tank full low switch is still active. If the number is on
steady, both tank level switches have cleared and the delay is counting down.
PRETREAT - The unit is shut down due to a pretreat lockout condition.
PRESS FAULT - The unit is shut down due to a pressure fault condition.
MEMB FLUSH 99 – Membrane Flush is active. The number is the minutes remaining in the flush
cycle.
CONDUCTIVITY
The Conductivity is shown on the top line after the unit operating status. When the unit is in
STANDBY, because of a shut down condition, the reading is replaced with ‘----’. If the reading is
over range, the reading is shown as ‘^^^^’ when in the OPERATE mode.
Summary of Contents for 00HRO64800
Page 6: ...5 SECTION 3 COMPONENTS AND SCHEMATICS 3 1 HRO COMPONENT IDENTIFICATION...
Page 8: ...7 3 2 HRO FLOW DIAGRAM...
Page 9: ...8 3 3 HRO ELECTRICAL SCHEMATIC...
Page 19: ...18 FIGURE 5 2...
Page 20: ...19 FIGURE 5 3...
Page 37: ...36 9 2 SPARE PARTS LIST...
