Hamilton Sundstrand Company Gas Fuel Metering Valve HFG2.0 User Manual

 

 

RS232 Interface Inoperative  Incorrect wiring 

 
 
 
No or low 120 VDC power  
COM1 not connected 
RESET or RUN command is 
ON 

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 

No valve feedback 

No or low 120 VDC  power 
Self-protective valve auto shut 
down 

Ensure 120 VDC at valve 
Upload Fault File- check for motor windings over -
temperature faults. 
Check for valve contamination 

FAULT alarm 

Various 

Upload Fault File to identify source of fault 
Clear indicated fault 

OVER TEMP alarm 

Ambient temperature limit 
exceeded 
 
Electronics or motor winding 
temperature out of range 

Allow actuator to cool and re-start 
Reduce ambient temperature 

Check for valve contamination 

FAULT and OVERTEMP 
alarm 

No 120 VDC Power 
DSP Failure 

Ensure 120 VDC at actuator 
Contact factory 

 

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. 

 

CH. 4: TROUBLESHOOTING THE HFG2.0