Table 5-1. Initial Installation Troubleshooting Chart; Table 5-2. Hfg2.0 In-Service Troubleshooting Chart - Hamilton Sundstrand Company Gas Fuel Metering Valve HFG2.0 User Manual

Symptom
RS232 Interface Inoperative
Symptom
No valve feedback
FAULT alarm
OVER TEMP alarm
FAULT and OVERTEMP
alarm
Probable Causes
Incorrect wiring
No or low 120 VDC power
COM1 not connected
RESET or RUN command is
ON

Table 5-1. Initial Installation Troubleshooting Chart

Probable Causes
No or low 120 VDC power
Self-protective valve auto shut
down
Various
Ambient temperature limit
exceeded
Electronics or motor winding
temperature out of range
No 120 VDC Power
DSP Failure

Table 5-2. HFG2.0 In-Service Troubleshooting Chart

For troubleshooting purposes, use Table 5-3 to verify the valve electrical
continuity integrity.
Disconnect the HFG2.0 power and digital harness connectors and use a
digital multi-meter (DMM) to check the resistance values between the
wires indicated on the table. If an open circuit is detected, send the
HFG2.0 to Precision Engine Controls Corporation for test and repair.
Remove all power to the HFG2.0 prior to continuity check.
Corrective Action
Ensure WHITE/ORANGE/YELLOW,
WHITE/ORANGE/BLUE, WHITE/ORANGE/GREEN
wires correctly connected to valve and laptop PC.
Ensure 120 VDC Primary System Power at Valve
Check laptop/PC com port
Remove RESET or RUN command
Corrective Action
Ensure 120 VDC at valve
Upload Fault File- check for motor windings over -
temperature faults.
Check for valve contamination
Upload Fault File to identify source of fault
Clear indicated fault
Allow actuator to cool and re-start
Reduce ambient temperature
Check for valve contamination
Ensure 120 VDC at actuator
Contact factory
WARNING – Shock Hazard
CH. 4: TROUBLESHOOTING THE HFG2.0
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