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7/50D Plus or 7/50D Controller Chapter 7: Troubleshooting 83
Alarm message Possible cause
Output power failure
(Critical)
Power flat cable for network is not installed in ArmorBlock base
properly
Circuit breaker or overload protector has tripped. Pump failure
(Critical)
Contactor has malfunctioned.
Pump fault #1 (Function determined by your facility.)
Pump fault #2 (Function determined by your facility.)
Patch cord for contactor is disconnected.
Patch cord for contactor has been cut.
Pump starter output failure
(Critical)
Contactor coil is defective.
Patch cord for vent is disconnected.
Patch cord for vent has been cut.
Vent solenoid output failure
(Critical)
Vent solenoid valve has malfunctioned.
System Alarms
Alarm message Possible cause
Patch cord for horn or strobe light is disconnected.
Patch cord for horn or strobe light has been cut.
Central alarm failure
All horns and strobe lights for this central alarm are defective.
Power supply for a centralized purge valve is not turned on.
Power supply for a centralized purge is not connected properly.
An ArmorBlock for centralized purge valves is defective.
Base of an ArmorBlock for centralized purge valves is defective.
Centralized purge output power
failure
(Critical)
Power flat cable for network is not properly installed in the base of an
ArmorBlock for centralized purge valves.
Patch cord for a centralized purge valve is disconnected.
Patch cord for a centralized purge valve has been cut.
Solenoid for a centralized purge valve has malfunctioned.
An ArmorBlock for centralized purge valves is defective.
Base of an ArmorBlock for centralized purge valves is defective.
Network flat cable is not properly installed in the base of an
ArmorBlock for centralized purge valves.
Centralized purge valve failure
(Critical)
Note: Once you have found and corrected the cause of this alarm,
enable a station (p. 60) that uses the purge valve for which the alarm
occurred. (To identify such a station, go to a Station Operator screen
(p. 61) and navigate among the stations (p. 62) until you find a
station assigned to this purge valve.) Once the system successfully
uses this purge valve, it clears the alarm and enables all other
stations that use this valve.
Battery for the controller is defective.
PLC low battery
Battery for the controller is old and drained.
Power supply for network is not turned on.
Power supply for network is not connected properly.
Main enclosure is not connected properly.
Scanner communication failure
(Critical)
DeviceNet scanner is defective.
Scanner duplicate node
(Critical)
Two nodes (stations, pumps, central alarms, or centralized purge
valves) are assigned the same address.
The ArmorBlock for a pump has an address for a station.
The ArmorBlock for a central alarm has an address for a station.
Scanner incorrect node
assignment
(Critical)
The ArmorBlock for a station has an address for a pump.