13 VFL Series User Manual v2.3 12/20
Status Indicators
‘A1’ and ‘A2’ Relay Status LEDs
These LEDs light when the associated Alarm relay is active. They flash when the Alarm
is configured as an ON or OFF Timer and the timer is running. Refer to the Alarm Timers
section.
'C1' and ‘C2’ Control Relays Status LEDs
These LEDs switch on/off as the associated control output switches on/off.
‘MA’ Manual Control Status
The rightmost decimal flashes on the SV display when the controller is in Manual mode
of operation. Refer to the Auto/Manual Control section.
‘AT’ Auto Tune Status
The rightmost decimal flashes on the PV display when the controller is Auto Tuning.
Refer to the Auto Tuning section for more information.
PV Display Error Messages (see Troubleshooting section)
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