51
98-0157 Rev P
FAULTS AND FAULT FINDING
See the Diagnostic Guide, 098-0010, for Checks and Proposed Actions for each alarm.
ALARMS will stop machine operation. It is not possible to restart the machine without addressing the
fault.
Alarm Description
Reason
ALARMS
RO1 Pump Over
Pressure Alarm
Stage 1 Pump pressure switch (PS2) registers value higher than set-
point on pressure switch for 5 seconds – X7 off
RO2 Pump Over
Pressure Alarm (MDP
only)
Stage 2 Pump pressure switch (PS3) registers value higher than set-
point on pressure switch for 5 seconds – X11 off
RO1 Pump Fault Alarm
Stage 1 Pump communicating fault condition – X1 on
RO2 Pump Fault Alarm
(MDP only)
Stage 2 Pump communicating fault condition – X2 on
Temperature High
Alarm
Loop Over Temp Alarm Set-point Exceeded
Output Quality Alarm
Output Quality Alarm Set-point Exceeded
Tank Quality Alarm
Tank Quality Alarm Set-point Exceeded
Water Loss Alarm
Low Level Tank Float Switch opened during Chemical Clean or RO
Heat Disinfect process – X4 off
Over Temperature Fault
Alarm
Any RO Heat Disinfection Temp Set-point Exceeded
Emergency Stop
Activated Alarm
E Stop button pressed on front of control panel – X0 off
PLC Analogue Card Error
Alarm
PLC Analog Card communicating fault condition
PLC to PCB Comms Error
Alarm
Communication port where conductivity board connects to PLC not
receiving information
Output High Pressure
Alarm
Delivery pressure switch registers value higher than set-point on
pressure switch for 5 seconds – X12 off
Loop Return Valve
Position Alarm
Loop Return M. Valve not sending close limit 30 seconds after being
told to close during RO Heat Disinfect or Chemical clean – Y23 on, X22
off
Permeate Valve Position
Alarm
Permeate M. Valve being told to open to loop during RO Heat
Disinfection or Chemical Clean
Heater Over
Temperature Alarm
Thermostat Over Temperature signal from Heater – X23 off
Feed Water Alarm
Base Level Tank Float Switch opened during operation – X3 off
Output Quality Rinse
Alarm
Output Quality exceeds the Output Quality Alarm Set-point after the
Auto Rinse Max time is met
Output Flow Rate High
Alarm
Output flow detected above High Flow Alarm set-point
Summary of Contents for 00MDP2-230
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