46
098-0010 Rev C
Pretreatment
Lockout
Enabled
Pretreatment communicating it is
regenerating
X24 off
1) Check input for illumination and wiring
2) Check head on unit that is backwashing
1) Wait for pretreatment to complete
RO1 Quality
Over Range
Warning (MDP
only)
Stage 1 Permeate Conductivity
Sensor transmitting the
maximum detectable value for
300 seconds
1) Check sensor and wiring
2) Check conductivity board
3) Check cables between board and PLC
1) Check line cell
2) Perform chemical clean
RO1 Quality
Line Cell Error
Warning (MDP
only)
Stage 1 Permeate Conductivity
Sensor transmitting over the
maximum detectable value for
300 seconds
1) Check sensor and wiring
2) Check conductivity board
3) Check cables between board and PLC
1) Check line cell
2) Perform chemical clean
Leak Detected
Warning
Conductivity Board
1) Check expansion board is connected
and screwed into PLC
2) Check PLC to PCB adapter is plugged
into expansion board and into port on
Conductivity board
1) Connect expansion board
2) Connect adapter cable
3) Replace adapter cable
Temperature
Rise Warning
After 30 minutes, tank
temperature is lower than
previous reading during RO Heat
Disinfection
1) Check sensor and wiring
2) Check temperature card for power and
wiring
3) Check if heater breaker is tripped
1) Correct wiring
2) Flip the breaker on
Temperature
Hold Low
Warning
Tank Temperature Probe reading
is lower than Tank Return Probe
reading
1) Check the temp in the tank with a
calibrated measuring device
2) Check the return temperature
3) Check the wiring to the temperature
expansion card
4) Check probe is inserted all the way
1) Correct wiring
2) Replace probe
Note: The pumps will run slow during the RO Heat Disinfection and chemical clean process. If the pumps are running slow in normal
operation, ensure that the water temperature is below the Pump Run Slow set-point, factory set to 86 °F.
Note: If the permeate to the loop is over the alarm set-point, the MediQA will attempt to rectify this by closing the permeate valve and
performing a rinse. If this does not bring the quality within the allowable range, the RO will shut down and you will have a permeate quality
alarm.
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