I&O Manual - Solaris Water Heaters - Categories On Thermal ...

Trouble Shooting Guide (continued)LCD DisplayAlarm MessageRemote Input FailComm FailureLow Inlet TempMemory FailureRecommendedActionCheck Wiring andRemote SystemCheck Wiring andRemote SystemConfirm each waterheater has a uniqueaddressCheck wiring andsensorCheck return watertemperature. Considersystem or operationalchanges to avoid lowtemperature eventsCall Factory Resetall memories inSystem menu:Clr BIT HistoryClr Alarm HistClr Run Time CntClr Cycle CntFactory Defaults(Factory LevelPassword is required)ExplanationRemote Control Input FailThe Remote Control Input is configured and is not connected or is above or belowa valid range. When the remote control input fails the following control modechanges are taken automatically:Selected ModesRemote ModRemote Mod & Remote SensorRemote SPRemote SP & Remote SensorResulting Control ModeOutlet Sensor and Local SetpointRemote Sensor and Local SetpointOutlet Sensor and Local SetpointRemote Sensor and Local SetpointCommunication FailureThe Modbus or Peer-To-Peer network has failed. When the Modbus network failsthe following control mode changes are taken automatically:Selected ModesResulting Control ModeModbus ModOutlet Sensor and Local SetpointModbus Mod & Remote SensorRemote Sensor and Local SetpointModbus SPOutlet Sensor and Local SetpointModbus SP & Remote SensorRemote Sensor and Local SetpointAfter a Modus communication failure, the ‘Comm Failure’ alarm is not cleareduntil communication is restored and successfully writes to both the Remote On/ Off Modbus Command (00004) and Remote Firing Rate or Remote Setpoint(40006) points have been completed, power is cycled, or the protocol parameteris changed to Peer-To-Peer and then back to Modbus.When a Peer-To-Peer network has failed the water heaters begin operation asstand alone water heaters using the selected parameters.After a Peer-To-Peer communication failure the ‘Comm Failure’ alarm is notcleared until communication is restored and the water heater rejoins a networkwith at least one other water heater, power is cycled, or the protocol parameter ischanged to Modbus and then back to Peer-To-Peer.Low Water heater Inlet TemperatureIf the water heater inlet temperature is below the low water heater inlet temperaturesetpoint, the “Low Inlet Temp” Message is displayed and the water heaterinlet temperaturehistory is stored. See following page for additional information on low waterheater inlet temperature history storage and retrieval.Memory FailureNew software has been installed in the TSBC or a power interruption hascaused a memory failure. The Call For Heat will be prevented until the conditionis cleared.47