Hamilton Sundstrand Company Gas Fuel Metering Valve HFG2.0 User Manual
48 HFG2.0
USER
GUIDE
Fault Alarm Type
Persist Time
Fault Action
Driver Over Current
10 Sec
1 Sec
Driver current > Max Force equivalent
current, Fault.
Driver current > Max Force equivalent
current, Fault. If persists for 1 Min.,
Shutdown
Driver current > 18 Amps, Fault. If
persists for 1 Min., Shutdown
Tracking Error
10 Sec
If in RUN state, not in home dead band
and position error > allowable,
Fault.
If not in overcurrent, RDC not faulted and
feedback not equal to demand, Fault.
Watchdog Expired
< 1 Sec
If last reset was caused by watchdog
timer timeout or illegal address attempt,
Fault.
RDC Failure
< 1 Sec
Tests hardware for RDC failure, sets
Fault if RDC failure bit set.
Retract/Extended
Command
N/A
Fault not used.
Unregulated Voltage Low
10 Sec
Unregulated voltage low, Fault.
+14 Volts Low
7.5 Sec
< 1 Sec
+14 V supply < 12 V, Fault.
+14 Volts High
7.5 Sec
< 1 Sec
+14 V supply > 16 V, Fault.
-14 Volts Low
7.5 Sec
< 1 Sec
-14 V supply > -12 V, Fault.
-14 Volts High
7.5 Sec
< 1 Sec
-14 V supply < -16 V, Fault.
Input Voltage Low
7.5 Sec
< 1 Sec
Input Voltage < 75 V, Fault.
Input Voltage High
7.5 Sec
< 1 Sec
Input Voltage > 180 V, Fault.
DSP Failure
N/A
Fault not implemented.
Electronics Over Temp
10 Sec
Electronics
temp
≥ 110 °C, Fault
Table 3-3. Fault Configuration For FAULT Alarm