FlowCon SM with BACnet actuator 1B95082 - 02/2023 Problem solving I n case there is any problem with the actuator and/or valve, pls. start with these procedures: Verify that none of the actuator’s objects are out- of-service (all out-of-service values are false). Check actuator state in MSV.45. If MSV.45=5 check which alarm(s) has been activated and try to resolve the alarm issue(s). Check all wiring to ensure that no loose connec- tions are interrupting the signals. Restart the actuator (disconnect power for a mo- ment). Please make sure that the failsafe action is completed and the actuator is shut off before restoring power. Auto-stroke Trigger an auto-stroke sequence to re-calibrate the valve’s closing point, by setting BV.63=1. The auto-stroke function will close the valve, then open the valve to fully open (regardless of chosen maximum flow) and return to the position specified by the control signal input. Please note that in cases where MSV.40=3 (control signal type is digital), the actuator finishes the auto- stroke sequence in fully open position regard- less of the chosen maximum flow. In these cases the auto-stroke sequence should be followed by giving the actuator control signal to close until the current flow rate is at or lower than the maxi- mum flow rate. The auto-stroke sequence cannot be can- celled. While the auto-stroke sequence is run- ning, the actuator state will be MSV.45=4. When the auto-stroke sequence is complete, the state of the auto-stroke object will return to disabled: BV.63=0 and the actuator state will return to nor- mal: MSV.45=1. Failsafe mode If the power supply is out of range or lost, failsafe mode will be activated: 1. BV.59=1 and MSV.45=5, there is a delay of approximately 60 sec. 2. BV.59=1 and MSV.45=6, the actuator opens/ closes the valve (according to failsafe direc- tion chosen in BV.18). 3. Actuator shuts off. If the power supply is restored during 1. or 2.,fail- safe mode is deactivated. BACnet fallback function If MSV.40=4 (control signal type is BACnet), the BACnet fallback function is activated: 1. When AV.141 is written to, a time counter starts. 2. If the counter reaches the value of AV.143, the action from MSV.43 starts. BV.62=1. 3. When AV.141 is written to the next time, the counter is reset and re-started. BV.62=0. Please note, that the actuator state does not go into alarm mode (MSV.45≠5) when the BACnet fallback action is activated (BV.62=1). If no BACnet fallback action is wanted, please choose MSV.43=2. FlowCon International assumes no responsibility for mistakes, if any, in any printed material. This paper is a supplement to the FlowCon SM Instruction Latest release of any FlowCon material is available on www.flowcon.com Page 4 of 4
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