AmeriWater MRO3, Operation & Maintenance Manual

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MRO 3 & 4 MANUAL
27
98-0140
Rev. F
6.2 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.
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.
OPERATING HOURS
The current operating hours are shown on the bottom line.
TEMPERATURE