Agilent Technologies E7002, Reference Manual

Page: 20 / 33

20 E7002, E7012, and E7014 Emergency Discharge Unit
4
Troubleshooting
Problems
Front panel display conditions can give an indication of the
problem.
Display Possible Fault
No POWER LED.
•
Loss of F1, F2 (rear panel mounted) or
F3 (PCB mounted). *
HEATER OK LED not illuminated
when TEST button is pressed.
•
Loss of F4 (PCB mounted)*.
Heater and cable resistance > 18
Ω
.
Heater open circuit.
BATTERY OK LED not illuminated
when TEST button pressed.
•
Batteries not fully charged or require
replacing **
(ensure that batteries have charged for
at least 24 hours prior to testing)
B0 DUMP ON LED not illuminated
•
B0 shield switch heater open circuit
when B0 dump circuit operated