© 2007 by General Electric Company. All rights reserved.
M1110150 006
11
Chapter 4: Troubleshooting
Symptom
Troubleshooting Steps
E
Indicator lights not working.
off
1.
Confirm failure condition.
2. Remove cover and check all connections.
3.
Check voltage across affected indicator LED pins on Display
PCB. If voltage is present, replace the Display PCB. If no
voltage is present, replace the Control PCB.
F
Light output measurement is out of
specification.
1. Check if the LED failure indicator is blinking. If it is blinking,
see
D
.
2.
Check that the fiberoptic pad connector is fully inserted and
that nothing is obstructing the port.
3.
Check the LED lenses inside the fiberoptic pad connector port
for discoloration or damage.
NOTE:
See Operation and Maintenance Manual for approved
cleaning procedure.
4.
Check the fiberoptic light pad and fiberoptic lenses on the
connector for discoloration or damage.
NOTE:
See Operation and Maintenance Manual for approved
cleaning procedure.
5. Make sure that the irradiance measurement follows the
procedure detailed in the Operation and Maintenance Manual.
6. Replace the LED module.
7.
If the problem persists, replace the fiberoptic light pad.
8. If the problem persists, replace the Control PCB.
G
Excessive fan noise
1.
Check the air filter for obstruction.
2. Check the fan for obstruction.
3. Replace the fan.
