Flowserve Logix 1200e LGAIM0044 - Manual (Page 43)

Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611 44-43
Erratic communications 1. Maximum cable length or
impedance exceeded
1. HART modem not receiving
enough power. (laptop batteries
low)
1. Interference with I.S. barrier
1. See HART Communication on
page 44-35.
Alarms
Temperature 1. Ambient temperature has
exceeded electronics ratings
1. See Temperature Alarm on
page 44-37.
Hall sensor 1. Cable may have bad connection
1. Sensor may be damaged
1. See Hall Sensor Alarm on
page 44-37.
Modulator Current 1. Modulator minimum pressure
may be too low
1. Clogged orifice
1. Bad cable connection
1. See Modulator Current Alarm
on page 44-37.
EEPROM checksum 1. Error when reading non-volatile
memory storage
1. See EEPROM Checksum Alarm
on page 44-38.
Multiple Internal Flags 1. Bad micro-controller on main
PCB assembly
1. Replace main PCB assembly
LEDs
LED alternates between Green and
Red in normal operation 1. Modulator coil current may be
too high
1. Supply pressure may be close
to minimum of 30 psig (2.1 barg)
1. See Modulator Current Alarm
on page 44-37.
No LED blinks during calibration 1. Normal operation 1.
Yellow LED is blinking but valve posi-
tion is fine 1. User-defined limit may have
been reached; check alarm
screen
1. See Alerts on page 44-38.
Red LED is blinking on advanced
model, even though positioner has
pressure 1. Pressure below 30 psi (2.1 bar) 1. See Pressure Alarms on
page 44-38.
Advanced Features
Will not display pressure readings 1. Configuration not set to
Advanced
1. See Standard vs. Advanced
Diagnostics on page 44-40.
MPC will not function 1. Lower soft limit >= 0%.
1. 1% hysteresis around MPC set-
point being considered
1. See MPC (Minimum Position
Cutoff) on page 44-38.
Table IV: Troubleshooting Logix 1200 Digital Positioner (3 of 3)
Failure or Problem Probable Cause(s) Refer to Section(s)