Trane UHMB060ACV3VA Series - Troubleshooting Specific Faults; 7 Flash Fault LED Troubleshooting

48 UHM-DHM-SF-1H
Service Facts
DEFINITION: External Gas
Valve Circuit Error (24 volts is
present when it should not be
present)
Scroll through
User Interface to
View number 1 of
Last 4 Faults
User Interface
shows EXT GV
ERR?
Is 24VAC nominal voltage
present at gas valve connections
to chassis ground?
Red wire to Ground
Blue Wire to Ground
Turn Comfort
Control to “OFF”
position
Correct wiring
Check operation
YES
Replace IFC
NO
7 Flash Fault LED