AmeriWater MRO2X, Operation & Maintenance Manual

Page: 33 / 55

MRO2X
– 5X Manual
- 29 -
98-0058
Rev. R
TANK FULL OVERRIDE
A timed tank full override can be initiated when the MRO 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. The TANK FULL OVERRIDE will divert all
water to the drain, whether the water quality is good or bad coming into the RO.
PRESSURE FAULT
If the pressure fault input becomes active (closes) and stays active for the delay programmed in
the PF Delay Setpoint, 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.
AUTO RESET
If a pressure fault shut down occurs and the Auto Reset Setpoint is programmed to 0, the unit
will remain shut down until manually reset. If the Auto Reset Setpoint 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.
ALARM SILENCE
When a shut down 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 for 3 minutes [180
seconds (AAMI RD62 standard)] when the Alarm Silence Setpoint is programmed to the factory
default 3. If the Alarm Silence Setpoint is programmed to a value other than 3, the alarm will
resound after this delay times out. Pressing the Alarm Silence/Reset key will silence the alarm
and reset this delay.
PRETREAT
If the pretreat input becomes active (closes) 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.
HIGH CONDUCTIVITY
If the Conductivity reading exceeds the limit programmed the Cond Limit Setpoint for the delay
programmed in the Cond Delay Setpoint, the alarm lamp will light and the HI COND warning
message will show on the display. This warning will clear when the Conductivity drops below
the Setpoint.
When the High Conductivity warning message is active, the MRO will divert the PRODUCT
WATER to drain (through the Reject hose), until the Product water conductivity goes back into
the acceptable quality range.